Main
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CONTENTS
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About This Guide
Document Revision History
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Objectives
Audience
Organization
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Conventions
Related Documentation
Obtaining Documentation, Obtaining Support, and Security Guidelines
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Cisco ASR 901 Router Overview
Introduction
Features
Performance Features
Management Options
Manageability Features
Security Features
Quality of Service and Class of Service Features
Layer 3 Features
Layer 3 VPN Services
Monitoring Features
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Licensing
Licenses Supported on Cisco ASR 901 Router
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License Types
Image Level License
Features Supported
Feature Based License
Port Based/Mode License
Port or Interface Behavior
2-6
Port Based License
Example: When Port Based License is not Installed
Example: When Port Based License is Installed
The following example shows how to install the port based license:
10gigUpgrade License
Example: When 10gigUpgrade License is not Installed
Example: When 10gigUpgrade License is Installed
Flexi License
Example: When Flexi License is not Installed
Example: When Flexi License is Installed
1588BC License
Example: When 1588BC License is not Installed
Example: When 1588BC License is Installed
2-10
Following is a sample output from the show license command:
Removing the 1588BC License
Complete the following steps to remove the 1588BC license.
Step 1 Use the no ptp clock command to remove the PTP boundary clock configuration.
Step 2 Use the license clear command to remove the 1588BC license.
Generating the License
Installing the License
Changing the License
Return Materials Authorization License Process
Example: RMA Process
2-14
Verifying the License
To verify the new license, use the show license command.
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Feature Information for Licensing
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First-Time Configuration
Setup Mode
Before Starting Your Router
Using Setup Mode
Configuring Global Parameters
3-3
Note The messages vary, depending on the Cisco IOS software image and interface modules in your
Step 2 To begin the initial configuration dialog, enter yes when the following message appears:
Step 3 Enter a hostname for the router (this example uses 901-1).
viewing the configuration.
Completing the Configuration
Verifying the Cisco IOS Software Version
Configuring the Hostname and Password
Verifying the Hostname and Password
Managing and Monitoring Network Management Features
Network Management Features for the ASR 901
Cisco Active Network Abstraction (ANA)
SNMP MIB Support
Cisco Networking Services (CNS)
How to Configure Network Management Features on ASR 901
Configuring SNMP Support
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Configuring Remote Network Management
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Enabling Cisco Networking Services (CNS) and Zero-Touch Deployment
Zero-Touch Deployment
Image Download
Configuring a DHCP Server
Configuring a TFTP Server
Creating a Bootstrap Configuration
Enabling a TFTP Server on the Edge Router
Configuring the Cisco Configuration Engine
4-15
Example: Configuring SNMP Support
Example: Configuring Remote Network Management
Example: Configuring a DHCP Server
Example: Zero-touch Deployment
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Feature Information for Monitoring and Managing the ASR 901
Using the Command-Line Interface
Understanding Command Modes
Page
Understanding the Help System
Understanding Abbreviated Commands
Understanding no and default Forms of Commands
Understanding CLI Error Messages
Using Command History
Changing the Command History Buffer Size
Recalling Commands
Disabling the Command History Feature
Using Editing Features
Enabling and Disabling Editing Features
Editing Commands through Keystrokes
Editing Command Lines that Wrap
Searching and Filtering Output of show and more Commands
Accessing the CLI
Accessing the CLI through a Console Connection or through Telnet
Saving Configuration Changes
Software Upgrade
Selecting a Cisco IOS Image
Upgrading the Cisco IOS image
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Page
6-4
AUTO_UPGRADE_ROMMON to TRUE or FALSE:
Auto Upgrading the MCU
MCU Auto upgrade can be enabled or disabled by setting the ROMMON variable
Manually Upgrading the ROMMON
Auto Upgrade of ROMMON
Configuring Gigabit Ethernet Interfaces
Configuring the Interface
Setting the Speed and Duplex Mode
Enabling the Interface
Modifying MTU Size on the Interface
Verifying the MTU Size
MAC Flap Control
Configuring MAC FLap Control
Configuring a Combo Port
Page
7-8
Verifying the Media Type
Following is a sample output when fiber-optic is selected as the physical connection:
Following is a sample output when the media type is auto-select and the interface is down:
Configuring Ethernet Virtual Connections
Supported EVC Features
Understanding EVC Features
Ethernet Virtual Connections
Service Instances and EFPs
Encapsulation
Bridge Domains
DHCP Client on Switch Virtual Interface
Split-Horizon
Rewrite Operations
Configuring EFPs
Default EVC Configuration
Configuration Guidelines
Creating Service Instances
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Configuration Examples of Supported Features
Example: Configuring a Service Instance
Example: Encapsulation Using a VLAN Range
Example: Two Service Instances Joining the Same Bridge Domain
Example: Bridge Domains and VLAN Encapsulation
Example: Rewrite
Example: Split Horizon
Configuration Examples of Unsupported Features
Example: Filtering
Example: Overlapping Encapsulation
How to Configure EVC Default Encapsulation
Configuring EVC Default Encapsulation with Bridge-Domain
Configuring EVC Default Encapsulation with Xconnect
Verifying EVC Default Encapsulation with Bridge-Domain
Verifying EVC Default Encapsulation with Xconnect
Configuration Examples for EVC Default Encapsulation
Example: Configuring EVC Default Encapsulation with Bridge-Domain
Example: Configuring EVC Default Encapsulation with Xconnect
Configuring Other Features on EFPs
EFPs and EtherChannels
MAC Address Forwarding, Learning and Aging on EFPs
Disabling MAC Address Learning on an Interface or Bridge Domain
Configuration Examples
Configuring IEEE 802.1Q Tunneling using EFPs
802.1Q Tunneling (QinQ)
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8-22
You can use EFPs to configure 802.1Q tunneling in two ways:
User-to-Network Interface (UNI) is not enforced if the range is more than 1000.
Routed QinQ
Configuration Example
Example: User to Network Interface
Example: Network to Network Interface/Core Router
Bridge Domain Routing
Example: Configuring Bridge-Domain Routing
How to Configure DHCP Client on SVI
Configuring DHCP Client on SVI
Verifying DHCP Client on SVI
Configuration Example for DHCP Client on SVI
EFPs and Switchport MAC Addresses
EFPs and MSTP
Monitoring EVC
Sample Configuration with Switchport to EVC Mapping
8-30
Configuration Example
8-31
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Feature Information for Configuring Ethernet Virtual Connections
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Configuring EtherChannels
Understanding How EtherChannels Work
EtherChannel Feature Overview
Understanding How EtherChannels Are Configured
EtherChannel Configuration Overview
Understanding Manual EtherChannel Configuration
Understanding IEEE 802.3ad LACP EtherChannel Configuration
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Understanding Port-Channel Interfaces
Understanding Load Balancing
EtherChannel Configuration Guidelines and Restrictions
Configuring Etherchannels
Configuring Channel Groups
Configuring the LACP System Priority and System ID
Configuring the LACP Transmit Rate
Verifying the LACP Transmit Rate
Configuring EtherChannel Load Balancing
Modifying MTU Size on Port-Channel
Verifying the MTU Size on Port-Channel
EVC On Port-Channel
Restrictions for EVC EtherChannel
Configuring EVC on Port-Channel
Verifying the Configuration
Troubleshooting
Configuring Ethernet OAM
Contents
Understanding Ethernet CFM
IP SLA Support for CFM
Configuring Ethernet CFM
Default Ethernet CFM Configuration
Ethernet CFM Configuration Restrictions and Guidelines
Configuring the CFM Domain
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Configuring Multi-UNI CFM MEPs in the Same VPN
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Configuration Examples for Multi-UNI CFM MEPs
10-11
Use the following commands to verify a configuration:
Use the show ethernet cfm maintenance-point local command to verify the Multi-UNI CFMs over
EVC configuration. This command shows the basic configuration information for Multi-UNI CFM.
Use the show ethernet cfm maintenance-point remote to verify the MEP configuration:
Configuring Ethernet CFM Crosscheck
Configuring Static Remote MEP
Configuring a Port MEP
Configuring SNMP Traps
Configuring IP SLA CFM Operation
Manually Configuring an IP SLA CFM Probe or Jitter Operation
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Configuring an IP SLA Operation with Endpoint Discovery
Configuring CFM over EFP with Cross Connect
Configuring CFM over EFP Interface with Cross Connect
Examples
10-22
Example for single tag Encapsulation
Configuring CFM over EFP Interface with Cross ConnectPort Channel-Based Cross Connect Tunnel
Examples
Use the following commands to verify a configuration:
Use the show ethernet cfm maintenance-point local commands to verify the CFM over EVC
configuration. This command shows the basic configuration information for CFM.
10-23
Use the show ethernet cfm maintenance-point remote to verify the MEP configuration:
Use the show ethernet cfm mpdb command to verify the catalouge of CC with MIP in intermediate
routers.
Configuring CFM with EVC Default Encapsulation
Verifying CFM with EVC Default Encapsulation
Example: Configuring CFM with EVC Default Encapsulation
Configuring Y.1731 Fault Management
Default Y.1731 Configuration
Configuring ETH-AIS
Configuring ETH-LCK
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Managing and Displaying Ethernet CFM Information
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Understanding the Ethernet OAM Protocol
OAM Features
Discovery
Link Monitoring
Remote Failure Indication
Remote Loopback
Cisco Vendor-Specific Extensions
OAM Messages
Setting Up and Configuring Ethernet OAM
Default Ethernet OAM Configuration
Restrictions and Guidelines
Enabling Ethernet OAM on an Interface
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Enabling Ethernet OAM Remote Loopback
Configuring Ethernet OAM Link Monitoring
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Configuring Ethernet OAM Remote Failure Indications
Configuring Ethernet OAM Templates
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Displaying Ethernet OAM Protocol Information
Verifying Ethernet OAM Configuration
10-47
Verifying Link Monitoring Configuration and Status
Understanding E-LMI
Configuring E-LMI
Default E-LMI Configuration
Enabling E-LMI
Displaying E-LMI Information
Understanding Ethernet Loopback
Configuring Ethernet Loopback
Enabling Ethernet Loopback
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Configuration Example
10-55
This example shows how to configure Ethernet Internal Loopback for cross connect:
GigabitEthernet0/0
This following is the example of the output from the show ethernet loopback command:
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Configuring Y.1564 to Generate Ethernet Traffic
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Configuring IP SLA for Traffic Generation
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10-61
Example: Two-Way Measurement
Example: Traffic Generation Mode
The following is a sample configuration for traffic generation mode to measure tx and txbytes.
10-62
The following is an example of the output from the show ip sla statistics command.
ITU-T Y.1731 Performance Monitoring
Prerequisites for ITU-T Y.1731 Performance Monitoring
Restrictions for ITU-T Y.1731 Performance Monitoring
Information About ITU-T Y.1731 Performance Monitoring
Frame Delay and Frame-Delay Variation
Frame Loss Ratio
On-Demand and Concurrent Operations
Supported interfaces
Benefits of ITU-T Y.1731 Performance Monitoring
How to Configure ITU-T Y.1731 Performance Monitoring
Configuring Two-Way Delay Measurement
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What to Do Next
Configuring Single-Ended Synthetic Loss Measurement
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What to Do Next
Scheduling IP SLAs Operations
11-15
Verifying the Frame Delay and Synthetic Loss Measurement Configurations
Enter your password if prompted.
Step 3 Do one of the following:
Step 4
Exits global configuration mode and enters privileged EXEC mode.
Example: Verifying Sender MEP for a Two-Way Delay Measurement Operation
Example: Verifying Receiver MEP for a Two-Way Delay Measurement Operation
Note The Cisco ASR 901 router supports hardware-based timestamping. Enable the hardware-based
timestamping using the dmm responder hardware timestamp command on the receiver MEP.
11-17
Example: Verifying Sender MEP for a Synthetic Loss Measurement Operation
Example: Verifying Ethernet CFM Performance Monitoring
To view the Ethernet CFM performance monitoring activities, use the show ethernet cfm pm command.
11-18
Example: Verifying History for IP SLAs Operations
To view the history collected for IP SLAs operations, use the show ip sla history command.
Note The show ip sla history full command is not supported for the ITU-T Y.1731 operations.
How to Configure IP SLAs Y.1731 On-Demand and Concurrent Operations
Configuring Direct On-Demand Operation on a Sender MEP
Configuring Referenced On-Demand Operation on a Sender MEP
11-21
Configuring IP SLAs Y.1731 Concurrent Operation on a Sender MEP
Configuration Examples for IP SLAs Y.1731 On-Demand Operations
Example: On-Demand Operation in Direct Mode
11-22
Example: On-Demand Operation in Referenced Mode
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Feature Information for ITU-T Y.1731 Performance Monitoring
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Configuring Resilient Ethernet Protocol
Understanding Resilient Ethernet Protocol (REP)
Overview
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Link Integrity
Fast Convergence
VLAN Load Balancing (VLB)
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Spanning Tree Interaction
REP Ports
Configuring Resilient Ethernet Protocol (REP)
Default REP Configuration
REP Configuration Guidelines
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Configuring the REP Administrative VLAN
Configuring REP Interfaces
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Configuring REP as Dual Edge No-Neighbor Port
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12-18
Cisco ASR 901 Dual Rep Edge No-Neighbor Topology Example
Note This section provides partial configurations intended to demonstrate a specific feature.
ASR_1
7600_1
12-19
7600_2
Setting up Manual Preemption for VLAN Load Balancing
Configuring SNMP Traps for REP
Monitoring REP
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Configuration Examples for REP
Configuring the REP Administrative VLAN: Example
Configuring a REP Interface: Example
12-25
Figure 6 Example of VLAN Blocking
Setting up the Preemption for VLAN Load Balancing: Example
The following is an example of setting the preemption for VLAN load balancing on a REP segment.
Configuring SNMP Traps for REP: Example
This example shows how to configure the router to send REP traps at a rate of 10 traps per second:
Monitoring the REP Configuration: Example
Cisco ASR 901 Topology Example
Note This section provides partial configurations intended to demonstrate a specific feature.
ASR_1
12-27
ASR_2
12-28
7600_1
7600_2
12-29
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Configuring MST
Overview of MST and STP
Overview of MST on EVC Bridge Domain
Restrictions and Guidelines
13-3
When an MST is configured on the outer VLAN, you can configure any number of service instances
with the same outer VLAN as shown in the following configuration example.
Configuring MST on EVC Bridge Domain
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Configuration Example for MST on EVC Bridge Domain
Verification
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13-8
This example shows MST on port channels:
Troubleshooting Tips
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Configuring Multiprotocol Label Switching
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Configuring EoMPLS
Understanding EoMPLS
Configuring EoMPLS
EoMPLS Configuration Example
Configuring Pseudowire Redundancy
Configuration Commands
Port Based EoMPLS
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Configuring MPLS VPNs
Understanding MPLS VPNs
16-2
Configuring MPLS VPNs
Configuration Examples for MPLS VPN
This section contains the following sample configurations involving three routers:
PE1 Configuration, page 16-2 Provider Configuration, page 16-5 PE2 Configuration, page 16-6
PE1 Configuration
16-3
16-4
16-5
Provider Configuration
16-6
PE2 Configuration
Interface details
16-7
OSPF and BGP details
16-8
Loop Back details
16-9
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Configuring MPLS OAM
Understanding MPLS OAM
LSP Ping
LSP Traceroute
LSP Ping over Pseudowire
Configuring MPLS OAM
Using LSP Ping for LDP IPv4 FEC
Using LSP Traceroute for LDP IPv4 FEC
Using LSP Ping for Pseudowire
Using LSP Traceroute over Pseudowire
Displaying AToM VCCV capabilities
Configuring Routing Protocols
Changing Default Hashing Algorithm for ECMP
Page
Configuring Bidirectional Forwarding Detection
Understanding BFD
Configuring BFD
BFD Configuration Guidelines and Restrictions
Configuring BFD for OSPF
Configuring BFD for OSPF on One of More Interfaces
Configuring BFD for OSPF on All Interfaces
Configuring BFD for BGP
Configuring BFD for IS-IS
Configuring BFD for IS-IS on a Single Interface
Configuring BFD for IS-IS for All Interfaces
Configuring BFD for Static Routes
Configuration Examples for BFD
BFD with OSPF on All Interfaces
BFD with OSPF on Individual Interfaces
19-8
BFD with BGP
BFD with IS-IS on All Interfaces
BFD with IS-IS on Individual Interfaces
19-9
BFD with Static Routes
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Configuring T1/E1 Controllers
Configuring the Card Type
Configuring E1 Controllers
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Configuring T1 Controllers
Troubleshooting Controllers
Troubleshooting E1 Controllers
Troubleshooting T1 Controllers
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Configuring Pseudowire
Understanding Pseudowires
Structure-Agnostic TDM over Packet
Structure-Aware TDM Circuit Emulation Service over Packet-Switched Network
Transportation of Service Using Ethernet over MPLS
Limitations
Hot Standby Pseudowire Support for ATM/IMA
Configuring Pseudowire
Configuring Pseudowire Classes
Page
Configuring CEM Classes
Page
Configuring a Backup Peer
Configuring Structure-Agnostic TDM over Packet
Page
Configuring a SAToP Pseudowire with UDP Encapsulation
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Configuring Circuit Emulation Service over Packet-Switched Network
Configuring a CESoPSN Pseudowire with UDP Encapsulation
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QoS for CESoPSN over UDP and SAToP over UDP
Configuring Transportation of Service Using Ethernet over MPLS
Page
Configuring L2VPN Pseudowire Redundancy
Page
Example: Pseudowire Redundancy
Configuring Hot Standby Pseudowire Support for ATM/IMA
Configuring ATM/IMA Pseudowire Redundancy in PVC Mode
Page
Configuring ATM/IMA Pseudowire Redundancy in PVP Mode
Configuring ATM/IMA Pseudowire Redundancy in Port Mode
Verifying Hot Standby Pseudowire Support for ATM/IMA
21-27
TDM Local Switching
Note Effective with 15.2(2)SNH1 release, you can configure local switching on the T1 or E1 mode.
Configuring TDM Local Switching on a T1/E1 Mode
21-29
Step 3
interface-name
connection-name
Configuration Example for Local Switching
The following is a sample configuration of local switching:
Selects the CEM interface to configure the pseudowire.
interface-name
Configuration Examples of Hot Standby Pseudowire Support for ATM/IMA
Example: Configuring ATM/IMA Pseudowire Redundancy in PVC Mode
Example: Configuring ATM/IMA Pseudowire Redundancy in PVP Mode
21-31
Example: Configuring ATM/IMA Pseudowire Redundancy in Port Mode
Configuration Examples for Pseudowire
This section contains the following examples:
Example: TDM over MPLS Configuration-Example
Figure 21-3 shows a TDM over MPLS configuration. The configuration uses CESoPSN for E1.
ASR_A
21-32
21-33
ASR_B
21-34
Example: CESoPSN with UDP
Note This section provides a partial configuration intended to demonstrate a specific feature.
The following configuration uses CESoSPN with UDP encapsulation.
21-35
Example: Ethernet over MPLS
The following configuration example shows an Ethernet pseudowire (aka EoMPLS) configuration.
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Feature Information for Configuring Pseudowire
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Configuring Clocking
Restrictions
Configuring Network Clock for Cisco ASR 901 Router
Configuring Network Clock in Global Configuration Mode
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Configuring Network Clock in Interface Configuration Mode
Understanding SSM and ESMC
Synchronization Status Message
Ethernet Synchronization Messaging Channel
Clock Selection Algorithm
ESMC behavior for Port Channels
Configuring ESMC in Global Configuration Mode
Configuring ESMC in Interface Configuration Mode
Verifying ESMC Configuration
22-11
show network-clock synchronization
You can manage the synchronization using the following management commands:
Managing Synchronization
22-12
Synchronization Example
Example 22-1 Configuration for QL-disabled mode clock selection
Example 22-2 GPS Configuration
Clears the forced switch and manual switch commands.
22-13
Configuring Synchronous Ethernet for Copper Ports
You can configure synchronization on the copper ports using the following commands:
Verifying the Synchronous Ethernet configuration
Use the show network-clock synchronization command to display the sample output.
22-14
22-15
Troubleshooting Tips
Troubleshooting ESMC Configuration
Configuring PTP for the Cisco ASR 901 Router
Setting System Time to Current Time
Configuring PTP Ordinary Clock
Configuring Master Ordinary Clock
Page
Configuring Slave Ordinary Clock
Page
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Page
Configuring PTP in Unicast Mode
Configuring PTP in Unicast Negotiation Mode
PTP Boundary Clock
Configuring PTP Boundary Clock
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22-29
Verifying PTP modes
Ordinary Clock
Use the show ptp clock dataset current command to display the sample output.
Use the show ptp clock dataset default command to display the sample output.
Use the show ptp clock dataset parent domain command to display the sample output.
22-30
Use the show ptp clock dataset time-properties domain command to display the sample output.
Boundary Clock
Use the show ptp clock dataset current command to display the sample output.
Use the show ptp clock dataset default command to display the sample output.
Verifying PTP Configuration on the 1588V2 Slave
22-32
Verifying PTP Configuration on the 1588V2 Master
A typical configuration on a 1588V2 master is:
Use the show ptp clock running domain command to display the PTP clock configuration:
22-33
Use the show platform ptp stats command to display the PTP statistics:
PTP Hybrid Clock
Configuring a Hybrid Ordinary Clock
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Page
Configuring a Hybrid Boundary Clock
Verifying Hybrid modes
22-39
Use the show ptp clock running domain command to display the sample output.
SSM and PTP Interaction
ClockClass Mapping
Telecom Profiles
PTP Redundancy
Configuring Telecom Profile in Slave Ordinary Clock
Page
Configuring Telecom Profile in Master Ordinary Clock
Verifying Telecom profile
22-45
Use the show ptp clock running domain command to display the sample output.
Setting the TimeProperties
ASR901 Negotiation Mechanism
Static Unicast Mode
Configuring ToD on 1588V2 Slave
Troubleshooting Tips
Page
Cisco IOS IP SLA
Configuring IPSLA Path Discovery
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23-3
Following parameters can be configured in the auto-ip-sla-mpls-params mode:
Following parameters can be configured in the auto-ip-sla-mpls-lpd-params mode:
Example for IPSLA Path Discovery
23-4
This example shows the LPD parameter values configured:
Two-Way Active Measurement Protocol
Configuring TWAMP
Configuring the TWAMP Server
Configuring the TWAMP Reflector
Configuration Examples for TWAMP
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Configuring QoS
Understanding QoS
Page
Modular QoS CLI
Input and Output Policies
Input Policy Maps
Output Policy Maps
Access Control Lists
Classification
Class Maps
The match Command
Classification Based on Layer 2 CoS
Classification Based on IP Precedence
Classification Based on IP DSCP
Classification Comparisons
Classification Based on QoS Groups
Classification Based on VLAN IDs
Table Maps
Policing
Individual Policing
Configuration Examples
Unconditional Priority Policing
Egress Policing
Marking
Congestion Management and Scheduling
Traffic Shaping
Class-Based Shaping
Port Shaping
Parent-Child Hierarchy
Class-Based Weighted Fair Queuing
Page
Priority Queuing
Ingress and Egress QoS Functions
Configuring Quality of Service (QoS)
QoS Limitations
General QoS Limitations
Statistics Limitations
Propagation Limitations
Classification Limitations
Marking Limitations
Congestion Management Limitations
ACL-based QoS Restrictions
Improving Feature Scalability
TCAM with QoS
QoS for MPLS/IP over MLPPP
QoS for CPU Generated Traffic
QoS Configuration Guidelines
Sample QoS Configuration
Configuring Classification
Creating a Class Map for Classifying Network Traffic
Creating a Policy Map for Applying a QoS Feature to Network Traffic
Attaching the Policy Map to an Interface
Attaching Policy Map to Cross Connect EVC
Configuring Marking
Creating a Class Map for Marking Network Traffic
Creating a Policy Map for Applying a QoS Feature to Network Traffic
Attaching the Policy Map to an Interface
Configuring MPLS Exp Bit Marking using a Pseudowire
Configuring Congestion Management
Configuring Low Latency Queueing (LLQ)
Configuring Multiple Priority Queueing
Page
Configuring Class-Based Weighted Fair Queuing (CBFQ)
Weighted Random Early Detection (WRED)
Configuring Shaping
Configuring Class-Based Traffic Shaping in a Primary-Level (Parent) Policy Map
Configuring the Secondary-Level (Child) Policy Map
Configuring Ethernet Trusted Mode
Creating IP Extended ACLs
Using Class Maps to Define a Traffic Class
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Creating a Named Access List
What to do Next
24-54
TCAM with ACL
Configuration Examples for ACL
The following is a sample output of the show ip access-lists tcam command.
24-55
Verifying Named Access List
To verify the ACL-based QoS classification, use the show policy-map command as given below:
24-56
Configuration Example for Named Access List
The following is the sample configuration of a named access list on the Cisco ASR 901 Router.
not related to each other.
24-57
24-58
24-59
24-60
24-61
QoS Treatment for Performance-Monitoring Protocols
Cisco IP-SLAs
QoS Treatment for IP-SLA Probes
Marking
Queuing
QoS Queuing for CPU-Generated Traffic
Extending QoS for MLPPP
Configuring Class-map for Matching MPLS EXP Bits
Configuring Class-map for Matching IP DSCP Value
Configuring Class-map for Matching MPLS EXP Bits or IP DSCP Value
Configuring a Policy-map
Page
Page
Attaching the Policy-map to MLPPP Interface
Page
Re-marking IP DSCP Values of CPU Generated Traffic
Re-marking MPLS EXP Values of CPU Generated Traffic
Configuring a Policy-map to Match on CS5 and EXP4
Page
Attaching the Policy-map to Match on CS5 and EXP4 to MLPPP Interface
Configuration Examples for Extending QoS for MPLS over MLPPP
Configuring Class-map for Matching MPLS EXP Bits
24-77
Configuring Class-map for Matching IP DSCP Value
The following example shows a configuration of class-map for matching IP DSCP value.
Configuring Class-map for Matching MPLS EXP Bits or IP DSCP Value
Configuring a Policy-map
The following example shows a configuration of a policy-map.
Configuring a Policy-map to Match on CS5 and EXP 4
The following example shows a configuration of a policy-map.
Attaching the Policy-map to MLPPP Interface
The following example shows a configuration of attaching the policy-map to MLPPP interface.
Verifying MPLS over MLPPP Configuration
Configuration Guidelines
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24-84
2. To free up a slice by unconfiguring features that are no longer required.
Configuring a service-policy fails because of insufficient resources.
24-85
We now have enough free entries to configure policy2.
24-86
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Feature Information for Configuring QoS
Configuring MLPPP
Prerequisites
Restrictions
MLPPP Optimization Features
Distributed Multilink Point-to-Point Protocol Offload
Multiclass MLPPP
MPLS over MLPPP
MPLS Features Supported for MLPPP
MPLS over MLPPP on PE-to-CE Links
25-5
MPLS over MLPPP on Core Links
MPLS over MLPPP on CE to PE Links
Configuring MLPPP Backhaul
Configuring the Card Type, E1 and T1 Controllers
Configuring a Multilink Backhaul Interface
Creating a Multilink Bundle
Configuring MRRU
Configuring PFC and ACFC
Configuring PFC
Page
Configuring ACFC
Enabling Multilink and Identifying the Multilink Interface
Configuring a Serial Interface as a Member Link of a MLPPP Group
MLPPP Offload
Configuring Additional MLPPP Settings
Configuring MPLS over the MLPPP on a Serial Interface
Page
Configuring MPLS over MLPPP for OSPF
Page
Configuration Examples for MPLS over MLPPP
25-19
The following example shows a sample configuration of MPLS over MLPPP for a Serial Interface.
Verifying MPLS over MLPPP Configuration
25-20
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Feature Information for MLPPP
Onboard Failure Logging
Understanding OBFL
26-2
Configuring OBFL
module 0
Use the following commands to configure and verify OBFL:
Verifying OBFL Configuration
Example 1
26-3
26-4
Hot Standby Router Protocol and Virtual Router Redundancy Protocol
Information About HSRP and VRRP
Overview of HSRP and VRRP
Text Authentication
Preemption
How to Configure HSRP
Configuring HSRP
27-4
Enables privileged EXEC mode.
Step 8
Step 7
Step 6
Configuration Examples for HSRP
Example: Configuring HSRP Active Router
Example: Configuring HSRP Backup Router
object-number [decrement priority-decrement]
Step 10
How to Configure VRRP
Configuring VRRP
Page
27-8
Returns to privileged EXEC mode.
group-number
Configuration Examples for VRRP
Example: Configuring a VRRP Master Router
This example shows how to configure a VRRP Master router.
Example: Configuring a VRRP Backup Router
object-number [decrement priority-decrement]
Example: VRRP Text Authentication
Page
Feature Information for HSRP and VRRP
Page
Configuring Link Layer Discovery Protocol
Restrictions for LLDP
Overview of LLDP
How to Configure LLDP
Configuring LLDP
Page
Verifying LLDP
Configuration Example for LLDP
Example: Enabling LLDP Globally
Example: Configuring Hold Time
28-5
Example: Configuring Delay Time
Example: Configuring Intervals
Page
Page
Feature Information for LLDP
Configuring Multihop Bidirectional Forwarding Detection
Restrictions for Multihop BFD
Information About Multihop BFD
Overview of Multihop BFD
How to Configure Multihop BFD
Configuring Multihop BFD Template
Page
Configuring a Multihop BFD Map
Configuration Examples for Multihop BFD
Example : Configuring Multihop BFD
29-5
Configuration for Router B
Page
Feature Information for Multihop BFD
Page
Bit Error Rate Testing
How to Configure BERT
Performing BERT on a T1/E1 Line
Terminating BERT on a T1/E1 Controller
Verifying BERT on a T1/E1 Controller
Page
Feature Information for Bit Error Rate Testing
Page
Page
Microwave ACM Signaling and EEM Integration
Page
Benefits
How to Configure Microwave ACM Signaling and EEM Integration
Configuring Connectivity Fault Management
Page
Page
Configuring EEP Applet Using CLIs
Page
Configuring Event Handler
Verifying Microwave Microwave ACM Signaling and EEM Integration Configuration
Configuration Examples for Microwave ACM Signaling and EEM Integration
Example: Configuring CFM
Example: Configuring EEP Applet
31-12
31-13
31-14
31-15
Example: Configuring Event Handler
The following is a sample configuration of Event Handler.
Page
Feature Information for Microwave ACM Signaling and EEM Integration
Page
IPv6 Support on the Cisco ASR 901 Router
Prerequisites for IPv6 Support on the Cisco ASR 901 Router
Restrictions for IPv6 Support on the Cisco ASR 901 Router
Information About IPv6 Support on the Cisco ASR 901 Router
Benefits
Overview of IPv6
IPv6 Address Formats
IPv6 Addressing and Discovery
Static Configuration
Stateless Autoconfiguration
ICMPv6
IPv6 Duplicate Address Detection
IPv6 Neighbor Discovery
IPv4 and IPv6 Dual-Stack on an Interface
Routing Protocols
IS-IS Enhancements for IPv6
OSPFv3 for IPv6
Multiprotocol BGP Extensions for IPv6
Bidirectional Forwarding Detection for IPv6
How to Configure IPv6 Support on the Cisco ASR 901 Router
Configuring IPv6 Addressing and Enabling IPv6 Routing
Page
Configuring a Static IPv6 Route
Enabling Stateless Auto-Configuration
Implementing IPv6 on VLAN Interfaces
Implementing IPv6 Addressing on Loopback Interfaces
Configuring ICMPv6 Rate Limiting
Configuring IPv6 Duplicate Address Detection
Configuring IPv6 Neighbor Discovery
Configuring IPv6 and IPv4 Dual-Stack on the Same VLAN
Configuring OSPFv3 for IPv6
Configuring IS-IS for IPv6
Page
Configuring Multiprotocol-BGP for IPv6
Configuring BFD for IPv6
Specifying a Static BFDv6 Neighbor
Associating an IPv6 Static Route with a BFDv6 Neighbor
Page
Configuring BFDv6 and OSPFv3
Configuring BFDv6 for BGP
Implementing QoS for IPv6
Verifying the Configuration of IPv6 Support on the Cisco ASR 901 Router
Verifying IPv6 Addressing Routing
32-28
Verifying a Static IPv6 Route
32-29
Verifying a Stateless Auto-Configuration
To verify the autoconfigured IPv6 address and its state, use the show ipv6 interface command in
Verifying IPv6 Implementation on VLAN Interfaces
To verify the IPv6 implementation on VLAN interfaces, use the show ipv6 interface command in
32-30
Verifying IPv6 Implementation on Loopback Interfaces
To verify the IPv6 implementation on loopback interfaces, use the show ipv6 interface command in
Verifying ICMPv6 Configuration
32-31
32-32
Verifying IPv6 Duplicate Address Detection Configuration
32-33
Verifying IPv6 Neighbor Discovery Configuration
To verify the IPv6 neighbor discovery configuration, use the show ipv6 neighbors command in
Verifying IPv6 and IPv4 Dual-Stack Configuration
32-34
Verifying OSPFv3 for IPv6 Configuration
32-35
Verifying IS-IS for IPv6 Configuration
To verify the IPv6 Addressing Routing information, use the show isis ipv6 rib command in privileged
Verifying Multiprotocol-BGP for IPv6 Configuration
32-36
32-37
Verifying BFD for IPv6 Configuration
To verify the IPv6 Addressing Routing information, use the show bfd neighbors command in privileged
32-38
Verifying BFDv6 and OSPFv3 Configuration
Verifying BFDv6 for BGP Configuration
Configuration Examples for IPv6 Support on the Cisco ASR 901
32-40
Example: IPv6 Addressing on VLAN Interfaces
The following is a sample configuration of IPv6 addressing on VLAN interfaces.
Example: IPv6 Addressing on Loopback Interfaces
The following is a sample configuration of IPv6 addressing on Loopback interfaces.
Example: Customizing ICMPv6
Example: Configuring IPv6 Neighborhood Discovery
The following is a sample configuration of IPv6 neighborhood discovery.
Example: Enabling IPv6 Stateless Address Autoconfiguration
The following is a sample configuration of IPv6 stateless address autoconfiguration.
Example: Configuring the IPv4 and IPv6 Dual-Stack
Example: Configuring BFD and Static Routing for IPv6
Example: Configuring OSPFv3 for IPv6
The following is a sample configuration of OSPFv3 for IPv6.
Example: Configuring BFD and OSPFv3 for IPv6
32-43
Example: Configuring IS-IS for IPv6
The following is a sample configuration of IS-IS for IPv6.
32-44
Example: Configuring Multiprotocol-BGP for IPv6
The following is a sample configuration of multiprotocol-BGP for IPv6.
32-45
Example: Configuring BFD and Multiprotocol-BGP for IPv6
Page
Page
Page
Feature Information for IPv6 Support on the Cisco ASR 901
Page
Page
Page
Labeled BGP Support
Overview of Labeled BGP Support
How to Configure Labeled BGP Support
Configuration Example for Labeled Support
33-4
Verifying Labeled BGP Support
To verify the Labeled BGP Support on the Cisco ASR 901 router, use the show commands given below:
33-5
To verify three Label Support, use the show ip cef vrf command as shown in the following example.
33-6
Page
Feature Information for Labeled BGP Support
MPLS Traffic Engineering - Fast Reroute Link Protection
Page
BFD-triggered Fast Reroute
R8 R1
R9 R5
R2 R3 R6 R7
BFD
How to Configure Traffic Engineering - Fast Reroute Link Protection
Enabling MPLS TE-FRR on an SVI Interface
Enabling MPLS TE-FRR for EoMPLS on a Global Interface
Page
Enabling MPLS TE-FRR for EoMPLS on an Interface
Page
Enabling MPLS TE-FRR for IS-IS
Page
Configuring Primary One-hop Auto-Tunnels
Page
Configuring Backup Auto-Tunnels
Enabling Targeted LDP session over Primary one-hop Auto-Tunnels
Enabling BFD Triggered FRR on an SVI Interface
Enabling BFD Triggered FRR on a Router
Verification Examples
Verifying MPLS TE-FRR Configuration
34-18
Use the following command to verify whether the LSPs are protected.
Use the following command to verify the backup tunnel information.
Use the following command to verify the reservation detail.
34-19
Verifying Primary One-hop Auto-Tunnels
Verifying Backup Auto-Tunnels
To verify the configuration of backup auto-tunnels, use the show commands as shown in the following
34-20
Verifying BFD Triggered FRR Configuration
To verify the configuration of BFD triggered FRR, use the show commands as shown in the following
34-21
Use the following command to verify whether the LSPs are protected:
34-22
Use the following command to verify the backup tunnel information.
34-23
Use this command to display the interface configuration for Hello.
Example: Configuring MPLS TE-FRR
Example: Configuring Primary One-hop Auto-Tunnels
Example: Configuring Backup Auto-Tunnels
Example: Configuring BFD Triggered FRR
Page
Page
Feature Information for MPLS Traffic Engineering - Fast Reroute Link Protection
Page
Layer 2 Control Protocol Peering, Forwarding, and Tunneling
Layer 2 Control Protocol Forwarding
Layer 2 Control Protocol Tunneling
4 4
CE CE
1 2 32 1
How to Configure Layer 2 Control Protocol Peering, Forwarding, and Tunneling
CE CE
1 2 32 1
ASR901 ASR901 PE
Configuring Layer 2 Peering
Configuring Layer 2 Forwarding
Page
Configuring Layer 2 Tunneling
Page
35-9
Verifying Layer 2 Peering
Verifying Layer 2 Forwarding
Verifying Layer 2 Tunneling
35-10
Example: Configuring Layer 2 Peering
The following is a sample configuration of layer 2 peering.
Example: Configuring Layer 2 Forwarding
The following is a sample configuration of layer 2 protocol forwarding at untagged EFP.
35-11
Example: Configuring Layer 2 Tunneling
The following is a sample configuration of layer 2 control protocol tunneling for untagged packets.
35-12
Cisco ASR 901 routers.
Router 1
Router 2
Page
Page
Feature Information for Layer 2 Control Protocol Peering, Forwarding, and Tunneling
Page
Configuring Inverse Muliplexing over ATM
How to Configure IMA
Configuring ATM IMA on T1/E1 Interface
Configuring ATM IMA over MPLS
Configuring the T1/E1 Controller
Configuring an ATM IMA Interface
Configuring ATM over MPLS Pseudowire Interface
Configuring a Port Mode Pseudowire
Configuring an N-to-1 VCC Cell Mode
Configuring an N-to-1 vPC Cell Mode
ATM AAL5 SDU VCC Transport
Verifying IMA Configurations
How to Configure ATM Class of Service
Configuring Constant Bit Rate
Configuring Unspecified Bit Rate
Configuring Unspecified Bit Rate Plus
Configuring Variable Bit Rate for Real/Non-Real Time Traffic
Configuration Examples
Example: Creating an IMA Interface
Example: Configuring a Port Mode Pseudowire
36-16
Example: Configuring an N-to-1 VCC Cell Mode
The following is a sample configuration of N-to-1 VCC cell mode:
The following is a sample configuration for AAL5 SDU mode:
Example: Configuring an N-to-1 VPC Cell Mode
The following is a sample configuration of N-to-1 Permanent Virtual Circuit (VPC) cell mode.
Configuring Marking MPLS Experimental Bits
Creating a Policy-map for PVP/PVC/ATM IMA Interface
Applying the Policy-map
Applying a Policy map on PVC and PVP
Page
Applying a Policy map on ATM IMA Interface
Creating a Table-map
Creating a Policy-map for SVI Interface
Applying a Service Policy on SVI Interface
Page
Page
Feature Information for Inverse Multiplexing over ATM
IPv6 over MPLS: 6PE and 6VPE
Page
Benefits of 6PE and 6VPE
IPv6 on Provider Edge Routers
IPv6 on VPN Provider Edge Routers
Components of MPLS-based 6VPE Network
Supported Features
Scalability Numbers
How to Configure IPv6 over MPLS: 6PE and 6VPE
Configuring 6PE
Page
Page
Configuring 6VPE
Setting up IPv6 Connectivity from PE to CE Routers
Setting up MP-BGP Peering to the Neighboring PE
Page
Setting up MPLS/IPv4 Connectivity with LDP
Creating IPv6 VRFs on PE Routers
Configuring IPv6-only VRF
Configuring Dual-stack VRF
Verifying IPv6 over MPLS: 6PE and 6VPE Configuration
37-16
37-17
37-18
To display output information linking the MPLS label with prefixes, use the following show command.
To display entries in the IPv6 BGP routing table, use the following show command:
Example: Configuring 6PE, page 37-18 Example: Configuring 6VPE, page 37-19
Example: Configuring 6PE
The following is a sample configuration of 6PE.
37-19
Example: Configuring 6VPE
The following is a sample configuration of 6VPE.
Page
Feature Information for IPv6 over MPLS: 6PE and 6VPE
Page
Storm Control
Configuring Storm Control
Page
Verifying Storm Control
Configuring Error Disable Recovery
38-6
Step 4
Monitoring Error Disable Recovery
seconds
Configures the period to recover from a specified error-disable cause.
secondsSpecifies the time to recover from a specified
error-disable cause.
Configuration Example for Storm Control
Page
Feature Information for Storm Control
Page
Remote Loop-Free Alternate - Fast Reroute
Page
Page
Benefits of Remote LFA-FRR
Avoiding Traffic Drops
Pseudowire Redundancy over FRR
Conditions for Switchover
How to Configure Remote Loop-Free Alternate - Fast Reroute
Configuring Remote LFA-FRR for IS-IS
Page
Page
Configuring Remote LFA-FRR for OSPF
Page
Configuring Remote LFA-FRR for Ethernet and TDM Pseudowires
Configuring Remote LFA-FRR on a Global Interface
Configuring Remote LFA-FRR on a GigabitEthernet Interface
Configuring Remote LFA-FRR on an SVI Interface
Configuring Remote LFA-FRR on IS-IS
Page
Page
Page
Configuring LFA-FRR for EoMPLS
Page
Configuring LFA-FRR for ATM/IMA
Page
Configuring LFA-FRR for CESoPSN
Page
Configuring LFA-FRR for SAToP
Page
Verification Examples for Remote LFA-FRR
39-28
Verifying Remote LFA-FRR Configuration
39-29
To display information for an IS-IS per-prefix LFA-FRR configuration, use the following show
To display entries in the CEF Forwarding Information Base (FIB) use the following show command.
39-30
To display information about IS-IS FRR configurations, use the following show command.
Verifying Remote LFA-FRR Configuration for EoMPLS on a GigabitEthernet Interface
39-31
39-32
Verifying Remote LFA-FRR Configuration for EoMPLS on an EVC Interface
39-33
Verifying Remote LFA-FRR Configuration on IS-IS
Verifying Remote LFA-FRR Configuration on ATM/IMA
39-34
Verifying Remote LFA-FRR Configuration on CESoPSN
Verifying Remote LFA-FRR Configuration on SAToP
Configuration Examples for Remote LFA-FRR
39-36
Example: Configuring Remote LFA-FRR for IS-IS
The following is a sample configuration of Remote LFA-FRR for IS-IS on all nodes.
Example: Configuring Remote LFA-FRR for OSPF
The following is a sample configuration of Remote LFA-FRR for OSPF on all nodes.
Example: Configuring Remote LFA-FRR Globally
Example: Configuring Remote LFA-FRR on a GigabitEthernet Interface
The following is a sample configuration of Remote LFA-FRR on a GigabitEthernet Interface.
Example: Configuring Remote LFA-FRR on an SVI Interface
The following is a sample configuration of Remote LFA-FRR on an SVI Interface.
Example: Configuring EoMPLS Pseudowire Redundancy over FRR
Example: Configuring LFA-FRR on CESoPSN
Example: Configuring LFA-FRR on SAToP
Page
Feature Information for Remote Loop-Free Alternate - Fast Reroute
Digital Optical Monitoring
How to Enable Transceiver Monitoring
Examples
Example: Displaying Transceiver Information
40-4
Example: Displaying Detailed Transceiver Information
This example shows how to display detailed transceiver information:
40-5
Example: Displaying List of Supported Transceivers
This example shows how to display the list of supported DOM transceivers:
40-6
Example: Displaying Threshold Tables
This example shows how to display the threshold tables for all transceivers on the ASR 901 router:
40-7
40-8
40-9
Example: Displaying Threshold Violations
Example: Displaying Threshold Violations on a Specific Interface
This example shows how to display violations for the transceiver on a specific interface:
Example: When Transceiver Monitoring is Disabled
This example shows how to disable transceiver monitoring for all transceivers:
Example: Displaying SPF Details
The following is the sample output from the show controller gig0/x command.
40-11
Page
Feature Information for Digital Optical Monitoring
Page
IPv4 Multicast
Page
Supported Protocols
PIM SSM for IPv4
Source Specific Multicast
Protocol Independent Multicast
PIM SSM Address Range
IGMP
IGMPv1
IGMPv2
IGMPv3
PIM SSM Mapping
Static SSM Mapping
Reverse Path Forwarding
Configuring IPv4 Multicast
Enabling IPv4 Multicast Routing
Configuring PIM SSM
Configuring PIM SSM Mapping
Verifying IPv4 Multicast Routing
Verifying PIM SSM
41-10
Verifying PIM SSM Mapping
Configuration Examples for IPv4 Multicast
41-12
Example: IPv4 Multicast Routing
Example: Configuring PIM SSM
The following is a sample configuration of PIM SSM on the Cisco ASR 901 router.
Example: Configuring PIM SSM Mapping
The following is a sample configuration of PIM SSM Mapping on the Cisco ASR 901 router.
Example: Configuring Rendezvous Point
Caution We suggest you do not use these debug commands without TAC supervision.
To display IGMP packets received and sent, use the following debug command.
Page
Page
Feature Information for IPv4 Multicast
Page
Page
IPv6 Multicast
Page
IPv6 Multicast Groups
IPv6 Multicast Routing Implementation
Multicast Listener Discovery Protocol for IPv6
Protocol Independent Multicast
PIM Source Specific Multicast
Source Specific Multicast Mapping for IPv6
PIM-Sparse Mode
Rendezvous Point
Configuring IPv6 Multicast
Enabling IPv6 Multicast Routing
Disabling IPv6 Multicast Forwarding
Disabling MLD Device-Side Processing
Configuring MLD Protocol on an Interface
Configuring a Rendezvous Point
Configuring PIM SSM Options
Disabling PIM SSM Multicast on an Interface
Configuring IPv6 SSM Mapping
Verifying IPv6 Multicast
42-14
To display the MLD interface specific parameters, use the show command described in the following
To display the MLD traffic counters, use the show command described in the following example.
To display interface specific information for PIM, use the show command described in the following
42-15
42-16
To display the number of PIM neighbors discovered, use the show command described in the following
To display PIM topology table for given group or all groups, use the show command described in the
42-17
To display information about the PIM register encapsulation and decapsulation tunnels, use the show
42-18
42-19
To display information about the various MRIB clients, use the show command described in the
42-20
To display summary information about the number of IPv6 MFIB entries and interfaces, use the show
Configuration Examples for IPv6 Multicast
Example: Enabling IPv6 Multicast Routing
Example: Configuring IPv6 SSM Mapping
Example: Configuring Rendezvous Point
Page
Page
Feature Information for IPv6 Multicast
Page
Page
Configuring Switched Port Analyzer
SPAN Limitations and Configuration Guidelines
Understanding SPAN
Overview
SPAN Session
Source Interface
Destination Interface
Traffic Types
SPAN Traffic
Configuring SPAN
Creating a SPAN Session
43-5
Step 5
Step 4
Removing Sources or Destination from a SPAN Session
Specifies the SPAN session number.
Specifies the destination interface.
Step 6
Enables the SPAN session using the no shutdown
Configuration Examples for SPAN
Verifying Local SPAN
43-7
The following is sample output from the show monitor session all detail command.
Page
Feature Information for Switched Port Analyzer
Page
INDEX
Numerics
A
B
C
Page
D
E
F
G
H
I
L
M
N
O
P
Q
R
S
T
V
Y