Cisco Systems 8540 CSR Configuring Sonet Framing, Stm-1, Routerconfig-if# atm sonet, Stm-4

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Chapter 4 Configuring Interfaces

Configuring the ATM Uplink Interface (Catalyst 8540)

Note The ATM uplink supports IP unicast and IP multicast fragmentation. For IP unicast fragmentation, the packet must ingress on a ATM interface and egress on any interface. For IP multicast fragmentation, IP multicast data packets greater than 1500 bytes are fragmented to 1500 bytes on the ingress ATM interface before being switched to other members in the multicast group. All the members in the multicast group must have a MTU equal to or greater than 1500 bytes.

Configuring SONET Framing

In STM-1 mode or STM-4 mode, the ATM uplink interface sends idle cells for cell-rate decoupling. In STS-3c mode or STS-12c mode, the interface sends unassigned cells for cell-rate decoupling. STS-3c is the default SONET framing mode for the ATM OC-3c uplink interface; STS-12c is the default SONET framing mode for the ATM OC-12c uplink interface.

To configure the SONET framing mode, perform the following steps, beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

Router(config)# interface atm

Enters interface configuration mode and specifies the ATM

 

slot/subslot/interface

interface to configure.

 

Router(config-if)#

 

Step 2

 

 

Router(config-if)# atm sonet

Configures the SONET framing mode to STM-1 (for the OC-3c

 

stm-1

ATM interface) or to STM-4 (for the OC-12c interface).

 

or

 

 

Router(config-if)# atm sonet

 

 

stm-4

 

Step 3

 

 

Router(config-if)# no shutdown

Enables the interface with the previous configuration.

 

 

 

To return the SONET framing mode to the default, use the no form of the atm sonet command.

Configuring SONET Overhead

You can use the sonet overhead command to set the SONET overhead bytes in the frame header to meet a specific standards requirement or to ensure interoperability of the ATM uplink interface with another vendor's equipment. You can use the no form of this command to restore default values.

 

 

Layer 3 Switching Software Feature and Configuration Guide

 

 

 

 

 

 

 

78-6235-04, Cisco IOS Release 12.0(10)W5(18)

 

 

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Contents Configuring Interfaces Media Access Control Address Overview of Interface ConfigurationInterface Port Identifier Router# configure terminal General Instructions for Configuring InterfacesRouterconfig# interface gigabitethernet 1/0/1 About Layer 3 Switching Interfaces Example Initially Configuring Gigabit Ethernet InterfacesCommand Purpose About the Enhanced Gigabit Ethernet Interfaces CatalystVerifying the Ethernet Interface Configuration Initially Configuring Fast Ethernet InterfacesCommand Description Router# show interface gigabitethernet 0/0/0 ExamplesRouter# show interface fastethernet 1/0/0 About Virtual LANs Configuring ISL Vlan EncapsulationRouterconfig# bridge bridge-group protocol ieee Enters subinterface configuration modeRouterconfig-subif# Configure the Fast Ethernet main interface Routerconfig-if#Routerconfig-subif#interface fastethernet 3/0/1 Configuring 802.1Q Vlan EncapsulationRouterconfig# interface fastethernet 1/0/1.1 Routerconfig-subif#interface fastethernet 1/0/0Ieee Bridge-groupAbout Packet over Sonet Catalyst Monitoring Vlan OperationPOS About the POS OC-12c Uplink InterfaceConfiguring the POS OC-12c Uplink Interface Catalyst Initially Configuring the POS Interface Default ConfigurationParameter Configuration Command Default Value Line internal Automatic Reverting of Clock SourceIp-address subnet-mask Hdlc pppAdditional Configurations Customizing the ConfigurationSetting the MTU Size Value j0 value sls0 value Configuring FramingConfiguring Sonet Overhead Sdh sonetScrambling is on by default Configuring POS SPE ScramblingScramble-atm Configuring Sonet Alarms Alarm Configuring Sonet Delay TriggersAlarm Description Triggers line path millisecond Verifying the POS ConfigurationLais pais plop prdi slof SlosRouter# show protocols pos 1/0/0 LOP = PLM-P Router# show controllers pos 2/0/0Router# show controller pos 2/0/0 detail Smdr About the ATM Uplink Interface About ATM Uplinks CatalystNo atm sonet stm-1 for OC-3 Configuring the ATM Uplink Interface CatalystConfiguration Overview No loopbackParameter Value Initially Configuring the ATM Uplink InterfaceNo atm clock internal Atm vc-per-vpConfiguring the Clock Source ATM interface or to STM-4 for the OC-12c interface Configuring Sonet FramingRouterconfig-if# atm sonet Stm-1Line msg line 64byte exp-msg Overhead c2 byte j0 bytesMsg line j1 16byte exp-msg Sls0 is part of the payload pointer byteConfiguring Loopback Creating a PVC Configuring Virtual CircuitsConfiguring CDP Configuring the Maximum VCs per VPName Mapping a Protocol Address to a PVCVpi vci aal-encap Ip-address atm-vc vcdSwitch Router a Verifying the ATM ConfigurationSwitch Router B 5CB About Port Snooping Configuring Interfaces About Port SnoopingAbout the Snooping Source Port Configuring SnoopingRestrictions on Port Snooping About the Snooping Destination PortSource-port Direction receive transmit bothShow snoop Monitoring SnoopingShow snoop interface Destination-port78-6235-04, Cisco IOS Release 12.010W518
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