Manuals / Cabletron Systems / Computer Equipment / Network Router

Cabletron Systems SmartSwitch manual Tos-rewrite

Models: SmartSwitch

1 338

Download 338 pages 45.77 Kb

Page 290

Chapter 19: QoS Configuration Guide

The <tos> and <tos-mask>parameters use values ranging from 0 to 255. They are used in conjunction with each other to define which bit in the <tos> field of the packet is significant. The <tos-precedence-rewrite>value ranges from 0 to 7 and is the value that is rewritten in the ToS Precedence field (the first three bits of the ToS octet). The <tos-rewrite>value ranges from 0 to 31 and is the value that is rewritten in the ToS field (the last five bits of the ToS octet, which includes both the ToS field and the MBZ bit).

7	6	5	4	3	2	1	0
Precedence					ToS		MBZ

<tos-precedence-rewrite>					<tos-rewrite>
	0-7				0-31

The ToS byte rewrite is part of the QoS priority classifier group. The entire ToS byte can be rewritten or only the precedence part of the ToS byte can be rewritten. If you specify a value for <tos-precedence-rewrite>, then only the upper three bits of the ToS byte are changed. If you set <tos-precedence-rewrite>to any and specify a value for <tos-rewrite>, then the upper three bits remain unchanged and the lower five bits are rewritten. If you specify values for both <tos-precedence-rewrite>and <tos-rewrite>, then the upper three bits are rewritten to the <tos-precedence-rewrite>value and the lower five bits are rewritten to the <tos-rewrite>value.

For example, the following command will rewrite the ToS Precedence field to 7 if the ToS Precedence field of the incoming packet is 6:

ssr(config)# qos set ip tosp6to7 low any any any any 222 any any 224 7

In the above example, the <tos> value of 222 (binary value 1101 1110) and the <tos-mask>value of 224 (binary value 1110 0000) are ANDed together to specify the ToS Precedence field value of 6 (binary value 110). Changing the value in the <tos-mask>parameter determines the bit in the ToS octet field that will be examined.

The following example will rewrite the ToS Precedence and the ToS fields to 5 and 30 if the incoming packet is from the 10.10.10.0/24 network with the ToS Precedence field set to 2

290	SmartSwitch Router User Reference Manual

Image 290

Cabletron Systems SmartSwitch manual Tos-rewrite

Contents

SmartSwitch Router User Reference Manual 9032578-04SmartSwitch Router User Reference Manual Industry Canada Notice Vcci NoticeCabletron SYSTEMS, INC Program License Agreement SmartSwitch Router User Reference Manual SmartSwitch Router User Reference Manual SmartSwitch Router User Reference Manual Cabletron Systems Limited Program License Agreement SmartSwitch Router User Reference Manual Safety Information Laser Radiation and ConnectorsEC Directive 89/336/EEC EC Directive 73/23/EECSmartSwitch Router User Reference Manual Contents Hot Swapping Line Cards and Control Modules SmartTRUNK Configuration Guide Creating a non-IP/non-IPX VlanVrrp Configuration Guide 127 Multicast Routing Configuration Guide 199 IP Multicast Overview 199209 Web Hosting Configuration Guide 233 255 QoS Configuration Guide 283 WAN Configuration Guide 315 Contents About This Manual How to Use This ManualPreface Who Should Read This Manual?Preface Related Documentation Installing and setting up the SSRManaging the SSR using Cabletron’s For Information About SeePreface SmartSwitch Router User Reference Manual Chapter SSR Product Overview SSR Hardware and software specificationsFeature Specification IPX RIP, SAP Multicast IGMP, DvmrpSupported Media Encapsulation Type Supported Routing ProtocolsRouting Information Protocol RIP Version 1 Configuring the SmartSwitch RouterUnderstanding the Command Line Interface Common CLI key commands Basic Line Editing CommandsAccess Modes Key Sequence CommandUser Mode Enable Mode Exit Configure Mode Boot Prom Mode PvstBoot and System Image Loading System Images and Configuration FilesDisabling a Function or Feature Configuration FilesLoading System Image Software Ssr# system show versionEnter the system image list command to verify the change Loading Boot Prom SoftwareActivating the Configuration Commands in the Scratchpad Enter yes or y to activate the changes Copying the Configuration to the Startup Configuration FileCLI displays the following message Displaying Configuration Changes Managing the SSRConfiguring NTP Setting the SSR NameSetting SSR Date and Time Configuring DNS Configuring the SSR CLIConfiguring Snmp Services Connecting Between the SSR and Other Systems Configuring LoggingMonitoring Configuration Task CommandShow the configuration changes Show the SSR login bannerShow the type of Power-On Self Test Post Reboot Show the status of the switching fabricHot Swapping Line Cards Chapter Hot Swapping Line Cards Control ModulesHot Swapping Overview Deactivating the Line Card Removing the Line CardHot Swapping One Type of Line Card With Another Installing a New Line CardHot Swapping a Secondary Control Module Deactivating the Control Module Removing the Control ModuleHot Swapping a Switching Fabric Module SSR 8600 only Installing the Control ModuleSSR-SF-16 Offline Switching Fabric Spanning Tree Ieee 802.1d Chapter Bridging Configuration GuideBridging Overview Vlan Overview Bridging Modes Flow-Based and Address-BasedProtocol-based VLANs Port-based VLANsMAC-address-based VLANs Subnet-based VLANsPolicy-based VLANs SSR Vlan SupportMulticast-based VLANs VLANs and the SSRAccess Ports and Trunk Ports 802.1Q support Ports, VLANs, and L3 InterfacesExplicit and Implicit VLANs Configuring SSR Bridging FunctionsConfiguring Address-based or Flow-based Bridging Configuring Spanning Tree Address-Based Bridge Table Flow-Based Bridge TableMore ports for a particular Vlan Adjusting Spanning-Tree ParametersSetting the Bridge Priority Assigning Port Costs Setting a Port PriorityAdjusting Bridge Protocol Data Unit Bpdu Intervals Defining the Maximum Age Adjusting the Interval between Hello TimesDefining the Forward Delay Interval Configuring VLANs for Bridging Configuring a Port or Protocol based VlanConfiguring Vlan Trunk Ports Creating a Port or Protocol Based VlanConfiguring Layer-2 Filters Monitoring BridgingCreating a non-IP/non-IPX Vlan Configuration ExamplesCreating an IP or IPX Vlan Show information on MACsPage Chapter SmartTRUNK Configuration Guide OverviewAdd Physical Ports to the SmartTRUNK Configuring SmartTRUNKsCreating a SmartTRUNK Monitoring SmartTRUNKs Specify Traffic Distribution Policy OptionalExample Configurations St.2 St.4 Router Switch ServerSmartTRUNK Configuration Guide Page Dhcp Overview Configuration GuideChapter Configuring Client Parameters Configuring DhcpConfiguring an IP Address Pool Client ParametersConfiguring a Static IP Address Grouping Scopes with a Common InterfaceMonitoring the Dhcp Server Configuring Dhcp Server ParametersUpdating the Lease Database Define an IP address pool for addresses 10.1.1.10 through Dhcp Configuration ExamplesDefine Dhcp network parameters for the scope ‘scope1’ Define a static IP address forConfiguring Secondary Subnets Secondary Subnets and Directly-Connected Clients Include ‘scope2’ in the superscope ‘super1’Interacting with Relay Agents Define the address pool for ‘scope1’ Page Chapter IP Routing Configuration Guide IP Routing OverviewUnicast Routing Protocols IP Routing ProtocolsSSR supports standards-based TCP, UDP, and IP Multicast Routing ProtocolsConfiguring IP Interfaces for a Vlan Configuring IP Interfaces and ParametersConfiguring IP Addresses to Ports Specifying Ethernet Encapsulation MethodConfiguring Proxy ARP Configuring Address Resolution Protocol ARPConfiguring ARP Cache Entries Defining MAC-to-IP Address Mappings Configuring Reverse Address Resolution Protocol RarpSpecifying IP Interfaces for Rarp Monitoring Rarp Configuring DNS ParametersConfiguring IP Services Icmp Specify pingConfiguring Denial of Service DOS Configuring IP HelperConfiguring Direct Broadcast Configuring Router Discovery Monitoring IP ParametersAssigning IP/IPX Interfaces IP Routing Configuration Guide Configuring Vrrp Vrrp OverviewConfiguration of Router R1 Basic Vrrp ConfigurationBackup Following is the configuration file for Router R1 in FigureFollowing is the configuration file for Router R2 in Figure Symmetrical ConfigurationConfiguration for Router R2 Master for VRID=1 Master for VRID=2 Backup for VRID=2 Symmetrical Vrrp ConfigurationMulti-Backup Configuration Configuration of Router R2Multi-Backup Vrrp Configuration SmartSwitch Router User Reference Manual 101 Virtual Router Default Priority Configured Priority Following is the configuration file for Router R3 in Figure Additional ConfigurationConfiguration of Router R3 Setting Pre-empt Mode Setting the Backup PrioritySetting the Advertisement Interval Ip-redundancy trace Setting an Authentication KeyMonitoring Vrrp Virtual routers Display information about all Vrrp Configuration NotesIp-redundancy show Specific virtual routerSmartSwitch Router User Reference Manual 107 108 RIP Overview Chapter RIP Configuration GuideConfiguring RIP Enabling and Disabling RIP Configuring RIP InterfacesConfiguring RIP Parameters To RIP Set the authentication methodCharacters Set the authentication method Specify that RIP V2 packetsMonitoring RIP Configuring RIP Route PreferenceConfiguring RIP Route Default-Metric Configuration Example 114 Ospf Ospf OverviewDisable Ospf Configuring OspfEnable Ospf Ospf MultipathOspf Interface Parameters Configuring Ospf Interface ParametersOspf Parameter Default Value Add an interface to an Ospf area Configuring an Ospf AreaCreate an Ospf area Add a stub host to an Ospf area Configuring Ospf Area ParametersCreating Virtual Links Add a network to an Ospf area forLink Configuring Ospf over Non-Broadcast Multiple AccessCreate a virtual Set virtual linkMonitoring Ospf Ospf Configuration Examples Exporting All Interface & Static Routes to Ospf Exporting All RIP, Interface & Static Routes to OspfCreate a RIP export source Create a Ospf export destination for type-1 routesCreate a Ospf export destination for type-2 routes Create a Static export sourceCreate OSPF-ASE export source Create a RIP export destinationCreate Ospf export source R10 Chapter BGP Configuration Guide BGP OverviewBasic BGP Tasks SSR BGP ImplementationConfiguring a BGP Peer Group Setting the Autonomous System NumberSetting the Router ID Ip-router global set autonomous-system num1 loops num2Where Autonomous-system numberStarting BGP Using AS-Path Regular ExpressionsAdding and Removing a BGP Peer 132 To import MCI routes with a preference Using the AS Path Prepend FeatureAS-Path Regular Expression Examples BGP Configuration Examples Following is an exampleBGP Peering Session Example Physical Link Peering Relationship CLI configuration for router SSR1 is as followsAS-1 AS-2 Gated.conf file for router SSR1 is as follows Ibgp Configuration ExampleCLI configuration for router SSR2 is as follows Gated.conf file for router SSR2 is as followsIbgp Routing Group Example Sample Ibgp Configuration Routing Group Type AS-64801Following lines in the Cisco router configure Ospf Ibgp Internal Group Example Illustrates a sample Ibgp Internal group configuration Sample Ibgp Configuration Internal Group TypeSmartSwitch Router User Reference Manual 143 Configuration for router C2 a Cisco router is as follows Ebgp Multihop Configuration ExampleConfiguration for router C1 a Cisco router is as follows AS-64800 Physical LinkCLI configuration for router SSR3 is as follows Gated.conf file for router SSR3 is as follows CLI configuration for router SSR4 is as followsCommunity Attribute Example Gated.conf file for router SSR4 is as followsSample BGP Configuration Specific Community Sample BGP Configuration Well-Known Community , router SSR11 has the following configuration , router SSR13 has the following configuration , router SSR10 has the following configuration , router SSR14 has the following configurationSmartSwitch Router User Reference Manual 153 LocalPref Attribute Example Sample BGP Configuration LocalPref Attribute Multi-Exit Discriminator Attribute Example Sample BGP Configuration MED Attribute Router SSR6 has the following CLI configurationAS-64900 Router SSR8 has the following CLI configurationEbgp Aggregation Example AS-64901Router SSR9 has the following CLI configuration Route Reflection ExampleShows a sample configuration that uses route reflection AS-64902SmartSwitch Router User Reference Manual 161 162 Chapter Routing Policy Configuration Guide Route Import and Export Policy OverviewPreference Default Preference ValuesPreference Defined by CLI Command Default Import Policies Import-SourceExport-Destination Export PoliciesRoute-Filter Export-SourceSpecifying a Route Filter Aggregates and Generates Aggregate-Destination Aggregate-SourceAuthentication Authentication MethodsConfiguring Simple Routing Policies Authentication Keys and Key ManagementRedistributing Static Routes Redistributing Directly Attached NetworksRedistributing Aggregate Routes Redistributing RIP into RIPRedistributing RIP into Ospf Redistributing Ospf to RIP Routes into Ospf Simple Route Redistribution ExamplesTo redistribute aggregate Example 1 Redistribution into RIPExample 2 Redistribution into Ospf Exporting a Given Static Route to All RIP InterfacesExporting All Static Routes to All RIP Interfaces 176 Configuring Advanced Routing Policies 178 Creating an Export Destination Creating an Export SourceCreating an Aggregate Route Creating an Import SourceCreating a Route Filter Create a RIP importSmartSwitch Router User Reference Manual 181 Examples of Import Policies Creating an Aggregate DestinationCreating an Aggregate Source Example 1 Importing from RIPR41 184 Example 2 Importing from Ospf 186 R41 Importing a Selected Subset of OSPF-ASE Routes Examples of Export Policies Example 1 Exporting to RIPIp-router policy create rip-export-source ripExpSrc Exporting a Given Static Route to a Specific RIP Interface Exporting Aggregate-Routes into RIP Ip-router policy create aggr-export-source aggrExpSrc Example 2 Exporting to Ospf SmartSwitch Router User Reference Manual 195 196 SmartSwitch Router User Reference Manual 197 198 Igmp Overview Chapter Multicast Routing Configuration GuideIP Multicast Overview Dvmrp Overview Configuring Igmp Query Interval Configuring IgmpConfiguring Igmp on an IP Interface Configuring Igmp Response Wait TimeStarting and Stopping Dvmrp Configuring DvmrpConfiguring Per-Interface Control of Igmp Membership Configuring the Dvmrp Routing Metric Configuring Dvmrp on an InterfaceConfiguring Dvmrp Parameters Configuring Dvmrp TTL & Scope Configuring a Dvmrp TunnelMonitoring Igmp & Dvmrp Show all multicast routes Show all interfaces runningMulticast protocols Igmp Page 208 Chapter IP Policy-Based Forwarding Configuration Guide Associating the Profile with an IP Policy Configuring IP PoliciesDefining an ACL Profile Creating Multi-statement IP Policies Setting Load Distribution for Next-hop Gateways Setting the IP Policy ActionApplying an IP Policy to an Interface Checking the Availability of Next-hop GatewaysAn IP interface Apply a defined IP policy to IP Policy Configuration ExamplesRouting Traffic to Different ISPs All IP interfaces on the SSRUsing an IP policy to route traffic to two different ISPs Prioritizing Service to Customers Using an IP policy to prioritize service to customersAuthenticating Users through a Firewall Using an IP policy to authenticate users through a firewallFirewall Load Balancing Selecting Next Hop Gateway from IP Packet InformationIP policies Monitoring IP PoliciesDisplay information about all Display statistics about aIp-policy show interface interface SmartSwitch Router User Reference Manual 221 222 Chapter Network Address Translation Configuration Guide Configuring NAT Setting Inside and Outside InterfacesStatic Setting NAT RulesManaging Dynamic Bindings DynamicNAT and FTP Static ConfigurationSpecify the FTP session timeout Monitoring NATNext, define the interfaces to be NAT inside or outside Using Static NATFirst step is to create the interfaces Then, define the NAT static rulesDynamic Configuration Using Dynamic NATDynamic NAT with IP Overload PAT Configuration Using Dynamic NAT with IP Overload Dynamic NAT with Outside Interface RedundancyUsing Dynamic NAT with Matching Interface Redundancy 232 Chapter Web Hosting Configuration Guide Creating the Server Group Configuring Load BalancingLoad Balancing Specifying Load Balancing Policy OptionalSetting Server Status Adding Servers to the Load Balancing GroupLoad Balancing and FTP Allowing Access to Load Balancing ServersSetting Timeouts for Load Balancing Mappings Configuration Examples Displaying Load Balancing InformationFtp.quick.com Internet Router User Queries 207.135.89.16 10.1.1.1 Ftp.quick..com 10.1.1.2Virtual IP Address Ranges 207.135.89.16 207.135.89.17 207.135.89.18Configuring Web Caching Web CachingRedirected to cache servers Creating the Cache GroupSpecifying the Clients for the Cache Group Optional Not redirected to cache serversBypassing Cache Servers Configuration ExampleOther Configurations Proxy Server Redundancy Distributing Frequently-Accessed Sites Across Cache ServersMonitoring Web-Caching Show caching policy information Show cache server informationRIP Routing Information Protocol Chapter IPX Routing Configuration GuideIPX Routing Overview SAP Service Advertising Protocol IPX Addresses Configuring IPX RIP & SAPCreating IPX Interfaces Configuring IPX Interfaces for a Vlan Configuring IPX Interfaces and ParametersConfiguring IPX Addresses to Ports Specifying IPX Encapsulation MethodEnabling IPX RIP Configuring IPX RoutingConfiguring Static Routes Enabling SAPCreating an IPX Access Control List Configuring Static SAP Table EntriesControlling Access to IPX Networks Creating an IPX GNS Access Control List Creating an IPX Type 20 Access Control ListCreating an IPX SAP Access Control List Creating an IPX RIP Access Control List Monitoring an IPX NetworkAdds a SAP access list Adds a GNS access list 254 Chapter Access Control List Configuration Guide ACL Basics Defining Selection Criteria in ACL RulesHow ACL Rules are Evaluated Implicit Deny Rule Allowing External Responses to Established TCP Connections Editing ACLs Offline Following ACL illustrates this featureCreating and Modifying ACLs Maintaining ACLs Using the ACL Editor These uses of ACLs are described in the following sections Using ACLsApplying ACLs to Interfaces Applying ACLs to Services Using ACLs as ProfilesUsing Profile ACLs with the IP Policy Facility Following SSR features use ACL profilesSSR Feature ACL Profile Usage Using Profile ACLs with the Traffic Rate Limiting Facility Using Profile ACLs with Dynamic NAT Using Profile ACLs with the Port Mirroring FacilityUsing Profile ACLs with the Web Caching Facility Redirecting Http Traffic to Cache ServersEnabling ACL Logging Preventing Web Objects From Being CachedMonitoring ACLs 270 Chapter Security Configuration Guide Security OverviewConfiguring SSR Access Security Configuring RadiusMonitoring Tacacs Configuring TacacsMonitoring Radius Configuring Tacacs Plus Monitoring Tacacs PlusConfiguring Passwords Layer-2 Security FiltersConfiguring Layer-2 Address Filters Configuring Layer-2 Port-to-Address Lock FiltersConfigure a source static Configuring Layer-2 Static Entry FiltersConfiguring Layer-2 Secure Port Filters Configure a destination staticMonitoring Layer-2 Security Filters Static Entries Example Layer-2 Filter ExamplesEt.1.1 Et.1.2 Et.1.3 Hub Port-to-Address Lock Examples Example 2 Secure PortsLayer-3 Access Control Lists ACLs 282 Chapter QoS Configuration Guide QoS & Layer-2/Layer-3/Layer-4 Flow OverviewLayer-2 and Layer-3 & Layer-4 Flow Specification Precedence for Layer-3 FlowsSSR Queuing Policies Configuring Layer-2 QoSTraffic Prioritization for Layer-2 Flows Configuring IP QoS Policies Traffic Prioritization for Layer-3 & Layer-4 FlowsSetting an IPX QoS Policy Configuring IPX QoS PoliciesSetting an IP QoS Policy Specifying Precedence for an IP QoS PolicyToS Rewrite Configuring SSR Queueing PolicyAllocating Bandwidth for a Weighted-Fair Queuing Policy Specifying Precedence for an IPX QoS PolicyConfiguring ToS Rewrite for IP Packets MBZTos-rewrite Show all IP QoS flows Monitoring QoSLimiting Traffic Rate Show all IPX QoS flowsApply a rate limit profile to an Example ConfigurationDefine a rate limit profile InterfaceDisplaying Rate Limit Information Interface interface294 Chapter Performance Monitoring Guide Performance Monitoring OverviewMAC table Show information about a Show port error statisticsShow information about the master Particular MAC address Show info about multicastsOnly IP ACLs can be specified for port mirroring Configuring the SSR for Port MirroringMonitoring Broadcast Traffic 298 Configuring and Enabling Rmon Rmon OverviewExample of Rmon Configuration Commands Rmon Groups Lite Rmon GroupsStandard Rmon Groups Professional Rmon GroupsControl Tables Using Rmon Configuring Rmon Groups String status enabledisable EnabledisableNum status enabledisable Size owner string status enabledisableRmon protocol-distribution index index-number Port port owner string status enabledisableOid type absolutedelta status enabledisable Rmon user-history-control index index-numberDisplaying Rmon Information Rmon CLI Filters Following shows Host table output without a CLI filter 01000CCCCCCCCreating Rmon CLI Filters Troubleshooting RmonUsing Rmon CLI Filters 312 Allocating Memory to Rmon Ssr# rmon show status Rmon StatusRmon set memory number WAN WAN OverviewStatic, Mapped, and Dynamic Peer IP/IPX Addresses Configuring WAN InterfacesPrimary and Secondary Addresses Static AddressesMapped Addresses Following command line displays an example for a VlanFollowing command line displays two examples for PPP Dynamic AddressesPacket Compression Following command line displays an example for PPPForcing Bridged Encapsulation Nature of the Data Example ConfigurationsAverage Packet Size Link IntegrityWAN Quality of Service Packet EncryptionCongestion Management Weighted-Fair QueueingSource Filtering and ACLs Random Early Discard REDAdaptive Shaping Frame Relay OverviewVirtual Circuits Configuring Frame Relay Interfaces for the SSR Permanent Virtual Circuits PVCsSetting up a Frame Relay Service Profile Applying a Service Profile to an Active Frame Relay WAN PortFrame Relay Port Configuration Monitoring Frame Relay WAN Ports326 Use of LCP Magic Numbers Configuring PPP InterfacesPoint-to-Point Protocol PPP Overview Setting up a PPP Service Profile Defining the Type and Location of a PPP InterfaceCompression on MLP Bundles or Links Applying a Service Profile to an Active PPP PortConfiguring Multilink PPP Bundles PPP Port Configuration Monitoring PPP WAN PortsSsrconfig# ppp apply service profile2 ports hs.5.1 WAN Configuration Examples Simple Configuration FileMulti-Router WAN Configuration Multi-router WAN configurationRouter R2 Configuration File Router R1 Configuration FileFollowing configuration file applies to Router R1 Following configuration file applies to Router R2Router R4 Configuration File Router R3 Configuration FileFollowing configuration file applies to Router R3 Following configuration file applies to Router R4Router R6 Configuration File Router R5 Configuration FileFollowing configuration file applies to Router R5 Following configuration file applies to Router R6SmartSwitch Router User Reference Manual 337 338