IS-IS Support for an IS-IS Instance per VRF for IP [Cisco IOS and NX-OS Software]

Table Of Contents

IS-IS Support for an IS-IS Instance per VRF for IP

Contents

Prerequisites for IS-IS Support for an IS-IS Instance per VRF for IP

Restrictions for IS-IS Support for an IS-IS Instance per VRF for IP

Information About IS-IS Support for an IS-IS Instance per VRF for IP

VRF-Aware IS-IS

IS-IS Support for an IS-IS Instance per VRF for IP Feature Operation

How to Configure IS-IS Support for an IS-IS Instance per VRF for IP

Creating a VRF

Prerequisites

Attaching an Interface to the VRF

Creating VRF Aware IS-IS Instances

Prerequisites

Creating a VRF-Aware IS-IS Instance in Interface Configuration Mode

Creating a VRF-Aware IS-IS Instance in Router Configuration Mode

Configuration Examples for IS-IS Support for an IS-IS Instance per VRF for IP

Configuring Multiple VRF-Aware IS-IS Instances: Example

Creating an IS-IS Instance Without a Process Tag: Example

Redistributing Routes from an IS-IS Instance: Example

Changing the Interface Ownership: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP

IS-IS Support for an IS-IS Instance per VRF for IP

First Published: August 09, 2004

Last Updated: May 5, 2008

This feature provides multiple VPN routing and forwarding (VRF)-aware Intermediate System-to-Intermediate System (IS-IS) instances. The VRF functionality allows Internet service providers (ISPs) to separate routing protocol information and propagate it to the appropriate routing table and network neighbors. Using one router with VRF functionality is more cost-effective than using separate routers to separate and forward the routing information.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Prerequisites for IS-IS Support for an IS-IS Instance per VRF for IP

•Restrictions for IS-IS Support for an IS-IS Instance per VRF for IP

•Information About IS-IS Support for an IS-IS Instance per VRF for IP

•How to Configure IS-IS Support for an IS-IS Instance per VRF for IP

•Configuration Examples for IS-IS Support for an IS-IS Instance per VRF for IP

•Additional References

•Command Reference

•Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP

Prerequisites for IS-IS Support for an IS-IS Instance per VRF for IP

•It is presumed that you are running IS-IS on your network.

•The VRF configuration is a prerequisite to associating an IS-IS instance with that specific VRF. However, the VRF configuration is independent of associating it with IS-IS or any other routing protocol. An IS-IS instance cannot be referred to as being VRF-aware until it has been associated with a particular VRF.

Restrictions for IS-IS Support for an IS-IS Instance per VRF for IP

IS-IS VRF support is supported only for IPv4.

When you configure the IS-IS Support for an IS-IS Instance per VRF for IP feature, you must comply with the following nine best practices guidelines:

•IS-IS instances running Connectionless Network Services (CLNS) must have the same system ID.

•An IS-IS instance that is running CLNS or IPv6 cannot be associated with a VRF.

•You can configure only one IS-IS instance to run both CLNS and IP.

•IS-IS instances within the same VRF must have unique system IDs, although IS-IS instances located in separate VRFs can have the same system ID.

•You can associate an IS-IS instance with only one VRF.

•You can configure the passive-interface default command only on one IS-IS instance per VRF.

•Redistribution is allowed only within the same VRF.

•You can enable only one IS-IS instance per interface.

•An interface can belong to an IS-IS instance only if they are associated with the same VRF.

Note If you are using LDP, you cannot use the route-target command when configuring a VRF. The router will use BGP for Multiprotocol Label Switching (MPLS) labels.

Information About IS-IS Support for an IS-IS Instance per VRF for IP

This section contains the following information:

•VRF-Aware IS-IS

•IS-IS Support for an IS-IS Instance per VRF for IP Feature Operation

VRF-Aware IS-IS

You can configure IS-IS to be VRF-aware. A VRF consists of an IP routing table, a derived Cisco Express Forwarding (CEF) table, a set of interfaces that use the forwarding table, and a set of rules and routing protocol parameters that control the information that is included in the routing table.

IS-IS Support for an IS-IS Instance per VRF for IP Feature Operation

ISPs have the capability to create multiple VRF-aware IS-IS instances that run on one router, rather than requiring duplicate hardware. IS-IS can be enabled to be VRF-aware, and ISPs can use multiple VRF-aware IS-IS instances to separate customer data while propagating the information to appropriate service providers.

For example, an ISP can create three VRFs—VRF First, VRF Second, and VRF Third—to represent three separate customers. A VRF-aware IS-IS instance is created and associated with each VRF: tagFIRST, tagSECOND, and tagTHIRD. Each instance will have its own routing process, IS-IS database, and routing table, and will calculate its own shortest path first (SPF) tree.

How to Configure IS-IS Support for an IS-IS Instance per VRF for IP

This section contains the following procedures:

•Creating a VRF (required)

•Attaching an Interface to the VRF (required)

•Creating VRF Aware IS-IS Instances (required)

Creating a VRF

This tasks creates a VRF.

Prerequisites

•It is presumed that you have IS-IS running on your network.

•If CEF is not enabled by default on your platform, you will need to enable CEF in order to associate interfaces with VRF-aware IS-IS instances.

SUMMARY STEPS

1. enable

2. configure terminal

3. ip cef [distributed]

4. ip vrf vrf-name

5. rd route-distinguisher

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

ip cef [distributed]
Example:

Router(config)# ip cef distributed

Enables CEF on the Route Processor card.

•If CEF is not enabled by default on your particular platform, you must configure it with the ip cef command.

Step 4

ip vrf vrf-name
Example:

Router(config)# ip vrf first

Configures a VRF routing table, and enters VRF configuration mode.

Step 5

rd route-distinguisher
Example:

Router(config-vrf)# rd 1:1

Creates routing and forwarding tables for a VRF.

Attaching an Interface to the VRF

This task associates an interface with the VRF.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface type number

4. ip vrf forwarding vrf-name

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

interface type number
Example:

Router(config)# interface FastEthernet 0/2

Configures an interface type and enters interface configuration mode.

Step 4

ip vrf forwarding vrf-name
Example:

Router(config-if)# ip vrf forwarding vrffirst

Associates a VPN routing and forwarding instance (VRF) with an interface or subinterface.

Creating VRF Aware IS-IS Instances

The tasks in these sections create VRF-aware IS-IS instances. You can create VRF-aware IS-IS instances either in interface configuration mode or in router configuration mode. Perform the tasks described in one of the following two sections to create one or more instances:

•Creating a VRF-Aware IS-IS Instance in Interface Configuration Mode

•Creating a VRF-Aware IS-IS Instance in Router Configuration Mode

Prerequisites

Before you create VRF-aware IS-IS instances, you need to enable IP routing on the router.

Note Only one instance within the VRF can be configured as the passive interface default.

Creating a VRF-Aware IS-IS Instance in Interface Configuration Mode

This task creates a VRF-aware IS-IS instance in interface configuration mode.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface type number

4. ip address ip-address mask [secondary]

5. ip router isis process-tag

6. no shutdown

7. end

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

interface type number
Example:

Router(config)# interface FastEthernet 0/2

Configures an interface type and enters interface configuration mode.

Step 4

ip address ip-address mask [secondary]
Example:

Router(config-if)# ip address 172.16.11.1 255.255.255.255

Sets a primary or secondary IP address for an interface.

Step 5

ip router isis process-tag
Example:

Router(config-if)# ip router isis tagfirst

Configures an IS-IS routing process for IP on an interface and attaches a tag to the routing process.

•A new IS-IS instance with the process tag tagfirst will be created and will be displayed when you enter the show running-config command. (It is presumed that the VRF called vrffirst was already configured on the router as in the, "Creating a VRF" section.)

Note The configuration of the interface-mode ip router isis command will overwrite the prior configuration on that interface, but only if the new configuration is attempting to change the interface ownership to a different instance that is in the same VRF as the currently configured owner instance. The configuration will be rejected if the attempted change is between two instances that are associated with different VRFs.

Step 6

no shutdown
Example:

Router(config-if)# no shutdown

Restarts a disabled interface.

Step 7

end
Example:

Router(config-if)# end

Exits interface configuration mode.

Creating a VRF-Aware IS-IS Instance in Router Configuration Mode

This task creates a VRF-aware IS-IS instance in router configuration mode.

SUMMARY STEPS

1. enable

2. configure terminal

3. router isis process-tag

4. vrf vrf-name

5. net network-entity-title

6. end

DETAILED STEPS

Command or Action

Purpose

Step 1

enable
Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2

configure terminal
Example:

Router# configure terminal

Enters global configuration mode.

Step 3

router isis process-tag
Example:

Router(config-if)# router isis tagFirst

Enables the IS-IS routing protocol, specifies an IS-IS process, and enters router configuration mode.

•It is presumed that the VRF named First was previously created.

Step 4

vrf vrf-name
Example:

Router(config-router)# vrf first

Associates an IS-IS instance with a VRF.

Step 5

net network-entity-title
Example:

Router(config-router)# net 49.000b.0000.0001.0002.00

Configures an IS-IS NET for a CLNS routing process.

Step 6

end
Example:

Router(config-router)# end

Exits router configuration mode.

Configuration Examples for IS-IS Support for an IS-IS Instance per VRF for IP

This section provides the following configuration examples:

•Configuring Multiple VRF-Aware IS-IS Instances: Example

•Creating an IS-IS Instance Without a Process Tag: Example

•Redistributing Routes from an IS-IS Instance: Example

•Changing the Interface Ownership: Example

Configuring Multiple VRF-Aware IS-IS Instances: Example

In the following example, the VRF Second is created and an IS-IS instance is created explicitly by entering the router isis command on the router:
Router(config)# ip cef distributed
Router(config)# ip routing
Router(config)# ip vrf Second
Router(config-vrf)# rd 1:1
Router(config-if)# router isis tagSecond
Router(config-router)# vrf Second
Router(config-router)# net 49.000b.0000.0001.0002.00
The VRF Third is created and a VRF-aware IS-IS instance is automatically created when the ip router isis command is entered:
Router(config)# ip vrf Third
Router(config-vrf)# rd 1:1
Router(config-if)# interface FastEthernet0/2
Router(config-if)# ip vrf forwarding Third
Router(config-if)# ip address 172.16.10.1 255.255.255.0
Router(config-if)# ip router isis tagThird
Router(config-if)# no shutdown
A new IS-IS instance with the process tag tagThird will automatically be created and associated with the VRF Third. When the show running-config command is entered, the following information for the new IS-IS instance will be displayed:
Router# show running-config
Building configuration...
router isis tagThird
 vrf Third
Router(config)# router isis tagThird
Router(config-router)# net 49.000b.0000.0001.0001.00
The following sample output verifies information for the VRF-aware IS-IS instances that were created in the previous examples:
Router# show isis tagThird topology
Tag tagThird:
IS-IS paths to level-2 routers
System Id             Metric  Next-Hop                 Interface   SNPA
router-02             10      router-02                Fa4/3       0010.0ddc.e00b
router-03             10      router-03                Et0/2       0006.0e03.0c45
router-04             10      router-04                Fa4/0       000a.f3c3.1c70
.                             router-04                Fa4/1       000a.f3c3.1c71
.
.
.
Router# show clns tagSecond neighbors
Tag tagSecond:
System Id      Interface   SNPA                State  Holdtime  Type Protocol
router-03      Fa0/2       00d0.2b7f.9502      Up     9         L2   IS-IS
router-03      PO2/2.1     DLCI 211            Up     27        L2   IS-IS
router-02      PO2/0.1     DLCI 131            Up     29        L2   IS-IS
router-11      Fa0/4       000e.d79d.7920      Up     7         L2   IS-IS
router-11      Fa0/5       000e.d79d.7921      Up     8         L2   IS-IS
router-11      PO3/2.1     DLCI 451            Up     24        L2   IS-IS
.
.
.
Router# show isis tagThird database level-2
Tag tagThird:
IS-IS Level-2 Link State Database:
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
router-01.00-00       0x0000000A    0x5E73       914               0/0/0
router-01.03-00       0x00000001    0x8E41       894               0/0/0
router-01.04-00       0x00000001    0x8747       894               0/0/0
router-03.00-00     * 0x00000005    0x55AD       727               0/0/0
router-03.02-00     * 0x00000001    0x3B97       727               0/0/0
router-02.00-00       0x00000004    0xC1FB       993               0/0/0
router-02.01-00       0x00000001    0x448D       814               0/0/0
router-04.00-00       0x00000004    0x76D0       892               0/0/0
Router# show isis tagThird database level-1
Tag tagThird:
IS-IS Level-1 Link State Database:
LSPID                  LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
router-03.00-00      * 0x0000000B   0xBDF6        1005              1/0/0
router-03.02-00      * 0x00000001   0xC473        940               0/0/0
router-07.00-00        0x00000006   0x403A        940               0/0/0
Router# show clns tagSecond protocol
IS-IS Router: tagSecond
  System Id: 0000.0001.0002.00  IS-Type: level-2-only
  Manual area address(es): 
        49.000b
  Routing for area address(es): 
        49.000b
  Interfaces supported by IS-IS:
        FastEthernet4/1 - IP
        FastEthernet4/0 - IP
        Ethernet0/2 - IP
        FastEthernet4/3 - IP
  Redistributing: 
    static
  Distance: 110
  RRR level: none
  Generate narrow metrics: level-1-2
  Accept narrow metrics:   level-1-2
  Generate wide metrics:   none
  Accept wide metrics:     none
Router# show clns tagThird protocol
IS-IS Router: tagThird
  System Id: 0000.0001.0001.00  IS-Type: level-1-2
  Manual area address(es): 
        49.000b
  Routing for area address(es): 
        49.000b
  Interfaces supported by IS-IS:
        POS2/2.1 - IP
        FastEthernet0/2 - IP
        FastEthernet0/4 - IP
        POS2/0.1 - IP
        FastEthernet0/5 - IP
        POS3/2.1 - IP
  Redistributing: 
    static
  Distance: 110
  RRR level: none
  Generate narrow metrics: none
  Accept narrow metrics:   none
  Generate wide metrics:   level-1-2
  Accept wide metrics:     level-1-2
Creating an IS-IS Instance Without a Process Tag: Example

In the following example, an IS-IS instance was created without the optional process tag. When an IS-IS instance is created without the optional process tag, you can display its information by entering the commands such as show clns protocol with "null" specified for the process-tag argument.
Router(config)# router isis
Router(config-router)# vrf first
Router(config-router)# net 49.000b.0000.0001.ffff.00
Router(config-router)# is-type level-1
Router(config)# interface POS 6/1
Router(config-if)# ip vrf forwarding first
Router(config-if)# ip address 172.16.2.1 255.255.255.0
Router(config-if)# ip router isis
Router(config-if)# no shutdown
Because the IS-IS instance is created without the optional process tag, its information is displayed when the show clns protocol command is entered with "null" specified for the process-tag argument:
Router# show clns null protocol
IS-IS Router: <Null Tag>
  System Id: 0000.0001.FFFF.00  IS-Type: level-1
  Manual area address(es): 
        49.000b
  Routing for area address(es): 
        49.000b
  Interfaces supported by IS-IS:
        POS6/1 - IP
  Redistributing: 
    static
  Distance: 110
  RRR level: none
  Generate narrow metrics: level-1-2
  Accept narrow metrics:   level-1-2
  Generate wide metrics:   none
  Accept wide metrics:     none
Redistributing Routes from an IS-IS Instance: Example

In the following sample configuration, routes have been redistributed from the IS-IS instance "null" into the IS-IS instance named tagBLUE. Routes from an OSPF process in VRF Blue have been redistributed into the IS-IS instance named tagBLUE.
Router(config)# router isis tagBLUE
Router(config-router)# redistribute isis null ip metric 10 route-map isisMAP1
Router(config-router)# redistribute ospf 1 vrf BLUE metric 1 metric-type external 
level-1-2
.
.
.
Router(config)# route-map isisMAP1 permit 10
Router(config-route-map)# match route-type level-2 level-1
Router(config-route-map)# set level level-2
Changing the Interface Ownership: Example

In the following sample configuration, POS interface 6/1 was originally enabled for IS-IS IP routing for a "null" instance that does not have a process tag, which is in vrfSecond. The new configuration changes the ownership of POS interface 6/1 to another instance tagSecond, which is also in vrfSecond.

Note Note that use of the ip router isis command in interface configuration mode will overwrite the prior configuration on that interface, but only if the new configuration is attempting to change the interface ownership to a different instance that is in the same VRF as the currently configured owner instance. The configuration will be rejected if the attempted change is between two instances that are associated with different VRFs.
Router(config)# interface POS 6/1
Router(config-if)# ip router isis tagSecond
%ISIS: Interface detached from null and to be attached to instance tagBLUE.
Additional References

The following sections provide references related to the IS-IS Support for an IS-IS Instance per VRF for IP feature.

Related Documents

Related Topic

Document Title

IS-IS commands: complete command syntax, command mode, defaults, command history, usage guidelines, and examples

Cisco IOS IP Routing Protocols Command Reference

Roadmap of IS-IS features

"Integrated IS-IS Features Roadmap" module

Overview of Cisco IS-IS conceptual information with links to all the individual IS-IS modules

"Integrated IS-IS Routing Protocol Overview" module

ISO CLNS commands

Cisco IOS ISO CLNS Command Reference

Standards

Standards

Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

—

MIBs

MIBs

MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

RFCs

RFCs

Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/techsupport

Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS IP Routing Protocols Command Reference at http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_book.html. For information about all Cisco IOS commands, go to the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or to the Cisco IOS Master Commands List.

•show clns neighbors

•show clns protocol

•show isis database

•show isis topology

•vrf (router configuration)

Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP

Feature Name

Releases

Feature Information

IS-IS Support for an IS-IS Instance per VRF for IP

12.0(29)S
12.2(33)SRB

This feature provides multiple VPN routing and forwarding (VRF)-aware Intermediate System-to-Intermediate System (IS-IS) instances. The VRF functionality allows Internet service providers (ISPs) to separate routing protocol information and propagate it to the appropriate routing table and network neighbors. Using one router with VRF functionality is more cost-effective than using separate routers to separate and forward the routing information.

CCDE, CCENT, Cisco Eos, Cisco Lumin, Cisco StadiumVision, the Cisco logo, DCE, and Welcome to the Human Network are trademarks; Changing the Way We Work, Live, Play, and Learn is a service mark; and Access Registrar, Aironet, AsyncOS, Bringing the Meeting To You, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, CCSP, CCVP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Collaboration Without Limitation, EtherFast, EtherSwitch, Event Center, Fast Step, Follow Me Browsing, FormShare, GigaDrive, HomeLink, Internet Quotient, IOS, iPhone, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, iQuick Study, IronPort, the IronPort logo, LightStream, Linksys, MediaTone, MeetingPlace, MGX, Networkers, Networking Academy, Network Registrar, PCNow, PIX, PowerPanels, ProConnect, ScriptShare, SenderBase, SMARTnet, Spectrum Expert, StackWise, The Fastest Way to Increase Your Internet Quotient, TransPath, WebEx, and the WebEx logo are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.

All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0804R)

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

© 2004-2008 Cisco Systems, Inc. All rights reserved.

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IS-IS Support for an IS-IS Instance per VRF for IP

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Table Of Contents

IS-IS Support for an IS-IS Instance per VRF for IP

Contents

Prerequisites for IS-IS Support for an IS-IS Instance per VRF for IP

Restrictions for IS-IS Support for an IS-IS Instance per VRF for IP

Information About IS-IS Support for an IS-IS Instance per VRF for IP

VRF-Aware IS-IS

IS-IS Support for an IS-IS Instance per VRF for IP Feature Operation

How to Configure IS-IS Support for an IS-IS Instance per VRF for IP

Creating a VRF

Prerequisites

SUMMARY STEPS

DETAILED STEPS

Attaching an Interface to the VRF

SUMMARY STEPS

DETAILED STEPS

Creating VRF Aware IS-IS Instances

Prerequisites

Creating a VRF-Aware IS-IS Instance in Interface Configuration Mode

SUMMARY STEPS

DETAILED STEPS

Creating a VRF-Aware IS-IS Instance in Router Configuration Mode

SUMMARY STEPS

DETAILED STEPS

Configuration Examples for IS-IS Support for an IS-IS Instance per VRF for IP

Configuring Multiple VRF-Aware IS-IS Instances: Example

Creating an IS-IS Instance Without a Process Tag: Example

Redistributing Routes from an IS-IS Instance: Example

Changing the Interface Ownership: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

Feature Information for IS-IS Support for an IS-IS Instance per VRF for IP

All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0804R)