F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

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50BConfiguring IPv6 IS-IS

The term "router" in this document refers to both routers and routing-capable firewalls and UTM devices.

This chapter describes how to configure IPv6 IS-IS, which supports all IPv4 IS-IS features except that it

advertises IPv6 routing information. For information about IS-IS, see "Configuring IS-IS."

IPv6 IS-IS can be configured only at the CLI.

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Feature and hardware compatibility

Hardware IPv6 IS-IS

com

atible

F1000-A-EI/F1000-S-EI No

F1000-E No

F5000 Yes

Firewall module No

U200-A No

U200-S No

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Overview

Intermediate System-to-Intermediate System (IS-IS) supports multiple network protocols, including IPv6. To

support IPv6, the IETF added two type-length-values (TLVs) and a new network layer protocol identifier

(NLPID).

The two TLVs are as follows:

• IPv6 Reachability—Contains routing prefix and metric information to describe network reachability

and has a type value of 236 (0xEC).

• IPv6 Interface Address—Same as the "IP Interface Address" TLV in IPv4 ISIS, except that the 32-bit

IPv4 address is translated to the 128-bit IPv6 address.

The NLPID is an 8-bit field that identifies which network layer protocol is supported. For IPv6, the NLPID

is 142 (0x8E), which must be carried in hello packets sent by a router that supports IPv6 IS-IS.

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Configuring basic IPv6 IS-IS

Basic IPv6 IS-IS configuration can implement the interconnection of IPv6 networks.

922BConfiguration prerequisites

Before you configure basic IPv6 IS-IS, complete the following tasks:

• Enable IPv6 globally.