R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

349

Configuring IPv6 IS-IS

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."

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.

Configuring basic IPv6 IS-IS

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

Configuration prerequisites

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

• Enable IPv6 globally.

• Configure IP addresses for interfaces, and make sure that all neighboring nodes can reach each

other.

• Enable IS-IS.

Configuration procedure

To configure basic IS-IS:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enable an IS-IS process and

enter IS-IS view.

isis [ process-id ]

Not enabled by default.

3. Configure the network entity

title for the IS-IS process.

network-entity net Not configured by default.