Configuring ipv6 is-is, Overview, Configuring basic ipv6 is-is – H3C Technologies H3C S5560 Series Switches User Manual

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Configuring IPv6 IS-IS

Overview

IPv6 IS-IS supports all IPv4 IS-IS features except that it advertises IPv6 routing information. This chapter

describes only IPv6 IS-IS specific configuration tasks. For information about IS-IS, see "

Configuring IS-IS

."

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 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 new 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 IPv6 IS-IS.

Configuring basic IPv6 IS-IS

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

Configure IPv6 addresses for interfaces to ensure IPv6 connectivity between neighboring nodes.

Enable IS-IS.

Basic IPv6 IS-IS configuration can implement the interconnection of IPv6 networks.
To configure basic IPv6 IS-IS:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enable an IS-IS process and

enter IS-IS view.

isis [ process-id ] [ vpn-instance
vpn-instance-name ]

By default, no IS-IS process is
enabled.

3.

Configure the network entity
title (NET) for the IS-IS

process.

network-entity net

By default, no NET is configured.

4.

Enable IPv6 for the IS-IS
process.

ipv6 enable

The default setting is disabled.

5.

Return to system view.

quit

N/A

6.

Enter interface view.

interface interface-type
interface-number

N/A

7.

Enable IPv6 for IS-IS on the

interface.

isis ipv6 enable [ process-id ]

By default, IPv6 is disabled for IS-IS
on an interface.

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