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Configuration Guide - IP Unicast Routing
CloudEngine 12800 and 12800E V200R002C50

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.

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Configuring a NET and Enabling IPv6 IS-IS

Configuring a NET and Enabling IPv6 IS-IS


NET is the special form of the network service access point (NSAP). After the IS-IS view is displayed, IS-IS can start only when a NET is configured for an IS-IS process.

Generally, you only need to configure one NET for an IS-IS process. When an area needs to be redefined, for example, the area needs to be merged with other areas or divided into sub-areas, configure multiple NETs to ensure route correctness. A maximum of three area addresses can be configured for an IS-IS process. Therefore, a maximum of three NETs can be configured for an IS-IS process. When configuring multiple NETs, ensure that their system IDs are the same.

IS-IS can run on an IPv6 topology only when IPv6 is enabled on an IS-IS process.


  1. Run system-view

    The system view is displayed.

  2. Run isis [ process-id ]

    The IS-IS process view is displayed.

  3. Run network-entity net

    A NET is configured.


    Configuring loopback interface addresses based on NETs is recommended to ensures that a NET is unique on the network. If NETs are not unique, route flapping will easily occur.

    An area ID is used to uniquely identify an area in the same IS-IS domain. All routers in the same Level-1 area must share the same area ID, while routers in the same Level-2 area can have different area IDs.

  4. Run ipv6 enable

    IPv6 is enabled for the IS-IS process.

  5. Run commit

    The configuration is committed.

Updated: 2019-03-21

Document ID: EDOC1000166601

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