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Configuration Guide - IP Unicast Routing

S7700 and S9700 V200R010C00

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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IS-IS Multi-Instance and Multi-Process

IS-IS Multi-Instance and Multi-Process

On a VPN-supporting device, you can associate multiple VPN instances with multiple IS-IS processes to implement IS-IS multi-instance. IS-IS multi-process allows you to create multiple IS-IS processes in the same VPN (or on the public network). These IS-IS processes are independent of each other. Route exchange between IS-IS processes is similar to route exchange between routing protocols.

Each IS-IS process can be bound to a specified VPN instance. A typical application is as follows: In a VPN, IS-IS runs between PEs and CEs and also runs on the VPN backbone network. On the PEs, the two IS-IS processes are independent of each other.

IS-IS multi-instance and multi-process have the following characteristics:
  • IS-IS multi-processes share an RM routing table. IS-IS multi-instances use the RM routing tables in VPNs, and each VPN has its own RM routing table.

  • IS-IS multi-process allows a set of interfaces to be associated with a specified IS-IS process. This ensures that the specified IS-IS process performs all the protocol operations only on this set of interfaces. In this manner, multiple IS-IS processes can work on a single router and each process is responsible for managing a unique set of interfaces.

  • When creating an IS-IS process, you can bind it to a VPN instance to associate the IS-IS process with the VPN instance. The IS-IS process accepts and processes only the events related to the VPN instance. When the bound VPN instance is deleted, the IS-IS process is also deleted.

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Updated: 2019-08-21

Document ID: EDOC1000141900

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