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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 BGP-LS

Configuring BGP-LS

Usage Scenario

Without BGP-LS, the switch uses an IGP (OSPF or IS-IS) to collect topology information of each AS, and the IGP reports the information to the controller. This topology information collection method has the following disadvantages:
  • The controller must have high computing capabilities and support the IGP and its algorithm.
  • The controller cannot gain the complete inter-AS topology information and therefore is unable to calculate optimal E2E paths.
  • Different IGPs report topology information separately to the controller, which complicates the controller's analysis and processing.
With powerful routing capabilities of BGP, BGP-LS provides a simple and efficient method of collecting topology information and has the following advantages:
  • Reduces computing capability requirements and spares the necessity of IGPs on the controller.
  • Facilitates route selection and calculation on the controller by using BGP to summarize process or AS topology information and report the complete information to the controller.
  • Requires only one routing protocol (BGP) to report topology information to the controller.

BGP-LS needs to be deployed on the controller and the devices connected to it.

Pre-configuration Tasks

Before configuring BGP-LS, configure basic IS-IS functions or configure basic OSPF functions.

Configuration Procedure

Perform the following operations in sequence and as required.

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Updated: 2019-03-21

Document ID: EDOC1000166601

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