Administrator Guide

Contents 45
BGP Configuration Examples . . . . . . . . . . . . . 1422
Enabling BGP
. . . . . . . . . . . . . . . . . . . 1422
BGP Example
. . . . . . . . . . . . . . . . . . . 1423
Network Example
. . . . . . . . . . . . . . . . . 1424
BGP Redistribution of OSPF Example
. . . . . . 1425
Configuring the Multi-Exit Discriminator in BGP
Advertised Routes
. . . . . . . . . . . . . . . . 1426
Configuring Communities in BGP
. . . . . . . . . 1427
Configuring a Route Reflector
. . . . . . . . . . 1428
Campus Network MP-BGP and OSPF
Configuration . . . . . . . . . . . . . . . . . . . 1430
Configuring MP-eBGP and Extended
Communities
. . . . . . . . . . . . . . . . . . . 1446
40 Bidirectional Forwarding
Detection
. . . . . . . . . . . . . . . . . . . . . . . 1453
Overview . . . . . . . . . . . . . . . . . . . . . . . . 1453
BFD Operational Modes
. . . . . . . . . . . . . . . . 1454
Asynchronous Mode
. . . . . . . . . . . . . . . 1454
Demand Mode
. . . . . . . . . . . . . . . . . . 1454
Echo Function
. . . . . . . . . . . . . . . . . . . 1455
Limitations
. . . . . . . . . . . . . . . . . . . . . . . 1455
BFD Example
. . . . . . . . . . . . . . . . . . . . . . 1456
41 IPv6 Routing. . . . . . . . . . . . . . . . . . . . . 1459
IPv6 Routing Overview. . . . . . . . . . . . . . . . . 1459
How Does IPv6 Compare with IPv4?
. . . . . . . 1460
How Are IPv6 Interfaces Configured?
. . . . . . 1460
Default IPv6 Routing Values
. . . . . . . . . . . . . . 1462