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Configuring bgp4 (ipv4 and ipv6), Chapter 27, Configuring – Brocade BigIron RX Series Configuration Guide User Manual

Page 891: Bgp4 (ipv4 and ipv6), Configuring bgp4, Ipv4 and ipv6), Chapter

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BigIron RX Series Configuration Guide

813

53-1002484-04

Chapter

27

Configuring BGP4 (IPv4 and IPv6)

In this chapter

Overview of BGP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 814

Brocade implementation of BGP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819

Memory considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 820

Configuring BGP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 820

Activating and disabling BGP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 825

Entering and exiting the address family configuration level. . . . . . . . . . . . 826

Filtering specific IP addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827

Defining an AS-path filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 828

Defining a community filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 829

Configuring a switch to allow routes with its own AS number . . . . . . . . . . 830

BGP Null0 routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 830

Aggregating routes advertised to BGP4 neighbors . . . . . . . . . . . . . . . . . . . 834

Configuring the device to always compare MEDs . . . . . . . . . . . . . . . . . . . . 835

Redistributing IBGP routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 836

Disabling or re-enabling client-to-client route reflection . . . . . . . . . . . . . . . 836

Configuring a route reflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837

Enabling or disabling comparison of the router IDs . . . . . . . . . . . . . . . . . . 837

Configuring confederations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837

Configuring route flap dampening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 840

Originating the default route. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 841

Changing the default local preference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 841

Changing the default metric used for redistribution . . . . . . . . . . . . . . . . . . 842

Changing administrative distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 842

Requiring the first AS to be the neighbor’s AS . . . . . . . . . . . . . . . . . . . . . . 843

Enabling fast external fallover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 844

Setting the local AS number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 845

Changing the maximum number of shared BGP4 paths . . . . . . . . . . . . . . 845

Treating missing MEDs as the worst MEDs . . . . . . . . . . . . . . . . . . . . . . . . . 845

Customizing BGP4 load sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 846

Configuring BGP4 neighbors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 846

Configuring a BGP4 peer group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 854

Specifying a list of networks to advertise . . . . . . . . . . . . . . . . . . . . . . . . . . 857