Cabletron Systems SmartSwitch manual BGP Configuration Examples, Following is an example

Chapter 10: BGP Configuration Guide

The following is an example:

#

#insert two instances of the AS when advertising the route to this peer

bgp set peer-host 194.178.244.33 group nlnet as-count 2

#insert three instances of the AS when advertising the route to this

#peer

#

bgp set peer-host 194.109.86.5 group webnet as-count 3

Notes on Using the AS Path Prepend Feature

•Use the as-countoption for external peer-hosts only.

•If the as-countoption is entered for an active BGP session, routes will not be resent to reflect the new setting. To have routes reflect the new setting, you must restart the peer session. To do this:

a.Enter Configure mode.

b.Negate the command that adds the peer-host to the peer-group. (If this causes the number of peer-hosts in the peer-group to drop to zero, then you must also negate the command that creates the peer group.)

c.Exit Configure mode.

d.Re-enter Configure mode.

e.Add the peer-host back to the peer-group.

If the as-countoption is part of the startup configuration, the above steps are unnecessary.

BGP Configuration Examples

This section presents sample configurations illustrating BGP features. The following features are demonstrated:

•BGP peering

•Internal BGP (IBGP)

•External BGP (EBGP) multihop

•BGP community attribute

•BGP local preference (local_pref) attribute

134 SmartSwitch Router User Reference Manual