Load Sharing - BGP

Published on July 17 2013

Question:

I have two links to ISPs on one router.WS-C3750X-48T-L They are advertising default route to me. Both ISP are in different AS. I want to share load on both links. I want to configure bgp bestpath as-path multipath-relax command but my router doesnt support it. What i am seeing while configuring it is mention below.

Can anyone pls help me configuring this.

Router(config-router)#bgp bestpath ?

compare-routerid Compare router-id for identical EBGP paths

cost-community cost community

med MED attribute

Router(config-router)#bgp bestpath

Router#sh ver

Cisco IOS Software, 3800 Software (C3845-SPSERVICESK9-M), Version 12.4(24)T, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.

Compiled Wed 25-Feb-09 23:14 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T10, RELEASE SOFTWARE (fc1)

Answer:

This is cisco hidden command -> bgp bestpath as-path multipath-relax

You will not see it, but you can use it.

R1(config)#

R1(config)#router bgp 100

R1(config-router)#bgp bestpath ?

compare-routerid Compare router-id for identical EBGP paths

cost-community cost community

med MED attribute

R1(config-router)#bgp bestpath as-path multipath-relax

R1(config-router)#do sh run | s bgp

router bgp 100

no synchronization

bgp log-neighbor-changes

bgp bestpath as-path multipath-relax

no auto-summary

R1(config-router)# WS-C3750X-48T-S Price

http://wiki.nil.com/Multipath_Load_Sharing_with_two_ISPs

Written by 3Anetwork

Repost0
To be informed of the latest articles, subscribe:
Comment on this post