Where I can find info for "bgp bestpath as-path multipath-relax"
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08-09-2007 12:57 PM - edited 03-03-2019 06:15 PM
Where can I find info for a hidden command "bgp bestpath as-path multipath-relax".
Client is asking if we can use this command to load balance between two MPLS carriers but can't find any info from CCO.
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08-09-2007 02:10 PM
did you try this link
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00800b5d5f.html
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08-10-2007 04:34 AM
Yes I've checked this page but can't find the "bgp bestpath as-path multipath-relax" command that the client was asking for?
What exactly this command do?
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08-10-2007 05:22 AM
Hi,
This will allow the router to load-share across multiple BGP paths even if the as-path is different.
HTH,
Mohammed Mahmoud.
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08-10-2007 05:27 AM
Thanks,
But what are the criterias I can use to control the load share? Is it at CE side or PE side?
Can you provide a link for detail?
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08-10-2007 05:47 AM
Hi,
To load share over multiple eBGP routes, the routes must be equal-cost paths with identical BGP attributes (same Weight, Local-Pref, AS-Path, Origin and MED and different next-hop - Even the AS_PATH should match (entire attribute and not just length), and here comes the job of this command to alter the AS_PATH part.
HTH,
Mohammed Mahmoud.
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08-10-2007 08:00 AM
In this case if I setup "maximum-path" then it will do the same thing why do I want to use "bgp bestpath as-path multipath-relax"?
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08-10-2007 09:13 AM
Hi Frank,
No, you'll have to use the maximum-path to do load sharing any way, but when using this command the load sharing will accept multiple paths with different AS_PATH which is not the normal case.
HTH,
Mohammed Mahmoud.
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08-09-2007 02:54 PM
Ok, Thanks.
Is there any document for this command?
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08-13-2007 08:58 AM
hi,
Previously, i posted the same question regarding "bgp bestpath as-path multipath-relax". Seems to work under dynampis simulator.
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07-17-2013 02:43 AM
I know this is really old, but what is the current status for this command? I can't find it in IOS documentation (but found one in NX-OS). On IOS 12.5, it's hidden (not shown with ?) but I can enter it without error. However it does not seem to do anything...
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07-17-2013 08:09 AM
Hi,
Even though this is a hidden command, I know many customers using it. Make sure you also configure "maximum-paths" for the "bgp bestpath as-path multipath-relax" to take effect.
Regards
Harold Ritter, CCIE #4168 (EI, SP)
