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NX-OS BGP AD Manipulation
I'm trying to change the admin distance of a single BGP peer received prefixes on NX-OS. The backdoor command does not work on NX-OS and the distance command changes AD globally for the whole address-family process. Was thinking maybe using vrf in the address-family but it doesnt look like BGP supports vrf. Any ideas?
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networker050184
Mod Posts: 11,962 Mod
I guess the end goal is to have IGP routes preferred and the BGP route as a backup? Not sure if there is anyway to do exactly what you are asking, but is there a way to get some more specifics into the IGP and possibly a backup aggregate via BGP as a work around?An expert is a man who has made all the mistakes which can be made. -
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Dieg0M
Member Posts: 861
The IGP is injecting non contiguous Public IP's so it will be pretty tricky to have an aggregate not encompass another AS and blackhole some traffic. The only solution I can think of right now is to lower those prefixes in the IGP since I cant increase them in BGP.
**EDIT:
The solution of lowering the AD of those prefixes in the IGP does not work either. Distance command in NX-OS is global only for IGP's also..Follow my CCDE journey at www.routingnull0.com -
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Roy4USA
Member Posts: 22 ■□□□□□□□□□
Perhaps try changing those prefixes with Policy Based Routing?
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 6.x - Configuring Advanced BGP [Cisco Nexus 7000 Series Switches] - Cisco -
OptionsDieg0M
Member Posts: 861
I did not know you could change AD with PBR in NX-OS. I will try it on a spare Nexus switch tomorrow. Thank you!
Edit: ** I tried but it looks like it's only supported on nexus 7k. I am using nexus 3k so limited features as this is a LLC switch.Follow my CCDE journey at www.routingnull0.com