12-21-2018 04:56 PM
The peering LAN I'm trying to join the route-server for isn't adding routes to my router. They can see they're being advertised but I don't see them. I do however see something call "MALFORM treat as withdraw" could this be something to do with why I'm not receiving any routes?
Thanks
12-22-2018 12:05 AM
Hello Ryan,
You did not share your own BGP configuration so it is difficult to understand your setup in closer detail. However, from what you wrote, I understand that there is a BGP route server in your network, and you are trying to peer your own router to it, and you are not receiving any routes from it.
My first question is whether you have configured your own router with the no bgp enforce-first-as command in your BGP process configuration. This command is required on clients of BGP route servers - this is because route servers do not change the AS_PATH and next-hop attributes (they are transparent in this sense), yet they exist in their own AS, so for your router, the received advertisements are treated as malformed because the first ASN in the AS_PATH is not the ASN of the route server. The no bgp enforce-first-as command deactivates this sanity check. More details here:
If configuring this command in your BGP process does not help then I would like to ask you to share the following details:
Thank you!
Best regards,
Peter
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