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WinkyWolly
Asked: 2014-01-28 17:55:59 +0800 CST

Simple Vyatta configuration / BGP routes not injecting into routing table

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I have a exceptionally simple setup I'm playing with however I'm banging my head against the wall as to why it's not working.

Right now I have two Vyatta routers (R1, R2) connected locally. Both are connected via a cross connect. I've setup a BGP session between the two - that's working as intended. There is no route-maps / policies in place. I'm simply trying to advertise a single route from R1 to R2 via BGP (I'm not using any IGP yet, merely a static route).

Everything is seemingly working as it's supposed to - R1 and R2 have a BGP session open and R2 see's the routes R1 is attempting to advertise:

vyatta@R2# run show ip bgp neighbors 10.0.50.10 received-routes
BGP table version is 5, local router ID is 10.0.60.10
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete

Network          Next Hop            Metric LocPrf Weight Path
*> 10.0.2.0/24      10.0.50.10                             0 1 i

Total number of prefixes 1

Now the problem is that's just routes it's seeing however it's not actively adding it to the routing table. Running show ip bgp will list nothing as well as show ip bgp neighbor 10.0.50.10 routes. R2 can access the next hop (R1) at 10.0.50.10.

Am I missing something terribly obvious?

networking

1 Answers

  1. Best Answer

    Lets assume You are advertising for example route 192.168.1.0/24 from R1. R1 needs to have this route installed in its routing table.

    So You need to have any of these for example: - an interface that is actually UP with IP from 192.168.1.0/24. If it is DOWN (no link) You will not get that route advertised via BGP. (Why advertise something if interface is down?)
    - a route to 192.168.1.0/24 to null0 may force it to advertise it
    - 192.168.1.0/24 in routing table from any other source like a static entry, and entry from another protocol like ospf.

    reassuming: BGP will not advertise something (network) that doesn't exist in your routing table.

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