One BGP neighbor won't advertise its TokenRing subnet

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Sep 5th, 2008
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RouterJ and RouterH are connected on a b2b PPP link, 215.0.0.18/30 (J) and .17(30)H. H is connected to an up-and-running TokenRing segement, 10.4.4.0/24. H's BGP config looks like this:


router bgp 50

bgp log-neighbor-changes

network 10.4.4.0

neighbor 215.0.0.18 remote-as 100


but its table contains only the 4 loopbacks being advertised to it by J


RouterH#sh ip bgp

BGP table version is 49, local router ID is 215.0.0.17

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

*> 205.1.12.0 215.0.0.18 0 0 100 i

*> 205.1.13.0 215.0.0.18 0 0 100 i

*> 205.1.14.0 215.0.0.18 0 0 100 i

*> 205.1.15.0 215.0.0.18 0 0 100 i

RouterH#


going over to Router J, we have a BGP config of:


router bgp 100

network 205.1.12.0

network 205.1.13.0

network 205.1.14.0

network 205.1.15.0

neighbor 215.0.0.17 remote-as 50

!


and a bgp table of:


RouterJ#sh ip bgp

BGP table version is 5, local router ID is 205.1.15.1

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

*> 205.1.12.0 0.0.0.0 0 32768 i

*> 205.1.13.0 0.0.0.0 0 32768 i

*> 205.1.14.0 0.0.0.0 0 32768 i

*> 205.1.15.0 0.0.0.0 0 32768 i

RouterJ#



The 10.4.4.0/24 network was declared on H's BGP process and the segment is up and running, so why is it not being advertised over to J?


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mibrahim81 Fri, 09/05/2008 - 17:50
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Dear sir,


Could you told me if summarization enabled or not under BGP process on router H.


Edison Ortiz Fri, 09/05/2008 - 18:04
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Make sure to have auto-summary disabled under BGP and also have this command instead,

network 10.4.4.0 mask 255.255.255.0


HTH,


__


Edison.

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