Re: BGP Not Advertising Locally Connected Network

LG,
can you please show the complete configuration, or at least
the interfaces IP addresses ?

Cause your network command is for 172.16.104.0/24 and I thought it might
be that your loopback is on the 172.16.102.0/24 or even some other mask.

-Carlos

Carlos G Mendioroz @ 24/05/2010 11:02 -0300 dixit:
> What about 102 != 104 ?
>
> Ladee Geek @ 24/05/2010 10:07 -0300 dixit:
>> Hi All -
>>
>> this is a very very simple set up of eBgp peering via loopbacks and then
>> advertising the local loopbacks. The idea is to get the candidate to
>> realize the recursive routing issue and to use the backdoor command for the
>> network statements. The problem is, my routers are not advertising the
>> loopbacks? Any ideas?
>>
>>
>> R4 <--> R2
>>
>> router bgp 400
>> no synchronization
>> bgp router-id 172.16.104.1
>> bgp log-neighbor-changes
>> network 172.16.104.0 mask 255.255.255.0 backdoor
>> neighbor 172.16.102.1 remote-as 200
>> neighbor 172.16.102.1 ebgp-multihop 255
>> neighbor 172.16.102.1 update-source Loopback104
>> no auto-summary
>>
>> R4#s bgp sum
>> BGP router identifier 172.16.104.1, local AS number 400
>> BGP table version is 1, main routing table version 1
>> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
>> State/PfxRcd
>> 172.16.102.1 4 200 38 38 1 0 0
>> 00:36:35 0
>>
>>
>> R4#sho ip bgp - you notice NOTHING is in the table
>>
>> R4#
>>
>> R4#sho ip bgp neighbors 172.16.102.1 advertised-routes
>> Total number of prefixes *0 *
>>
>> interface Loopback104
>> ip address 172.16.104.1 255.255.255.0
>> ip pim sparse-mode
>> ip igmp join-group 239.255.1.1
>> ip ospf network point-to-point
>>
>>
>> R4#show ip route 172.16.102.0
>> Routing entry for 172.16.102.0/24
>> Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric
>> 3
>> Redistributing via rip
>> Advertised by rip metric 15
>> Last update from 172.16.10.6 on FastEthernet0/1, 00:41:06 ago
>> Routing Descriptor Blocks:
>> * 172.16.10.6, from 172.16.102.1, 00:41:06 ago, via FastEthernet0/1
>> Route metric is 20, traffic share count is 1
>>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
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