Re: BGP conditional advertise not working.

From: Sadiq Yakasai (sadiqtanko@gmail.com)
Date: Tue Feb 17 2009 - 20:41:46 ARST

I havent done this in a long time, but i remember 2 things which I havent
see above:

1. There was matching on the "next-hop" of a prefix. I dont remember if this
goes in the first or second route-map. Check that one.

2. The route-map containing the prefix to be injected should have "set ip
address" and not "match ip add". Can you check this feature documentation
again to confirm these things please?

HTH,

Sadiq

On Tue, Feb 17, 2009 at 10:23 PM, Mahesh Shivaswamy <maheshs.cisco@gmail.com
> wrote:

> Hi,
>
> I am not sure why is R2 advertising prefix 136.1.29.0/24 when the
> route 136.1.23.0/24 exist in the routing table ???
>
> I have the following configs on R2
>
> R2#sh run | be router bgp
> router bgp 300
> no synchronization
> bgp router-id 150.1.2.2
> bgp log-neighbor-changes
> network 136.1.29.0 mask 255.255.255.0
> neighbor 136.1.23.3 remote-as 100
> neighbor 136.1.29.9 remote-as 100
> neighbor 136.1.245.5 remote-as 200
> neighbor 136.1.245.5 advertise-map ADVERTISE non-exist-map NON-EXIST
> no auto-summary
> !
> ip prefix-list HDLC seq 5 permit 136.1.23.0/24
> !
> ip prefix-list VLAN29 seq 5 permit 136.1.29.0/24
> !
> route-map NON-EXIST permit 10
> match ip address prefix-list HDLC
> !
> route-map ADVERTISE permit 10
> match ip address prefix-list VLAN29
>
> R2#sh ip bgp ne 136.1.245.5 advertised-routes
> BGP table version is 9, local router ID is 150.1.2.2
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 136.1.3.0/24 136.1.23.3 0 0 100 i
> *> 136.1.29.0/24 0.0.0.0 0 32768 i
>
> Total number of prefixes 2
>
>
> R2#sh ip bgp ne 136.1.245.5 | in Condition
> Condition-map NON-EXIST, Advertise-map ADVERTISE, status: Advertise
>
>
> R2#sh ip route 136.1.23.0
> Routing entry for 136.1.23.0/24
> Known via "connected", distance 0, metric 0 (connected, via interface)
> Redistributing via ospf 1, eigrp 100
> Advertised by ospf 1
> Routing Descriptor Blocks:
> * directly connected, via Serial0/1
> Route metric is 0, traffic share count is 1
>
> rgds
> Mahesh
>
>
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