Re: BGP- Conditional attribute

Try to debug bgp updates and also look at the sh ip bgp neighbor ..

show ip bgp neighbor x.x.x.x | include Condition-map

After a clear ip bgp * it might take a few minutes.

-Rich

On Mon, Mar 7, 2011 at 12:37 PM, sameer inam <i_sameer_at_hotmail.com> wrote:
> I m just trying to use the below config which you gave me , its didn't work
> .. Same thing I can not see any 7.7.7.7 route on the AS200 router .. any
> idea why ?
>
>
>
>
>
>> Date: Sun, 6 Mar 2011 18:51:59 -0600
>> Subject: Re: BGP- Conditional attribute
>> From: nilsi2002_at_gmail.com
>> To: i_sameer_at_hotmail.com
>> CC: ccielab_at_groupstudy.com
>>
>> Hi,
>>
>> I'm not sure if I understand the scenario exactly.
>>
>> But here is a conditional scenario where 7.7.7.7 will be in the AS300
>> bgp table but won't be advertised to AS200 if there is no default
>> route. The conditional syntax determines whether a network is
>> announced or withdrawn from the neighbor in question.
>>
>> -Rich
>>
>> >>>>>>>>>>no default route<<<<<<<<<<<<<<<<<
>> Router R1
>>
>>
>>
>> router bgp 200
>> no synchronization
>> bgp log-neighbor-changes
>> neighbor 9.9.12.2 remote-as 300
>> default-information originate
>> no redistribute static
>> no auto-summary
>> !
>> ip forward-protocol nd
>> ip route 0.0.0.0 0.0.0.0 Null0
>>
>> R1#sh ip bgp
>> BGP table version is 2, local router ID is 1.1.1.1
>> 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
>> *> 8.8.8.8/32 9.9.12.2 0 0 300 i
>> R1#
>>
>>
>> Router R2
>>
>>
>>
>> router bgp 300
>> no synchronization
>> bgp log-neighbor-changes
>> network 7.7.7.7 mask 255.255.255.255
>> network 8.8.8.8 mask 255.255.255.255
>> neighbor 9.9.12.1 remote-as 200
>> neighbor 9.9.12.1 advertise-map PC exist-map DEFAULT
>> no auto-summary
>> !
>>
>> !
>> ip prefix-list DEFAULT seq 5 permit 0.0.0.0/0
>> !
>> ip prefix-list PC seq 5 permit 7.7.7.7/32
>>
>> !
>> !
>> !
>> !
>> route-map PC permit 10
>> match ip address prefix-list PC
>> !
>> route-map DEFAULT permit 10
>> match ip address prefix-list DEFAULT
>> !
>>
>> R2#sh ip bgp
>> BGP table version is 7, local router ID is 8.8.8.8
>> 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
>> *> 7.7.7.7/32 0.0.0.0 0 32768 i
>> *> 8.8.8.8/32 0.0.0.0 0 32768 i
>> R2#
>>
>>
>>
>>
>> >>>Now if default is available from AS200<<<<
>>
>>
>>
>> R1#sh ip bgp
>> BGP table version is 4, local router ID is 1.1.1.1
>> 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
>> *> 0.0.0.0 0.0.0.0 0 32768 ?
>> *> 7.7.7.7/32 9.9.12.2 0 0 300 i
>> *> 8.8.8.8/32 9.9.12.2 0 0 300 i
>> R1#
>>
>> '
>> R2#sh ip bgp
>> BGP table version is 9, local router ID is 8.8.8.8
>> 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
>> *> 0.0.0.0 9.9.12.1 0 0 200 ?
>> *> 7.7.7.7/32 0.0.0.0 0 32768 i
>> *> 8.8.8.8/32 0.0.0.0 0 32768 i
>> R2#
>>
>>
>>
>>
>> On Sun, Mar 6, 2011 at 6:51 AM, sameer inam <i_sameer_at_hotmail.com> wrote:
>> > Dear expert,
>> > I m trying to implement the conditional attribute Via EBGP . I put the
>> > condition on router which has AS300 and other side is AS200 , its like
>> > that
>> > there is one PC connected in to AS300 network which has IP of 7.7.7.7 .
>> >
>> > condition is if AS200 router has default route then 7.7.7.7 network can
>> > show
>> > into BGP routing table of that router otherwise NO . after I put the
>> > condition
>> > on AS300 router I cannot see 7.7.7.7 route on AS200 router BGP routing
>> > table
>> > but issue is when I m trying to define the default route on AS200 router
>> > its
>> > show as static on normal routing table not in BGP routing table .
>> > AS200 R2 > AS300 R3 >PC 7.7.7.7
>> > can any one help me on that .
>> > kind regards,
>> > Sameer
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
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Received on Mon Mar 07 2011 - 17:48:02 ART