From: Nikhil Engineer (ccienovice@gmail.com)
Date: Tue Apr 22 2008 - 04:47:08 ART
hi Noor,
As I said before this is due to split horizon.
Cheers,
Nikhil E
On 4/22/08, Noor.Yousuf@shell.com <Noor.Yousuf@shell.com> wrote:
>
> Amir,
>
> I understand your point, and I know that it is locally originated again
> and it is in the bgp table but I would only like to know the reason why the
> same route from R3 is not in the BGP table anymore?
>
> Thanks,
>
> -----Original Message-----
> From: Amir.Tahir/Wateen/Lahore [mailto:Amir.Tahir@wateen.com]
> Sent: dinsdag 22 april 2008 9:28
> To: Yousuf, Noor S SITI-ITIBTAE; ccielab@groupstudy.com
> Cc: itsfortarget@gmail.com; smorris@ipexpert.com; sadiqtanko@gmail.com
> Subject: RE: BGP issue
>
>
> Dear Noor,
>
> When you have advertised 200.200.200.0/24 on R3, why you are advertising
> same network Prefix on R2.
>
> If you have eBGP relationship between R1 & R3, you should learn 200
> prefix from R3 and should be visible on R2 as well. You don't have to
> re-advertise it.
>
> If you have eBGP relation between R2 & R4, it should be propagated to R4
> through the AS (Defined on R2 & R1)...
> If Ip route command confuse you, try to run rip between R1 & R2 to have
> the NLRI reachibility..
>
> As far as you query is concern... you have defined the 200 prefix
> through Network command on R2 and now its locally advertised. You could
> verify it through Weight (32768) & AS Path (i).
>
>
> r2#SH IP BGP
> BGP table version is 8, local router ID is 2.2.2.2
> 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
> *> 200.200.200.0 0.0.0.0 0 32768 i
>
>
> If still you are not clear, Please feel free to call me at
> 0322-400-2647(amir)
>
>
> Regards
> __________________
> Amir Tahir
>
>
> -----Original Message-----
> From: Noor.Yousuf@shell.com [mailto:Noor.Yousuf@shell.com]
> Sent: Tuesday, April 22, 2008 12:12 PM
> To: Amir.Tahir/Wateen/Lahore; ccielab@groupstudy.com
> Cc: itsfortarget@gmail.com; smorris@ipexpert.com; sadiqtanko@gmail.com
> Subject: RE: BGP issue
>
> Let me get clear..
>
> R3----EBGP---R1----IBGP-----R2----EBGP----R4
>
>
> from R3 I have advertised the network 200.200.200.0 in BGP
> no sync
> network 200.200.200.0 mask 255.255.255.0
> ip route 200.200.200.0 255.255.255.0 Null0
>
> I can see the network on R2 bgp table
> Now I have advertised the same network in R2
> no sync
> network 200.200.200.0 mask 255.255.255.0
> ip route 200.200.200.0 255.255.255.0 Null0
>
> As soon as I have advertised the network in R2 BGP, I cannot see the
> route coming from R1 in the BGP Table, I thought I should see both
> routes in BGP table but only one in Routing table.
>
> r2#SH IP BGP
> BGP table version is 8, local router ID is 2.2.2.2
> 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
> *> 200.200.200.0 0.0.0.0 0 32768 i
>
> Can someone explains why?
>
> Thanks,
>
>
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