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RE: BGP question posted 08/19/2003
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Do you mean to make those two routes appear as bgp-learned routes in
routing table? 

I don't think this can be achieved. Any other taker? 

Paul

========================================================

For the two loopback address, they can not be
synchronized.  I'm asked to keep this two as BGP
routes on all BGP routers.  

Is it possible to enable syncronization on r2 and r1
and make them synchronized? 

Thanks.


--- pauldongso <pauldongso@xxxxxxxxxxx> wrote:
> Can you pls specify the peering relationship first?
> If r5 peer with r3
> and r2, there won't be any loop. If r5 peers with r3
> only, there will
> loop. Then use backdoor command in r5 for prefix
> learned from as20, in
> that case, r5 will choose the path learned from ospf
> via r2 instead of
> the path learned from bgp via r3.
> 
> Is this the answer you are after?
> 
> Paul
> 
> -----Original Message-----
> From: nobody@xxxxxxxxxxxxxx
> [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
> Peng Zheng
> Sent: Tuesday, 19 August 2003 1:37 AM
> To: default@xxxxxxxxxxxxxx; ccielab@xxxxxxxxxxxxxx
> Subject: RE: BGP question
> 
> 
> Yes.  I think so. But there is a route loop for
> routes
> from AS 20.
> 
> R5 goes to R3 and R3 goes to R5.
> 
> --- pauldongso <pauldongso@xxxxxxxxxxx> wrote:
> > Hi Peng
> > 
> > As the question is not that clear, I can only make
> a
> > guess.
> > 
> > Since r4 is not part of the bgp, any bgp prefix
> > needs to be
> > redistributed to ospf to make r4 aware of their
> > existence before full
> > reachability is achieved.
> > 
> > 
> > Paul
> > 
> > =================================================
> > 
> >          Topology as:
> > 
> >           R3
> >            |
> >           R4
> >            |
> >           R5-----R2---R1
> >            |      |
> >           R6   (AS 20)
> > 
> > OSPF run among them.
> > 
> > Now R1, R2, R3 in AS 1, R2 as Route Reflector.
> > Without
> > BGP on R4. R5 in AS 2.
> > 
> > Reqiurement:
> > 
> > R3 and R6 propagate their lo 1 into BGP,
> > They are 199.100.1.0 and 199.101.1.0
> > 
> > 
> > 1. routes from AS 20 needed to be reachable from
> all
> > BGP routers.
> > 
> > 2. routes for lo 1 of R3 and R6 should be
> reachable
> > from any routers runing BGP.
> >  
> > 3. propagate only one route into AS 2 for lo 1 of
> R3
> > and R6.
> > 
> > 4. routes from AS 20 should be appeared as BGP
> > routes
> > on all BGP routers.
> > 
> > How to satisfy all these at the same time?
> > 
> >  
> > 
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