[j-nsp] BGP Graceful Restart

[Harry Reynolds]

I believe it is expected that IGP adjacencies and BGP sessions will bounce
as the new RE takes over. We do not replicate protocol state between the
REs. The goal of GR is not to preserve the control plane, I.e., to keep an
adjacency up. The goal is to permit forwarding while the control plane
restarts. Put another way, I think it a far better test to generate some
traffic over the BGP/IS-IS session/adjacencies and see what happens to
traffic flow during RE removal. If an adjacencies bounces, and no packets
are lost, then does it really matter?



HTHs



> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of 
> Khawaja, Kashif
> Sent: Wednesday, September 22, 2004 2:11 PM
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] BGP Graceful Restart
> 
> Hi All:
> 
> Trying to test Graceful Restarts for different protocols and 
> seem to be having a little trouble getting it to work.
> I have an M40 and M160 connected to each other and running 
> isis and bgp.
> If I were to pull the active RE on the 160 the isis and bgp 
> adjacency bounce. I have the following configuration in on 
> both the routers:
> routing-options {   
>     graceful-restart;
>     static {
>         route 172.16.0.0/16 next-hop 172.19.253.1;
>     }
> }
> 
> And also the RE switchover config in for the 160.
> 
> chassis {
>     redundancy {
>         failover on-loss-of-keepalives;
>         graceful-switchover {
>             enable;
>         }
>     }
> }
> 
> Am I missing something?
> 
> Thanks.
> Kashif.
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