[j-nsp] export policy Junos 9.0

[david.roy at orange-ftgroup.com]

Thank you Mark,

More detail : 

I've one peer X.X.X.X with the following export policy 

peer X.X.X.X {
   description mypeer
   export POLY1 POLY2 
}

When I try to add the POLY3 

set peer X.X.X.X export POLY3

show 

peer X.X.X.X {
   description mypeer
   export POLY1 POLY2 POLY3
}

Commit sync

I've this message :

Oct 21 02:31:34.888543 bgp_peer_delete: NOTIFICATION sent to X.X.X.X (Internal AS YYYY): code 6 (Cease) subcode 3 (Peer Unconfigured), Reason: Peer Deletion

Regards,
David


-----Message d'origine-----
De : Mark Tinka [mailto:mtinka at globaltransit.net] 
Envoyé : mardi 21 octobre 2008 03:51
À : juniper-nsp at puck.nether.net
Cc : ROY David DTF/DERX
Objet : Re: [j-nsp] export policy Junos 9.0

On Tuesday 21 October 2008 09:29:13
david.roy at orange-ftgroup.com wrote:

> But it's not clear for the export statement.

The following has been our experience:

The general idea is that changing parametres that affect the BGP session/peering itself (i.e., what causes the session to establish or get torn down) would likely cause a reset, e.g., ASN change, MD5 password change, e.t.c.

However, changes that affect the routing policy (i.e., what gets carried in the next BGP update) would not tear the session down.

Export/import policies affect the routing policy, not so much the actual session itself, e.g., modifying the LOCAL_PREF value under an import policy, and issuing a commit, would not tear the session(s).

Some vendors have distinguished these paradigms by allowing for session templates (those that affect the actual peering/session itself, i.e., is it up or down) and policy templates (those that affect what gets carried in the next BGP update, i.e., the routing policy).

Cheers,

Mark.

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