[alcatel-nsp] 7750 Route Reflector Server Question

Ben Robinson brobinson at lsnetworks.net
Fri Mar 4 01:34:43 EST 2011

The goal is to collapse RR an ASBR functions into the same router. The solution I'm after would meet the best practice of keeping the route reflector out of the forwarding path while allowing the same router to pick up external peers.

Ben Robinson
Systems Engineer
LS Networks

-----Original message-----
From: "Griego, Michael (Michael)" <michael.griego at alcatel-lucent.com>
To: Ben Robinson <brobinson at lsnetworks.net>
Cc: "alcatel-nsp at puck.nether.net" <alcatel-nsp at puck.nether.net>
Sent: Fri, Mar 4, 2011 03:21:17 GMT+00:00
Subject: Re: [alcatel-nsp] 7750 Route Reflector Server Question

Where is the placement of the route-reflector?  If you place the route-reflector so that it is not the ebgp peering router (asbr) then all that is needed is to set next hop self on asbr and leave route reflector without next hop self.  I thought best practice was to typically remove a route reflector from forwarding path.


On Mar 3, 2011, at 5:28 PM, "Ben Robinson" <brobinson at lsnetworks.net<mailto:brobinson at lsnetworks.net>> wrote:


I’m using route reflection on 7750-SR (8.0R7) and want to set next hop self for routes learned from external BGP peers, but not on routes learned from internal BGP peers. The goal is to reflect routes from internal peers, preserving the IGP next hop while setting next hop self on routes from external peers. Perhaps this is the default behavior.

I can set all routes to next hop self in the 7750 Peer/Group configuration and with a policy. Since I don’t want all routes advertised internally by the 7750 to have the next hop self set, I’m assuming that it is accomplished in a policy.

Firstly, does anyone know if this is the default behavior? Or, if possible, how to accomplish this with SROS policy.

The Juniper policy equivalent is:

term external {
    from route-type external;
    then {
        next-hop self;
term internal {
    from route-type internal;
    then accept;


Policy nhs-ipv6:
    Term external:
        from route-type external
        then nexthop self accept
    Term internal:
        from route-type internal
        then accept


Ben Robinson
Systems Engineer
LS Networks, Inc.

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