[j-nsp] MBGP automatic filtering?

[Doug Marschke]

Yes, JUNOS only keeps routes that have a matching route target.

You could configure the keep-all knob under BGP to see all routes on
your PE.

I guess I ask the question, why you want to see all that garbage?  These
is a very good reason for that automatic filtering :)



Doug Marschke 
Principal Technologist 
Strategic Networks Training 
JNCIE-ER #3, JNCIE-M/T #41, JNCIS-FW, JNCI 
www.ietraining.net 
(415)902-5702 

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
michael.firth at bt.com
Sent: Tuesday, June 24, 2008 8:52 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] MBGP automatic filtering?

A (hopefully) simple question for someone on here.

When connecting a PE router to a route reflector, there seems to be some
form of automatic filtering going on with the bgp.l3vpn.0 table.

On the RR I see the following for a 'show bgp neighbor <pe-address>':
...
  Table bgp.l3vpn.0 Bit: 20017
    RIB State: BGP restart is complete
    RIB State: VPN restart is complete
    Send state: in sync
    Active prefixes:              9
    Received prefixes:            9
    Suppressed due to damping:    0
    Advertised prefixes:          1156
...

While on the PE, for a 'show bgp neighbor <rr-address>' I get:
...
  Table bgp.l3vpn.0
    RIB State: BGP restart is complete
    RIB State: VPN restart is complete
    Send state: not advertising
    Active prefixes:              9
    Received prefixes:            9
    Suppressed due to damping:    0
...

The PE seems to be doing some form of automatic filtering on the
received prefixes from the RR, to only include those that are required
for routing-instances it has configured.

Is there any command that can override this, and show the full list of
prefixes received from the RR?

Thanks

Michael

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