removing null route from bgp aggregate command

From: Erin Brown (suplepo@yahoo.com)
Date: Sat Apr 07 2007 - 17:30:35 ART


Howdy folks,

I've been working through a few BGP scenarious and am
having a hard time removing the null route entries
generated when I create an agregate in bgp. I know
that one of the requirements is to have now null
routes (including those generated by routing
protocols). Removing with EIGRP and OSPF is simply a
matter of admin distance, but I'm not seeing a similar
option for the aggregate command.

What am I missing?

Sample config:

router bgp 300
 no synchronization
 bgp router-id 150.1.2.2
 bgp log-neighbor-changes
 network 136.1.23.0 mask 255.255.255.0
 network 136.1.29.0 mask 255.255.255.0
 network 150.1.2.0 mask 255.255.255.0
 aggregate-address 136.1.0.0 255.255.0.0
 aggregate-address 150.1.0.0 255.255.0.0 summary-only
 neighbor 136.1.23.3 remote-as 100
 neighbor 136.1.29.9 remote-as 100
 neighbor 136.1.245.5 remote-as 200
 neighbor 136.1.245.5 advertise-map ADVERTISE
non-exist-map TRACK_PPP
 no auto-summary

R2#show ip route | incl Null
B 136.1.0.0/16 [200/0] via 0.0.0.0, 00:17:18,
Null0
B 150.1.0.0/16 [200/0] via 0.0.0.0, 00:17:08,
Null0

-Missing the forest for the trees

 



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