Outbound Route Filtering

Hi group,
R1(AS1)-------------------R2(AS2).

R2 have prefix that need to advertise to R1. Then i configured R1 as send
mode & prefix-list in & R2 as received mode. Everything working fine &
config as follow.

R1#sh run | b router bgp
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 neighbor 10.1.1.2 remote-as 2
 neighbor 10.1.1.2 capability orf prefix-list send
 neighbor 10.1.1.2 prefix-list 20 in
 no auto-summary
!
ip prefix-list 20 seq 5 permit 172.16.1.0/24

*****

R2#sh run | b router bgp
router bgp 2
 no synchronization
 bgp log-neighbor-changes
 network 172.16.1.0 mask 255.255.255.0
 network 192.168.1.0
 neighbor 10.1.1.1 remote-as 1
 neighbor 10.1.1.1 capability orf prefix-list receive
 no auto-summary
!

But is it possible R2 will advertise prefix & control what prefix to be
advertise with ORF feature. means without touching anything at R1(even don't
configure send mode) ???

And when do we need to use " neighbor x.x.x.x capability orf prefix-list
both" ???

I already browse at cco doc but still confusing send&receive mode.

Please, and appreciate for advice
Regards

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Received on Mon May 18 2009 - 02:38:44 ART