78
CONFIDENTIAL
26-Jan-04
© 2002 Procket Networks, Inc. All rights reserved.
RPF Check Example
MSDP/iMBGP mesh-peering
MSDP SA
AS1
3.1
4.2
4.1
2.1
MBGP Table router B
A Destination
Next hop
Path
* 172.16.0.2/32
>172.16.3.1
i
MSDP Peers router B
Neighbor
State/PfxRcd
172.16.3.1
1
172.16.4.1
1
RPF Success!
Who is the iMBGP peer adverting this route?
in our example 172.16.3.1
Is the MSDP == MBGP peer?
RPF rule when MSDP peer == iMBGP peer
Src
RP
A
C
B
ip pim rp-address 172.16.0.2