3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring Basic Functions of MSDP 617
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If an interface of the device is shared by an MSDP peer and a BGP peer at the same
time, you are recommended to configuration the same IP address for the MSDP
peer and BGP peer.
Configuring a Static RPF
Peer
Configuring static RPF peers avoids RPF check of SA messages.
Follow these steps to configure a static RPF peer:
When configuring multiple static RPF peers on the same device, observe the
following rules:
■ If you use the rp-policy keyword for all the static RPF peers, all the static RPF
peers will be activated concurrently. SA messages will be filtered as per the
configured prefix list and only those SA messages whose RP addresses pass the
filtering will be accepted. If multiple static RPF peers use the same filtering
policy at the same time, when a peer receives an SA message, it will forward
the SA message to the other peers.
■ If you use the rp-policy keyword for none of the static RPF peers, according to
the configuration sequence, only the first static RPF peer whose connection is
in the UP state will be activated, and all SA messages from this peer will be
accepted while the SA messages from other static RPF peers will be discarded.
When this active static RPF peer fails (for example, when the configuration is
removed or when the connection is torn down), based on the configuration
sequence, the next RPF peer with its connection in the UP state will be selected
as the activated RPF peer.
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CAUTION:
■ An MSDP peering connection must be created before static RPF peers can be
configured.
■ If only one MSDP peer is configured on a device, this MSDP peer will act as a
static RPF peer.
Create an MSDP peer
connection
peer peer-address
connect-interface
interface-type
interface-number
Required
No MSDP peer connection
created by default
To do... Use the command... Remarks
To do... Use the command... Remarks
Enter system view system-view -
Enter MSDP view msdp -
Configure a static RPF peer static-rpf-peer peer-address [
rp-policy ip-prefix-name ]
Required
No static RPF peer configured
by default