display msdp rpf-peer

Function

The display msdp rpf-peer command displays information about all Reverse Path Forwarding (RPF) peers of a specific source Rendezvous Point (RP) address, including RPF peer selection rules and RPF route types.

Format

display msdp [ vpn-instance vpn-instance-name | all-instance ] rpf-peer original-rp original-rp-address

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Displays information about all RPF peers of a specific source RP address in a specified VPN instance. vpn-instance-name specifies the VPN instance name.	The value is a string of case-sensitive characters.
all-instance	Displays information about all the RPF peers of a specific source's RP address in all instances.	-
original-rp original-rp-address	Displays information about all the RPF peers of a specific source's RP address. original-rp-address specifies the source's RP address.	The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

To prevent Source Active (SA) messages from being forwarded circularly between MSDP peers, MSDP performs RPF check on received SA messages to control the incoming SA messages. SA messages that do not comply with RPF rules are discarded.

The display msdp rpf-peer command is used to check whether the forwarding path of SA messages works properly. Based on the RPF peer information in the command output, you can check every hop in the forwarding path. If the forwarding path is works improperly, this command helps you locate the faulty node.

Before configuring this command, confirm that MSDP peers are configured. Only the MSDP peers with Up TCP connection can become RPF peers.

A device does not perform the RPF peer check on the SA messages received from an MSDP peer in the following situations:

The address of the MSDP peer is the RP address of the source.
The MSDP peer is a static RPF peer of the device.
The MSDP peer is a unique MSDP peer of the device.
The MSDP peer has joined a full-mesh group. It is a member of a mesh group.

Example

# Display information about RPF peers of the source RP 1.1.1.1 in the public network instance.

<sysname> display msdp rpf-peer original-rp 1.1.1.1
MSDP RPF peer information of VPN-Instance: public net
 MSDP RPF peer information for Original RP: 1.1.1.1
 01. RPF peer: 6.6.6.6
  RPF selection rule: Peer is IGP next hop of best route
  RPF used topology: default
  RPF route type: multicast(static)

**Table 1** Description of the display msdp rpf-peer original-rp command output
Item	Description
MSDP RPF peer information of VPN-Instance	VPN instance to which MSDP peer information belongs
MSDP RPF peer information for Original RP	Information about the MSDP RPF peer of a specific source's RP address
01. RPF peer	RPF peer address
RPF selection rule	RPF peer selection rule
RPF used topology	RPF used topology
RPF route type	RPF route type