4000 Router Series IP Multicast Configuration Guide

ManualsBrandsHP ManualsNetwork HardwareHP MSR3024 TAA-compliant AC Router

Ste

Command Remarks

1. Enter system view.

system-view N/A

2. Enter PIM view.

pim [ vpn-instance

vpn-instance-name ]

N/A

3. Configure a multicast data

filter:

source-policy acl-number

By default, no multicast data filter is

configured.

Configuring a hello message filter

Along with the wide applications of PIM, the security requirement for the protocol is becoming

increasingly demanding. The establishment of correct PIM neighboring relationships is the prerequisite

for secure application of PIM.

To guard against PIM message attacks, you can configure a legal source address range for hello

messages on interfaces of routers to ensure the correct PIM neighboring relationships.

To configure a hello message filter:

Ste

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter interface view.

interface interface-type

interface-number

N/A

3. Configure a hello message

filter.

pim neighbor-policy acl-number

By default, no hello message filter

exists.

If a PIM neighbor's hello messages

cannot pass the filter, the neighbor

is automatically removed when its

maximum number of hello attempts

is reached.

Configuring PIM hello message options

In either a PIM-DM domain or a PIM-SM domain, hello messages exchanged among routers contain the

following configurable options:

• DR_Priority (for PIM-SM only)—Priority for DR election. The device with the highest priority wins the

DR election. You can configure this option for all the routers in a shared-media LAN that directly

connects to the multicast source or the receivers.

• Holdtime—PIM neighbor lifetime. If a router does not receive a hello message from a neighbor

when the neighbor lifetime expires, it regards the neighbor failed or unreachable.

• LAN_Prune_Delay—Delay of forwarding prune messages on a shared-media LAN. This option

consists of LAN delay (namely, prune message delay), override interval, and neighbor tracking

support (namely, the capability to disable join message suppression).

The prune message delay defines the delay time for a router to forward a received prune message

to the upstream routers. The override interval defines a period for a downstream router to override

a prune message. If the prune message delay or override interval on different PIM routers on a

shared-media LAN are different, the largest value takes effect.