Overriding Bootstrap Router Updates; Configuring A Designated Router - Dell C9000 Series Networking Configuration Manual

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ip pim rp-address 1.1.1.1 group-address 224.0.0.0/4

Overriding Bootstrap Router Updates

PIM-SM routers must know the address of the RP for each group for which they have (*,G) entry.

This address is obtained automatically through the bootstrap router (BSR) mechanism or a static RP

configuration.

Use the following command if you have configured a static RP for a group. If you do not use the override

option with the following command, the RPs advertised in the BSR updates take precedence over any

statically configured RPs.

Use the override option to override bootstrap router updates with your static RP configuration.

ip pim rp-address

Examples of Viewing the Rendezvous Point (Multicast Group) Information

To display the assigned RP for a group, use the show ip pim rp command from EXEC privilege mode.

Dell#show ip pim rp

To display the assigned RP for a group range (group-to-RP mapping), use the show ip pim rp mapping

command in EXEC privilege mode.

Dell#show ip pim rp mapping

PIM Group-to-RP Mappings

Group(s): 224.0.0.0/4, Static

RP: 165.87.50.5, v2

Multiple PIM-SM routers might be connected to a single local area network (LAN) segment. One of these

routers is elected to act on behalf of directly connected hosts. This router is the designated router (DR).

The DR is elected using hello messages. Each PIM router learns about its neighbors by periodically sending a

hello message out of each PIM-enabled interface. Hello messages contain the IP address of the interface out

of which it is sent and a DR priority value. The router with the greatest priority value is the DR. If the priority

value is the same for two routers, then the router with the greatest IP address is the DR. By default, the DR

priority value is 192, so the IP address determines the DR.

Assign a DR priority value.

INTERFACE mode

ip pim dr-priority priority-value

Change the interval at which a router sends hello messages.

INTERFACE mode

ip pim query-interval seconds

Display the current value of these parameter.

PIM Sparse-Mode (PIM-SM)