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
Configuring a Designated Router
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.
EXEC Privilege mode
show ip pim interface
Creating Multicast Boundaries and Domains
A PIM domain is a contiguous set of routers that all implement PIM and are configured to operate within
a common boundary defined by PIM multicast border routers (PMBRs).
PMBRs connect each PIM domain to the rest of the Internet.
Create multicast boundaries and domains by filtering inbound and outbound bootstrap router (BSR)
messages per interface. The following command is applied to the subsequent inbound and outbound
updates. Timeout removes existing BSR advertisements.
• Create multicast boundaries and domains by filtering inbound and outbound BSR messages per
interface.
ip pim bsr-border
• Remove candidate RP advertisements.
clear ip pim rp-mapping
PIM Sparse-Mode (PIM-SM) 677