46-27
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 46 Configuring IP Multicast Routing
Configuring IP Multicast Routing
To remove the PIM device configured as the candidate RP, use the no ip pim send-rp-announce
interface-id global configuration command. To remove the switch as the RP-mapping agent, use the no
ip pim send-rp-discovery global configuration command.
Step 3
ip pim send-rp-announce interface-id
scope ttl group-list access-list-number
interval seconds
Configure another PIM device to be the candidate RP for local groups.
• For interface-id, enter the interface type and number that identifies
the RP address. Valid interfaces include physical ports, port
channels, and VLANs.
• For scope ttl, specify the time-to-live value in hops. Enter a hop
count that is high enough so that the RP-announce messages reach
all mapping agents in the network. There is no default setting. The
range is 1 to 255.
• For group-list access-list-number, enter an IP standard access list
number from 1 to 99. If no access list is configured, the RP is used
for all groups.
• For interval seconds, specify how often the announcement messages
must be sent. The default is 60 seconds. The range is 1 to 16383.
Step 4
access-list access-list-number {deny |
permit} source [source-wildcard]
Create a standard access list, repeating the command as many times as
necessary.
• For access-list-number, enter the access list number specified in
Step 3.
• The deny keyword denies access if the conditions are matched. The
permit keyword permits access if the conditions are matched.
• For source, enter the multicast group address range for which the RP
should be used.
• (Optional) For source-wildcard, enter the wildcard bits in dotted
decimal notation to be applied to the source. Place ones in the bit
positions that you want to ignore.
Recall that the access list is always terminated by an implicit deny
s
tatement for everything.
Step 5
ip pim send-rp-discovery scope ttl Find a switch whose connectivity is not likely to be interrupted, and
assign it the role of RP-mapping agent.
For sc
ope ttl, specify the time-to-live value in hops to limit the RP
discovery packets. All devices within the hop count from the source
device receive the Auto-RP discovery messages. These messages tell
other devices which group-to-RP mapping to use to avoid conflicts (such
as overlapping group-to-RP ranges). There is no default setting. The
range is 1 to 255.
Step 6
end Return to privileged EXEC mode.
Step 7
show running-config
show ip pim rp mapping
show ip pim rp
Verify your entries.
Display active RPs that are cached with associated multicast routing
en
tries.
Display the information cached in the routing table.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
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