Configuring Auto-Rp - Cisco 3845 - Security Bundle Router Software Manual
Software configuration guide
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Chapter 33
Configuring IP Multicast Routing
Command
Step 3
access-list access-list-number {deny |
permit} source [source-wildcard]
Step 4
end
Step 5
show running-config
Step 6
copy running-config startup-config
To remove an RP address, use the no ip pim rp-address ip-address [access-list-number] [override]
global configuration command.
This example shows how to configure the address of the RP to 147.106.6.22 for multicast
group 225.2.2.2 only:
Switch(config)# access-list 1 permit 225.2.2.2 0.0.0.0
Switch(config)# ip pim rp-address 147.106.6.22 1
Configuring Auto-RP
Auto-RP uses IP multicast to automate the distribution of group-to-RP mappings to all Cisco routers and
multilayer switches in a PIM network. It has these benefits:
•
•
•
If you configure PIM in sparse mode or sparse-dense mode and do not configure Auto-RP, you must
Note
manually configure an RP as described in the
on page
Note
If routed interfaces are configured in sparse mode, Auto-RP can still be used if all devices are configured
with a manual RP address for the Auto-RP groups.
OL-23400-01
Purpose
Create a standard access list, repeating the command as many times as
necessary.
Recall that the access list is always terminated by an implicit deny
statement for everything.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
It is easy to use multiple RPs within a network to serve different group ranges.
It provides load splitting among different RPs and arrangement of RPs according to the location of
group participants.
It avoids inconsistent, manual RP configurations on every router and multilayer switch in a PIM
network, which can cause connectivity problems.
33-22.
•
For access-list-number, enter the access list number specified in
Step 2.
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 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.
"Manually Assigning an RP to Multicast Groups" section
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring IP Multicast Routing
33-23
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