Example: Preventing Join Messages To False Rps; Example: Configuring Candidate Bsrs - Cisco Catalyst 2960-XR Configuration Manuals

Configuring PIM
Switch(config)# access-list 20 permit 224.0.0.0 15.255.255.255
The mapping agent accepts candidate RP announcements from only two devices, 172.16.5.1 and 172.16.2.1.
The mapping agent accepts candidate RP announcements from these two devices only for multicast groups
that fall in the group range of 224.0.0.0 to 239.255.255.255. The mapping agent does not accept candidate
RP announcements from any other devices in the network. Furthermore, the mapping agent does not accept
candidate RP announcements from 172.16.5.1 or 172.16.2.1 if the announcements are for any groups in the
239.0.0.0 through 239.255.255.255 range. This range is the administratively scoped address range.
Related Topics
Setting Up Auto-RP in a New Internetwork, on page 50
Adding Auto-RP to an Existing Sparse-Mode Cloud, on page 52
Auto-RP, on page 40
Filtering Incoming RP Announcement Messages, on page 55

Example: Preventing Join Messages to False RPs

If all interfaces are in sparse mode, use a default-configured RP to support the two well-known
groups 224.0.1.39 and 224.0.1.40. Auto-RP uses these two well-known groups to collect and distribute
RP-mapping information. When this is the case and the ip pim accept-rp auto-rp command is configured,
another ip pim accept-rp command accepting the RP must be configured as follows:
Switch(config)# ip pim accept-rp 172.10.20.1 1
Switch(config)# access-list 1 permit 224.0.1.39
Switch(config)# access-list 1 permit 224.0.1.40
Related Topics
Preventing Join Messages to False RPs, on page 55

Example: Configuring Candidate BSRs

This example shows how to configure a candidate BSR, which uses the IP address 172.21.24.18 on a port as
the advertised BSR address, uses 30 bits as the hash-mask-length, and has a priority of 10.
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# ip address 172.21.24.18 255.255.255.0
Switch(config-if)# ip pim sparse-dense-mode
Switch(config-if)# ip pim bsr-candidate gigabitethernet1/0/2 30 10
Related Topics
Configuring Candidate BSRs, on page 61
PIM v2 BSR, on page 42
OL-29426-01
Catalyst 2960-XR Switch IP Multicast Routing Configuration Guide, Cisco IOS Release 15.0(2)EX1
Example: Preventing Join Messages to False RPs
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