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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
454
0 Specifies the Prefix Count value of the wildcard address (224.0.0.0/24) to be set to 0
in PIM C-RP-Adv message.
1 Specifies that the wildcard prefix count value will be set to 1 in PIM C-RP-Adv
message.
Default
No candidate RP is configured. The default CRP-Adv interval is 60 seconds. The
default priority value is 192. The default wildcard prefix count is 0.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 8. (EI Mode Only Command)
Usage Guideline
This command is used to configure candidate RP information of PIM. The change of
CRP-Adv interval would also change the hold time of the CRP at the RP. And the
hold time at RP is CRP-Adv interval times 2.5.
It is possible to have the cast, multiple CRP mapping to the same groups. At this
situation, the method below is used.
1. Perform longest match on group-range to obtain a list of RPs.
2. From this list of matching RPs, find the one with highest priority. Eliminate any
RPs from the list that have lower priorities.
3. If only one RP remains in the list, use that RP.
4. If multiple RPs are in the list, use the PIM hash function to choose one.
So, you can use this command to configure the priority of this CRP to specify the
sequence to select the RP for the groups.
This command can cause the router to send a PIM Version 2 message advertising
itself as a candidate RP to the BSR and set the parameter of this CRP. To specify an
interface as the candidate RP of a specific group, execute this command with ACL.
One interface can only configure one ACL. The number of ACL entry configured to
candidate RP is limited, and the total number of group range configured to candidate
RP is also limited. If any limitation exceeded, no more candidate RP can be created.
To verify your configuration, use show ip pim.
Example
This example shows how to configure the candidate RP interface ‘vlan2’ with group
range 234.0.0.0/12, and priority set to 100.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#ip pim rp-candidate vlan2 priority 100 group-list crp-acl
DXS-3600-32S(config)#ip standard access-list crp-acl
DXS-3600-32S(config-ip-acl)#permit 234.0.0.0/12
DXS-3600-32S(config-ip-acl)#
Example
This example shows how to set the CRP configuration back to default.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#no ip pim rp-candidate vlan2
DXS-3600-32S(config)#
Example
This example shows how to configure the PIM wildcard prefix count to be 1.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#ip pim rp-candidate vlan2 wildcard-prefix-cnt 1
DXS-3600-32S(config)#
Example
This example shows how to delete all CRP ACL lists binded on the interface ‘vlan2’.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#no ip pim rp-candidate vlan2
DXS-3600-32S(config)#
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