Edge-Core ECS4620-28T Quick Start Manual page 777

Compute hash value based on the group address, RP address, priority, and
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hash mask included in the bootstrap messages.
If there is a tie, use the candidate RP with the highest IP address.
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This distributed election process provides faster convergence and minimal
disruption when an RP fails. It also serves to provide load balancing by
distributing groups across multiple RPs. Moreover, when an RP fails, the
responsible RPs are re-elected on each router, and the groups automatically
distributed to the remaining RPs.
◆
To improve failover recovery, it is advisable to select at least two core routers in
diverse locations, each to serve as both a candidate BSR and candidate RP. It is
also preferable to set up one of these routers as both the primary BSR and RP.
Parameters
These parameters are displayed:
◆
VLAN – Identifier of configured VLAN interface. (Range: 1-4094)
◆
Interval – The interval at which this device advertises itself as an RP candidate.
(Range: 60-16383 seconds; Default: 60 seconds)
◆
Priority – Priority used by the candidate RP in the election process. The RP
candidate with the largest priority is preferred. If the priority values are the
same, the candidate with the larger IP address is elected to be the RP. Setting
the priority to zero means that this router is not eligible to server as the RP.
(Range: 0-255; Default: 0)
◆
Group Address – An IP multicast group address. If not defined, the default
address is 224.0.0.0/4, or the entire IPv4 multicast group.
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Group Mask – Subnet mask that is used for the group address.
Web Interface
To advertise the switch as an RP candidate:
1.
Click Multicast, Multicast Routing, SM.
2.
Select RP Candidate from the Step list.
3.
Specify a VLAN interface, the interval at which to advertise the router as an RP
candidate, the priority to use in the election process, and the multicast group
address and mask indicating the groups for which this router is bidding to
become the RP.
4.
Click Apply.
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Chapter 20
| Multicast Routing
Configuring PIM for IPv4