ECS4660-28F_Management Guide-R03

C HAPTER 52 | Multicast Routing Commands
PIM Multicast Routing
– 1961 –
◆ This command is only effectively for interfaces of first hop, PIM-DM
routers that are directly connected to sources of multicast groups.
EXAMPLE
Console(config-if)#ipv6 pim state-refresh origination-interval 30
Console(config-if)#
PIM6-SM Commands
ipv6 pim
bsr-candidate
This command configures the switch as a Bootstrap Router (BSR)
candidate. Use the no form to restore the default value.
SYNTAX
ipv6 pim bsr-candidate interface vlan vlan-id
[hash hash-mask-length] [priority priority]
no ipv6 pim bsr-candidate
vlan-id - VLAN ID (Range: 1-4094)
hash-mask-length - Hash mask length (in bits) used for RP selection
(see ipv6 pim rp-candidate and ipv6 pim rp-address). The portion of
the hash specified by the mask length is ANDed with the group
address. Therefore, when the hash function is executed on any BSR,
all groups with the same seed hash will be mapped to the same RP.
If the mask length is less than 32, then only the first portion of the
hash is used, and a single RP will be defined for multiple groups.
(Range: 0-32 bits)
priority - Priority used by the candidate bootstrap router in the
election process. The BSR 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 BSR. Setting the priority to
zero means that this router is not eligible to server as the BSR. At
least one router in the PIM6-SM domain must be set to a value
greater than zero. (Range: 0-255)
DEFAULT SETTING
Hash Mask Length: 10
Priority: 0
COMMAND MODE
Global Configuration
COMMAND USAGE
◆ When the ipv6 pim bsr-candidate command is entered, the router
starts sending bootstrap messages to all of its PIM6-SM neighbors. The
IP address of the designated VLAN is sent as the candidate’s BSR
address. Each neighbor receiving the bootstrap message compares the
BSR address with the address from previous messages. If the current
address is the same or a higher address, it accepts the bootstrap
message and forwards it. Otherwise, it drops the message.