User Manual UMN:CLI
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10.3.6 IPv6 SPT Switchover
PIM-SM provides the switching option to deliver multicast traffic on the SPT. Multicasting
over the SPT may be more efficient than multicasting over the RPT, since it can
substantially reduce the network latency.
When the switching option is enabled, once multicast traffic from sources arrives at the
DR, the switchover to the SPT then occurs. This option only provides the binary option,
meaning that the switching to the SPT occurs either when receiving the first multicast
packet, or not at all; it is not rate-based. You can enable this option only for specified
multicast groups using access lists.
To enable the switchover to the IPv6 SPT, use the following command.
Enables the switchover to IPv6 SPT.
ipv6 pim spt-threshold group-
list WORD
Enables the switchover to IPv6 SPT for specified
multicast groups.
WORD: IPv6 access list name (<1-99>)
To disable the switchover to the IPv6 SPT, use the following command.
no ipv6 pim spt-threshold
Disables the switchover to IPv6 SPT.
WORD: IPv6 access list name (<1-99>)
no ipv6 pim spt-threshold
group-list WORD
The switchover to the IPv6 SPT to deliver multicast traffic is disabled by default.
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