Table 10: Options Accessed in Router PIM Context
Options Accessed in Router PIM
Context
Operation
rp-candidate group-prefix
group-addr/group-mask
Enter an address and mask to define an additional multicast group or a
range of groups.
rp-candidate hold-time
30-255
Tells the BSR how long it should expect the sending C-RP router to be
operative. (Default: 150; 0 if router is not a candidate.)
rp-candidate priority
0-255
Changes the priority for the C-RP router. When multiple C-RPs are
configured for the same multicast group(s), the priority determines which
router becomes the RP for such groups. A smaller value means a higher
priority. (Default: 192)
[ no ] spt-threshold
Disable or enable the router’s ability to switch multicast traffic flows to the
shortest path tree. (Default: enabled)
join-prune-interval
5-65535
Option
: Globally change the interval for the frequency at which join and prune
messages are forwarded on the router’s VLAN interfaces. (Default: 60
seconds)
trap neighbor-loss |
hardware-mrt-full |
software-mrt-full | all
Option
: Enable or disable PIM traps. (Default: disabled)
Operating notes
Eliminating redundancy in support for a multicast group
Configuring only one router in a domain as an RP for supporting traffic for a specific multicast group
eliminates support redundancy for that group. In this case, if that router becomes unavailable, the group will
be excluded from the domain.
Excluding multicast groups
If all of the C-RPs and static RPs (if any) in a domain are configured to exclude some multicast groups or
ranges of groups, multicast traffic for such groups will be dropped when received by a DR, and will not be
forwarded to any RP. (Such groups will still be switched locally if IGMP is enabled on the VLAN where the
excluded group traffic is received from a multicast traffic source.)
Routing table entries
For multicast traffic from a source to the edge router supporting a multicast receiver requesting the traffic,
when an SPT forms, the routing table (on the edge router) will contain both of the following for the supported
group:
• (S,G) entry for the source IP address and IP multicast group address supported by the SPT.
• (*,G) entry for the "any" (wildcard) source and (same) multicast group supported by the RP tree.
Flow capacity
The router supports up to 2046 flows. A router acting as a DR or RP has a significantly higher CPU load than
other routers in a PIM-SM domain.
128
Aruba 3810 / 5400R Multicast and Routing Guide for ArubaOS-
Switch 16.08
