User guide

Configuring PIM Configuring IPv6 PIM
OmniSwitch AOS Release 7 Advanced Routing Configuration Guide March 2015 page 7-41
over which configuration is overridden by this static configuration. If the priority option has been defined,
a value of 65535 can be used to unset the priority
You can also specify whether or not this static RP configuration to override the dynamically learned RP
information for the specified group using the override parameter. As specifying the priority value obso-
letes the override option, you can use either the priority or override parameter only.
Use the no form of this command to delete a static RP configuration.
-> no ipv6 pim static-rp ff0e::1234/128 2000::1
To view current Static RP Configuration settings, use the show ipv6 pim static-rp command.
Group-to-RP Mapping
Using one of the mechanisms described in the sections above, an IPv6 PIM-SM router receives one or
more possible group-range-to-RP mappings. Each mapping specifies a range of IPv6 multicast groups
(expressed as a group and mask), as well as the RP to which such groups should be mapped. Each
mapping may also have an associated priority. It is possible to receive multiple mappings—all of which
might match the same multicast group. This is the common case with the BSR mechanism. The algorithm
for performing the group-to-RP mapping is as follows:
1 Perform longest match on group-range to obtain a list of RPs.
2 From this list of matching RPs, find the one with the 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-SM hash function defined in the RFC to choose one. The
RP with the highest resulting hash value is then chosen as the RP. If more than one RP has the same high-
est hash value, then the RP with the highest IPv6 address is chosen.
This algorithm is invoked by a DR when it needs to determine an RP for a given group, such as when
receiving a packet or an IGMP membership indication.