Avaya 8800 Planning And Engineering page 174

Multicast network design
• As a redundancy option, you can configure several RPs for the same group in a PIM
domain.
• As a load sharing option, you can have several RPs in a PIM-SM domain map to different
groups.
• Configure an RP to map to all IP multicast groups. Use the IP address of 224.0.0.0 and
the mask of 240.0.0.0.
• Configure an RP to handle a range of multicast groups by using the mask parameter. For
example, an entry for group value of 224.1.1.0 with a mask of 255.255.255.192 covers
groups 224.1.1.0 to 224.1.1.63.
• In a PIM domain with both static and dynamic RP switches, you cannot configure one of
the (local) interfaces for the static RP switches as the RP. For example, in the following
scenario:
(static rp switch) Sw1 ------ Sw2 (BSR/Cand-RP1) -----Sw3
you cannot configure one of the interfaces on switch Sw1 as static RP because the BSR
cannot learn this information and propagate it to Sw2 and Sw3. PIM requires that you
consistently set RP on all the routers of the PIM domain, so you can only add the remote
interface Candidate-RP1 (Cand-RP) to the static RP table on Sw1.
• If a switch needs to learn an RP-set, and has a unicast route to reach the BSR through
this switch, Static RP cannot be enabled or configured on a switch in a mixed mode of
candidate RP and static RP switches. For examples, see the following two figures.
174 Planning and Engineering — Network Design November 2010