Extreme devices support PIM over secondary addresses in an IPv4 environment by using an IPv4 address with a secondary keyword.
When a secondary address is configured on a interface, all secondary addresses on the interface are sent out on the PIM Hello using the secondary address option.
When a receiver uses a secondary address as its source and sends a IGMP group report, the PIM Join and Prune messages are propagated up the network.
When a secondary address is configured as a Rendezvous Point (RP), the packets are processed appropriately.
In this example, the PIM neighbor on VE10 has multiple IP addresses configured on the interface.
device# show ip pim neighbor
Total Number of Neighbors : 1
Port Phy_Port Neighbor Holdtime Age UpTime Priority
sec sec Dd HH:MM:SS
Ve10 Ve10 10.10.10.17 105 10 00:26:10 1
+20.20.20.21