Do secondary IP addresses on a Layer 3 interface support the PIM protocol

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Secondary IP addresses on a Layer 3 interface do not support the PIM protocol. Multicast data packets sent from the network segment of a secondary IP address will fail the reverse path forwarding (RPF) check. As a result, multicast data from this network segment cannot reach the network segment of multicast users.

Other related questions:
Do Layer 3 Ethernet interfaces support IPSG
Layer 3 Ethernet interfaces do not support IPSG. Only Layer 2 Ethernet interfaces support IPSG.

How to bind IP addresses with MAC addresses on the Layer 3 interface of a router
The IP Source Guard can be configured only on a Layer 2 interface. Use the following preventive measures: 1. Configure static ARP entries. 2. Configure an ACL to allow IP packets that are bound with the static ARP entries to be released.

How do I check binding between IP addresses and MAC addresses on a Layer 3 interface
IP source guard can be configured only on a Layer 2 interface, so the following solution is used: 1. Create static ARP entries. 2. Configure ACLs to allows only IP packets matching static ARP entries to pass through.

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