Does an AR learn the source MAC address of multicast packets

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The AR learns MAC addresses of received multicast packets.

Other related questions:
Can multicast packet source MAC addresses be learned
Yes, multicast packet source MAC addresses can be learned.

Why are source MAC addresses not learned
The causes are as follows: -The device does not receive packets because the link is Down, the interface does not join the VLAN, the interface participates in spanning tree calculation and is blocked, and so on. -Loops cause MAC address flapping. -MAC address learning is disabled or corresponding Sticky MAC address entries already exist. -The number of learned MAC address entries has reached the maximum. -The static or blackhole route is configured.

Cause why an AR cannot learn correct MAC address entries
The possible causes are as follows: - The AR does not receive packets because the link is Down, the interface does not join the VLAN, the interface participates in spanning tree calculation and is blocked, or MAC address flapping detection is configured and the interface or MAC address is blocked. - Loops cause MAC address flapping. - The AR is disabled from learning MAC address entries or the sticky MAC function is enabled on the interface. - The number of learned MAC address entries has reached the maximum. - The static or blackhole route is configured.

Can the virtual MAC address be used as the source MAC address of packets
Yes. By default, the firewall uses the physical MAC address to encapsulate Layer-3 service packets. To use the virtual MAC address, run the vrrp virtual-mac enable command in the interface view.

Do AR series routers support forwarding packets by multicast MAC addresses
No, AR series routers do not support forwarding packets by multicast MAC addresses.

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