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ambi
Beginner

Multicast mac of a routed packet

Experts have a basic question 

I know for a unicast packet the destination mac keeps changing every hop. What happens in case of a multicast packet?

does the mac keeps changing or the multicast mac is maintained 

Ambi 

2 REPLIES 2
Richard Burts
Hall of Fame Guru

Ambi

Interesting question which I had not thought about before. Since the multicast MAC is derived using the multicast IP destination address I would expect that the multicast MAC address to be maintained hop by hop.

HTH

Rick

HTH

Rick

Indeed a good question 

As rick said the multicast mac will be maintained across the hop 

you can quickly lab it up and check 

Narayan