Multicast Addressing

[kishorecisco]

hi,

we all do knew that each routing protocols use different multicast addressing. During the distribution process, the packets from one routing protocol is forwarded to another routing protocol. During this process will the multicast address of one protocol will be understood by another protocol or not.

[Peter Paluch]

Hello,

A multicast address used by a routing protocol will never be "understood" or used by another routing protocol. Redistribution means that you

1. Look into your routing table for existing routes learned by a particular routing protocol X
2. Import these routes into a different routing protocol Y and advertise them in that protocol

The addressing used by different routing protocols is not changed in any way. A router performing redistribution must understand both protocols and must be actually working with both addresses - to "read" the updates on one address and "transmit" the updates on other address - of course, this analogy is very, very rough.

Best regards,

Peter