rbx10, 224.0.0.0-255 multicast addresses are translated into L2 addresses the same way as the rest of the multicast addresses. For Ethernet, the MAC address becomes 0100.5e followed by the last 23 bits of the multicast IP address.
Take 224.0.0.1. Last 23 bits are 0000000 00000000 00000001. Translate the last 23-bits back into hexadecimal (00.0001). The MAC address becomes 0100.5e00.0001. The fact that the multicast packets will never leave the segment (routers never forward the packets, TTL=1 as a failsafe) does not affect how the L2 addresses are derived. - Tom rbx10 Defcom wrote: > I understande how Multicast routers should not forward any multicast > datagram with destination addresses in this range (224.0.0.0 - 224.0.0.255 ) > bec. of ttl not able the address to go to the next hop. > But I dont' remember how those addresses are translated to L2 addresses. Or > maybe I'm not reading into it...or the link local terminology is throwing me > off. > > Thanks all for you answers. > rbx10Priscilla Oppenheimer wrote: Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=71693&t=71577 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
