Multicast Pings

From: John Neiberger (neiby@xxxxxxxxxx)
Date: Sat Mar 30 2002 - 01:24:23 GMT-3


   
Take a look at this. When I ping a multicast address--using a
single packet--I get multiple replies from the same IP
addresses. Why would an end station respond more than once to
a single ping?

R6#ping 224.1.1.1

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.1.1.1, timeout is 2
seconds:

Reply to request 0 from 172.16.86.8, 44 ms
Reply to request 0 from 172.16.100.3, 236 ms
Reply to request 0 from 172.16.135.1, 152 ms
Reply to request 0 from 172.16.100.5, 144 ms
Reply to request 0 from 172.16.135.1, 144 ms
Reply to request 0 from 172.16.100.5, 136 ms
Reply to request 0 from 172.16.100.3, 136 ms
Reply to request 0 from 172.16.86.8, 80 ms
Reply to request 0 from 172.16.86.8, 76 ms
Reply to request 0 from 172.16.135.1, 72 ms
Reply to request 0 from 172.16.100.5, 68 ms
Reply to request 0 from 172.16.86.8, 56 ms
Reply to request 0 from 172.16.100.3, 52 ms
R6#

I've noticed this before but I didn't really think about it
much. Now I'm really wondering why this occurs.

Do any of you know?

Thanks,
John



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