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ping -b => DUP !



Hi,

We have duplicated packets when we use the command :
           ping -b broadcast_adrress.

We send this command from a PC under linux with two network (eth1 /eth0).
Only one MCM 2+8 is connected to eth1.

What this DUP ! messages mean ? (see attached file)

The messages are correct if we use the ping directly to the MCM.

Also if we try ping -b with fewer MCMs on the same network the MCMs become
unreachable !

Regards,

Claude

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 Claude GIRERD - Service Electronique
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PING 172.16.5.255 (172.16.5.255) from 172.16.4.1 : 56(84) bytes of data.
64 bytes from 172.16.4.1: icmp_seq=0 ttl=255 time=86 usec
64 bytes from 172.16.4.241: icmp_seq=0 ttl=64 time=440 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=1 ttl=255 time=49 usec
64 bytes from 172.16.4.241: icmp_seq=1 ttl=64 time=387 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=2 ttl=255 time=50 usec
64 bytes from 172.16.4.241: icmp_seq=2 ttl=64 time=357 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=3 ttl=255 time=38 usec
64 bytes from 172.16.4.241: icmp_seq=3 ttl=64 time=388 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=4 ttl=255 time=50 usec
64 bytes from 172.16.4.241: icmp_seq=4 ttl=64 time=359 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=5 ttl=255 time=56 usec
64 bytes from 172.16.4.241: icmp_seq=5 ttl=64 time=403 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=6 ttl=255 time=38 usec
64 bytes from 172.16.4.241: icmp_seq=6 ttl=64 time=383 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=7 ttl=255 time=50 usec
64 bytes from 172.16.4.241: icmp_seq=7 ttl=64 time=361 usec (DUP!)
64 bytes from 172.16.4.1: icmp_seq=8 ttl=255 time=46 usec
64 bytes from 172.16.4.241: icmp_seq=8 ttl=64 time=396 usec (DUP!)

--- 172.16.5.255 ping statistics ---
9 packets transmitted, 9 packets received, +9 duplicates, 0% packet loss
round-trip min/avg/max/mdev = 0.038/0.218/0.440/0.169 ms