RELENG_6_3 ping and DUP packets

[Damian Weber]

> From: Chuck Swiger <cswiger at mac.com>
> To: Damian Weber <dweber at htw-saarland.de>
> Cc: freebsd-stable at freebsd.org
> Subject: Re: RELENG_6_3 ping and DUP packets
> 
> On Apr 10, 2008, at 1:58 PM, Damian Weber wrote:
> > But here is the problem, pinging the machine from remote gives
> > 
> > A.B.C.X$ ping A.B.C.D
> > PING A.B.C.D (A.B.C.D): 56 data bytes
> > 64 bytes from A.B.C.D: icmp_seq=0 ttl=64 time=0.272 ms
> > 64 bytes from A.B.C.D: icmp_seq=0 ttl=255 time=0.391 ms (DUP!)
> 
> Please run "tcpdump -e icmp" on this box and repeat your testing.  It
> will be most interesting to know whether you're seeing the same MAC
> address....

good point, but it's the same

A.B.C.X# tcpdump -e icmp
tcpdump: listening on rl0, link-type EN10MB
08:41:51.136023 0:20:ed:5f:3:3b 0:19:99:33:7c:9 ip 98: A.B.C.X > A.B.C.D: icmp: echo request
08:41:51.136171 0:19:99:33:7c:9 0:20:ed:5f:3:3b ip 98: A.B.C.D: icmp: echo reply
08:41:51.136343 0:19:99:33:7c:9 0:20:ed:5f:3:3b ip 98: A.B.C.D: icmp: echo reply
08:41:52.138366 0:20:ed:5f:3:3b 0:19:99:33:7c:9 ip 98: A.B.C.X > A.B.C.D: icmp: echo request
08:41:52.138447 0:19:99:33:7c:9 0:20:ed:5f:3:3b ip 98: A.B.C.D: icmp: echo reply
08:41:52.138692 0:19:99:33:7c:9 0:20:ed:5f:3:3b ip 98: A.B.C.D: icmp: echo reply
^C
169 packets received by filter
0 packets dropped by kernel