On Sat, Feb 7, 2009 at 5:09 AM, James Harper
> Can you try disabling all offloads in Windows (checksum and large send)?
No effect. Same thing happens.
> Also try running wireshark or another traffic capture routine and see
> what that picks up. It could be getting corrupt packets or no packets at
> There could maybe be something wrong with broadcast packets... try
> adding an arp entry manually in Dom0 for DomU and then try pinging it.
After adding static arp, wireshark on domU shows it sends ICMP echo
packets but doesn't receive anything (not even corrupted packets).
tcpdump on dom0 shows something interesting though.
05:58:02.333904 IP (tos 0x0, ttl 128, id 41, offset 0, flags [none],
proto: ICMP (1), length: 60) 192.168.129.99 > 192.168.129.89: ICMP
echo request, id 512, seq 1280, length 40
05:58:02.334044 IP (tos 0x0, ttl 255, id 64313, offset 0, flags [DF],
proto: ICMP (1), length: 60) 192.168.129.89 > 192.168.129.99: ICMP
echo reply, id 512, seq 1280, length 40
the ICMP reply (which domU never got) has [DF] flag. Is this normal?
Is this MTU-related issue?
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