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[Bug 668194] dhcp client not working properly in Xen domU due to partial checksum offload

https://bugzilla.novell.com/show_bug.cgi?id=668194

https://bugzilla.novell.com/show_bug.cgi?id=668194#c20


--- Comment #20 from Marius Tomaschewski <mt@xxxxxxxxxx> 2011-02-18 17:26:59
UTC ---
FYI:
The patch does not work for me (at least the 3.1-ESV variant) as it is
on SLES-11-SP1 vs. SLES-11-SP1 with a patched package installed on both.

While _renew_ (use a short lease, e.g. 60 sec), the following messages
are shown on the server:

Feb 18 18:11:17 pollux dhcpd: 3 bad udp checksums in 5 packets
Feb 18 18:11:57 pollux dhcpd: DHCPREQUEST for 172.16.4.101 from
00:16:3e:24:17:24 (pollux1) via br4000
Feb 18 18:11:57 pollux dhcpd: DHCPACK on 172.16.4.101 to 00:16:3e:24:17:24
(pollux1) via br4000
Feb 18 18:12:08 pollux dhcpd: DHCPREQUEST for 172.16.4.101 from
00:16:3e:24:17:24 (pollux1) via br4000
Feb 18 18:12:08 pollux dhcpd: DHCPACK on 172.16.4.101 to 00:16:3e:24:17:24
(pollux1) via br4000
Feb 18 18:12:10 pollux dhcpd: DHCPDISCOVER from 00:16:3e:24:17:24 (pollux1) via
br4000
Feb 18 18:12:10 pollux dhcpd: DHCPOFFER on 172.16.4.101 to 00:16:3e:24:17:24
(pollux1) via br4000
Feb 18 18:12:16 pollux dhcpd: DHCPREQUEST for 172.16.4.101 (172.16.4.2) from
00:16:3e:24:17:24 (pollux1) via br4000
Feb 18 18:12:16 pollux dhcpd: DHCPACK on 172.16.4.101 to 00:16:3e:24:17:24
(pollux1) via br4000

(Also when dhcpcd (unpatched) is used) on the client side, the bad UDP
checksum message is logged on [dhcpcd only] whie every renew request
response (and the client fails into rebind state then)...

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