Date: Mon, 27 Feb 2017 17:48:13 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-xen@FreeBSD.org Subject: [Bug 188990] [xen] dhclient(8) does not accept DHCP Offer on FreeBSD 10 as Xen DomU Guest Message-ID: <bug-188990-23905-IWVVs7W27p@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-188990-23905@https.bugs.freebsd.org/bugzilla/> References: <bug-188990-23905@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D188990 --- Comment #11 from Bhavesh Davda <bhavesh.davda@gmail.com> --- (In reply to Roger Pau Monn=C3=83=C2=A9 from comment #9) Yes, in a FreeBSD 11.0 VM, I had already verified this workaround works: in /etc/rc.conf: ifconfig_XN0=3D"DHCP -rxcsum" Note that you only need to disable Rx checksum offload, as the issue is with UDP BOOTP packets received with an offloaded but "invalid" UDP checksum. However, I expect this workaround to have an unnecessary performance impact= on receive packet throughput over xn0; basically you're using a 'big hammer' to completely disable an offload only because one application (dhclient) can't deal with a couple of UDP packets. More comments in a separate update... --=20 You are receiving this mail because: You are the assignee for the bug.=
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