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From: Florian Westphal <fw@strlen.de>
To: Satish Patel <satish.txt@gmail.com>
Cc: Florian Westphal <fw@strlen.de>, netdev@vger.kernel.org
Subject: Re: Linux kernel error stack
Date: Sun, 5 Aug 2018 23:01:21 +0200	[thread overview]
Message-ID: <20180805210121.holfmbbkqywpp3zd@breakpoint.cc> (raw)
In-Reply-To: <CAPgF-fpexjxysOAT7j0fg1KL1sZ--z_4Zc+O9dCBaqyyKQ3-+A@mail.gmail.com>

Satish Patel <satish.txt@gmail.com> wrote:
> After reading further related DHCP checksum issue, it seems we need
> that rules when you running DHCP on same host machine where your guest
> using host DHCP service, in that case virtual nic won't do checksum.
> If your DHCP running on different host then your physical nic perform
> checksum.

Partially right, its only needed for older dhcp software that relies
on packet-header checksum correctness (metadata contains info when
checksum will be filled in by nic later, modern servers will
use that and ignore the packet-header checksums in this case).

If you remove the rule and your VMs still get leases via DHCP then
the CHECKSUM workaround isn't needed.

  reply	other threads:[~2018-08-05 23:07 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-05  1:24 Linux kernel error stack Satish Patel
2018-08-05  9:48 ` Florian Westphal
2018-08-05 12:43   ` Satish Patel
2018-08-05 19:42     ` Florian Westphal
2018-08-05 19:54       ` Satish Patel
2018-08-05 19:56         ` Satish Patel
2018-08-05 20:01           ` Satish Patel
2018-08-05 20:02           ` Florian Westphal
2018-08-05 20:09             ` Satish Patel
2018-08-05 20:15               ` Satish Patel
2018-08-05 20:39                 ` Satish Patel
2018-08-05 20:53                   ` Satish Patel
2018-08-05 21:01                     ` Florian Westphal [this message]
2018-08-05 21:03                 ` Florian Westphal
2018-08-05 23:06                   ` Michal Kubecek
2018-08-05 23:15                     ` Florian Westphal
2018-08-06  0:06                       ` Michal Kubecek
2018-08-06  0:19                         ` Florian Westphal

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