[ovs-dev] [PATCH 1/8] gre: Disable checksums by default.

Jesse Gross jesse at nicira.com
Wed Aug 18 16:48:40 UTC 2010


On Wed, Aug 18, 2010 at 12:18 PM, Ben Pfaff <blp at nicira.com> wrote:

> On Wed, Aug 18, 2010 at 12:08:45AM -0700, Jesse Gross wrote:
> > GRE checksums aren't really all that useful because they only
> > add value for the GRE and inner Ethernet header.  However, they
> > are expensive since they cover the entire packet, even though
> > most of the data is protected by L3 and L4 checksums.  Therefore
> > disable checksumming by default to improve performance.  In addition,
> > since CAPWAP doesn't support checkums this makes it consistent with
>
> "checksums"
>

Hmm, "checkums" sounds like the Southern version of checksums...


>
> > GRE.
>
> Looks good.  Would it be worthwhile to explain the tradeoff, as you do
> above, in vswitch.xml?
>

Good idea, I added that.
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