Hi Sean,
We selected version 8 because it is unused - not a standard version and
not in use by anyone.
Upinder
On Sep 12, 2013, at 10:02 AM, "Hefty, Sean" <sean.he...@intel.com> wrote:
>> We are using the RoCE ethertype in the MAC frames, and that is all of the
>> similarity between usNIC protocol and RoCE. L3 is not the GRH, but rather
>> a usNIC L3 header. Customers can distinguish between RoCE traffic and
>> usNIC traffic by looking at the version of the L3 frame. It is set to 6
>> for RoCE traffic and to 8 for usNIC traffic.
>
> I haven't kept that up to date with RoCE. Is version 8 a standard version,
> or is this just some value that Cisco selected? Hijacking the version in
> order to insert a vendor-specific header seems questionable.
>
> - Sean
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