On Wed, Jul 13, 2016 at 09:16:20AM -0500, chris annonch wrote:
> Hello all,
>
> On page 99 the documentation states that if oxm_hasmask is set to 1 that
> when setting a field with oxm_value, oxm_mask is used.
>
> The documentation further states that for each 1 bit in oxm_mask, the
> corresponding bit is written in, and for each 0 in oxm_mask the header
> field is preserved.
>
> Does this mean that the if if the vlan field is 01 0000 0000 0000
>
> oxm_mask = 00 0000 0000 0001
>
> oxm_value = 00 0000 0000 0001
>
> that the resulting vlan after processing should be: 01 0000 0000 0001 ?
That would be true for any other field that is modifiable, but the VLAN
field is special, see this sentence on the same page:
In an OXM_OF_VLAN_VID set-field action, the OFPVID_PRESENT bit must
be a 1-bit in oxm_value and in oxm_mask.
Thus, a conformant switch will reject the set_field that you describe.
> Or does the original vlan get clobbered?
No.
> If anyone has experience with this I would really appreciate your input.
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