On 7/22/16 9:47 AM, Tom Herbert wrote:
On Jul 22, 2016 11:44 AM, "Tom Herbert" <[email protected]
<mailto:[email protected]>> wrote:
>
> On Jul 22, 2016 3:38 AM, "Dino Farinacci" <[email protected]
<mailto:[email protected]>> wrote:
> >
> > > - VXLAN-GPE does not appear compatible with VXLAN-GPE. If a
VXLAN host receives a VXLAN packet for some protocol other than Ethern
the payload will be misinterpreted. A separate port number was
required. I assume that a user using VXLAN in HW must upgrade HW to
use VXLAN-GPE
> >
> > Tom, one clarification. Did you really mean VXLAN-GPE is not
compatible with VXLAN-GPE or did you mean VXLAN?
> >
> Yes
>MB
That is to day VXLAN-GPE is not compatible with VXLAN.
We have had in the past the discussion about forward/backward
compatibility, and IMO it wasn't very productive.
I observe that a VXLAN-GPE packet that carries an ethernet frame can be
parsed by a VXLAN receiver (provided UDP port is properly configured). I
think some implementors/deployers may take advantage of this property,
but this is a minor point.
What I think is important, and it was one of the design goals of
VXLAN-GPE, is that an implementation of VXLAN-GPE includes an
implementation of VXLAN at no additional cost. This is one of the
reasons that makes VXLAN-GPE attractive for HW implementations.
Fabio
> > This is how a VXLAN-GPE encapsulator (an upgraded system) can talk
to a VXLAN decapsulator (an existing system) with the LISP control-plane:
> >
> > (1) The encapsulator does a lookup on a MAC address to the mapping
system.
> > (2) What gets retunred is the decapsultor’s IP address and an
encapsulation format. In this case the encapsulation format is VXLAN.
> > (3) The VXLAN-GPE supuported encapsulator then encapsulates
packets with UDP port 4789.
> >
> > I am told you can do this with BGP as well by negotiating what
encapsulations are supported.
> >
> > Dino
> >
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