On 09/05/2012 08:26, Robert Raszuk wrote:
If switches were to try to distribute GRE flows between two VTEPs
that used a GRE encapsulation, all the traffic would be directed to
use only one link within these Port Channels.
Not true. GRE encapsulation is not mandated to use the same src/dst
addresses for all flows between given two end points.
You do not need to parse deep into packet to enable good load
balancing hash across parallel links when you use GRE as an
encapsulation technology.
And what is nice about IP encapsulation all GRE src/dst addresses can
be naturally aggregated so from IGP point of view they still look like
a single prefix.
Regards,
R.
Robert
I think that this needs some serious study rather than assertion,
because it is not at all obvious what the LB properties of either method
will be in a DC.
In the case of the use of multiple GRE addresses there are operational
and route scaling issues that also need to be considered.
Stewart
