[c-nsp] VRF-Lite Question

[Jeff Kell]

After some experimentation, I'm more confused than ever.  So to
generalize this even a bit further:

Jeff Kell wrote:
> Siva Valliappan wrote:
>   
>> Yep.  GRE tunnelling is not supported on the C3550, C3560, C3750,
>> C3560-E, C3750-E.  So please do not use it.
>>     
>
> Which begs the question, *is* there an officially supported method of transport between a 3550/3560/3750 CE and a non-directly connected PE?  
>
> If directly connected there is always the dedicated vlans of a trunk (or subinterface) solution, but is there any other plain old layer-3 solution?

Well, even if directly connected you can't use subinterfaces.  From
http://www.ciscotaccc.com/lanswitching/showcase?case=K30523495 "Do not
configure Ethernet sub-interfaces on a switch. Configure it as a trunk,
and terminate the L3 IP interface on a Switched Virtual Interface (SVI)."

That's fine for single point-to-point hub-and-spoke, but gets downright
ugly if you're trying to setup an L3 mesh.

OK, here's a real-life example... a stack of 4 3750s with 4 VRFs spread
across them (OOB network management/monitoring, system admin, back-end
databases, and public/DMZ) to uplink to redundant 6509 PEs.  What's the
optimal uplink configuration for performance and redundancy? 
Etherchannel?  Redundant L3?  What if it's two stacks of two 3750s?

Jeff

Jeff