This is not really a question - just curious to to the thoughts out there on pushing L3 out to the edge vs L2 when you're running vss? Some caveats: VLANs are (generally) restricted to a single port (ie each access switch/idf has it's own vlan, so vlans are not spanned out multiple ports). Access switches (primarily 4510 or 3750x) are port-channeled to the vss distro's (6509s):
With VSS:
pros to L2:
not dependent on spanning tree
no blocked links
no need for a FHRP.
cost
a vlan can be spanned out multiple ports if needed
cons to L2:
poor man's load-balancing (dependent on your port-channel configuration)
link may be up but not able to pass traffic w/out switch knowing (ie, less intelligence)
pros to L3
true load balancing
quick convergence
troubleshooting - more/better tools for trouble-shooting closer to the edge.
increased QoS functionality
cons to L3
cost - this can get absorbed in a larger closet, but in large campuses, the cost can be substantial
cannot span a vlan to multiple ports
Personally, cost not being issue, I like the idea of running 1q trunking with point-to-point L3, but this also allows a vlan that may need to be spanned to multiple ports if needed.
