[c-nsp] Required hardware question

[sargon]

I have two 4507s trunked back to a 6509, which is trunked into our 
backbone. I need to connect users into another switch behind one of 
the 4507s. That switch must perform routing, provide multiple VLANs, 
and trunk back to the 4507.

I didn't have any luck using a 3550, although I may have overlooked 
something.

What device will work?

Drawing is attached.

Thanks.

Sargon


                               trunk
                      --------   |   --------
                      |      |-------|      |
  --------   trunk    | 4507 |       |      |
  |      |------------|      |       |      |   <-----What device?
  | 6509 |------------|      |       |      |
  |      |            --------       --------
  |      |-------------
  |      |-----------||   --------
  --------   trunk   |\---|      |
                     |----| 4507 |
                          |      |
                          |      |
                          --------