[c-nsp] flexlink on WS-C4948 - anyone using this? Works well?

[nealr]

   I am doing a job for a customer where we have to hook a pair of 
WS-C4948 to an Occam broadband loop carrier system. The Occam product 
uses the flexlink protocol rather than spanning tree to select which 
ethernet port to activate. This supposedly produces a 50ms switchover time.

  I found this guide on Cisco's site regarding flexlink. Looks great, 
but they reference the WS-C3550 and it isn't even available on that 
platform any more. I logged into WS-C3560 and WS-C3750 I manage and they 
both have it in the latest software.

http://www.cisco.com/en/US/partner/products/hw/switches/ps646/products_configuration_guide_chapter09186a00805a704a.html


  My plan is to have a pair of WS-C4948 connected with an 802.1Q trunk 
and a single port on each switch facing an Occam BLC that will be 
running flexlink. I am not certain at this time if the Occam will be 
delivering an 802.1Q trunk or just plain ethernet. Both of those 
scenarios are options.


   I'd like to hear from anyone who has direct hands on experience with 
flexlink on any Cisco product, and in particular I'd like to hear about 
support in the current image for the WS-C4948.