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You do not need new GBICs/SFPs. Also, I have run 10 gig connections over 50u riser fiber with 62.5u patch cables so you may want to try the existing cables before buying new ones. I would definitely recommend going with the 50u per your contractor ...
Take a look at the following link:http://www.cisco.com/warp/public/104/26.htmlYour links have the same network type, so that shouldn't be the problem. Are you using unnumbered links on one side? Can you provide the configs for the WAN interfaces at...
