On 2/16/2011 10:49 AM, Benjamin Lovell wrote:
If you look at the spec sheets you will notice a few differences. MAC table 
size, default DRAM, routing performance, etc
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet09186a0080159856.html

Most of the other differences are very small and scenario specific. Some could 
even be as minor as some errata required a software workaround in 3B but where 
then addressed in 3C. These are not the kinds of things we doc publicly. Some 
less minor ones off the top of my head that *may be documented but not in a 
single doc that contrasts 3B and 3C.

support for vlan hash on etherchannel
VSS - only 3C cards can be the VSL in a VSS setup.
VSS - only 3C cards and compatible service modules can be used in a VSS setup, AFAIK. (the C variation includes the local/peer chassis bit.)

pt

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