Can somone tell me what are the first versions of the IOS for the 3550 and 3560 that support IPv6. Currently my 3550's are running IOS (tm) C3550 Software (C3550-I9Q3L2-M), Version 12.1(20)EA1a, RELEASE SOFTWARE (fc1) and my 3560's are running Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(25)SEE1, RELEASE SOFTWARE (fc1)
One other question I have is are the EMI versions of code for these two switches the only ones that support IPv6?
Thanks a ton,
You need 12.2SE
The 12.2SE Cisco IOS release train consists of the Cisco Catalyst 3560, 3750, 3560E, and 3750E series.
Have a look at this link: