What is the earliest Cisco IOS Software release that supports the EtherSwitch modules?
A. Support for the 16-port EtherSwitch NM begins with Cisco IOS Software Release 12.2(2)XT, Plus images only. Support for the 36-port EtherSwitch HDSM begins with Cisco IOS Software Release 12.2(8)T1, Plus images only. This image supports both the 16-port and the 36-port EtherSwitch on Cisco 2600, 3600, and 3700 series platforms. Support for intrachassis stacks begins with Cisco IOS Software Release 12.2(11)T, Plus images only. Support for routed port functionality begins with Cisco IOS Software Releases 12.2(15)ZJ and 12.3(4)T.