ISL trunking on 2600XM router

[peterbe]

Have been told that IP-Plus IOS is required for ISL or 802.1Q trunking on a 2600XM router. Have not found the answer on the Cisco WEB site (yet). Is this correct?

[Prashanth Krishnappa]

Yes

http://www.cisco.com/warp/public/473/50.shtml#Table2

You can also use the feature navigator

http://www.cisco.com/cgi-bin/Support/FeatureNav/FN.pl