We have 6500 with IOS version "c6sup22-jsv-mz.121-26.E8.bin". 6500 has one 8-port GBIC blade and a few 48-port GE-TX blades.
On GBIC port "switchport trunk encapsulation dot1q/isl" can be configured. But on GE-TX, there is no command opiton for that.
How can we cofigure trunking on GE-TX port?