Who Me Too'd this topic

hi everybody

i have router 3925 with IOS version c3900-universalk9-mz.SPA.156-3.M4.bin

Technology Package License Information for Module:'c3900'

------------------------------------------------------------------------
Technology    Technology-package                  Technology-package
              Current              Type           Next reboot
------------------------------------------------------------------------
ipbase        ipbasek9             Permanent      ipbasek9
security      None                 None           None
uc            uck9                 Permanent      uck9
data          datak9               Permanent      datak9

and i'm trying create xconnect on sub port channel interfacem, but i can't do it, under sub interface configuration mode absent context xconnect:

(config)#int po1.100
(config-subif)#en
(config-subif)#encapsulation do
(config-subif)#encapsulation dot1Q 100
(config-subif)#x
(config-subif)#x?
% Unrecognized command

how to create xconnect on sub port-channel?