vlan tagging cisco 6506e

[tdl]

hi

      we have cisco 6506e with adv enterprise 15.1sy os. we create subinterface and try to tag another vlan but second encapsulation command not present...

any  help  to get solution for it

[Philip D'Ath]

Are you trying to do QinQ?

http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_ieee_802.1q.html

interface FastEthernet a/b/c.xxx
  encapsulation dot1q xxx second-dot1q yyy

[tdl]

thanx for reply but this command not work in cisco 6506e...

os 15.1 sy1

pl. help