Cisco 7600 subinterface bridging

I want to bridge vlans together on two different sub interfaces on a Cisco 7600. For instance...

int Gi3/1.6
  descr xxxx
  encap dot1Q 6
  ip address x.x.x.x x.x.x.x
  bridge-group 6
end

int Gi3/31.6
  descr xxxx
  encap dot1Q 6
Command rejected: VLAN 6 not available

It seems you cannot have two subinterfaces on the same dot1q vlan? Help.
LVL 3
TYoungAsked:
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Nayyar HH (CCIE RS)Network ArchitectCommented:
I think what you need to do it to use a unique VLAN numbers then brigde the two sub-infs together using a bridge-group.
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TYoungAuthor Commented:
unfortunate, i want to use vlan 6 for each, i dont see why this isnt possible on the 7600s.... you can do this on the cisco ML1000s...
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Justin EllenbeckerIT DirectorCommented:
I found this on another site that is the identical problem to yours.  According to the reading this is a known limitation of the 7600 the topic goes on the describe some workarounds or other solutions that may fit your needs.

http://www.gossamer-threads.com/lists/cisco/nsp/99661
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TYoungAuthor Commented:
Thanks guys
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