[c-nsp] Cisco 7200 - IOS15.1 - Port-channel

[Jason Berenson]

Greetings,

I just upgraded a Cisco 7206 NPE-400 to: 
c7200-advipservicesk9-mz.151-1.XB.bin from the latest 12.4.  I've got a 
port channel and it removed the 'channel-group 1' line from the two 
ethernet interfaces.  When I try to add them back I get:

router(config-if)#channel-group 1
Error: This interface does not allow user-settable mtu.
  Remove the mtu command from the port channel configuration
  to be able to add this interfaceto the port channel

I don't have any mtu commands on any interfaces except the defaults, 
which can't be removed.  Here's the relevant config:

interface Port-channel1
  description << TO GI9/5 10/5 >>
  no ip address
  no ip redirects
  random-detect
!
interface Port-channel1.11
  encapsulation dot1Q 11
  ip address IP 255.255.255.0
  no ip redirects
  ip ospf authentication-key 7
  ip ospf cost 1
  ip ospf dead-interval minimal hello-multiplier 4
!
interface FastEthernet0/0
  description << TO 9/5 >>
  no ip address
  no ip redirects
  no ip unreachables
  duplex full
  random-detect
  no cdp enable
!
interface FastEthernet2/0
  description << TO 10/5 >>
  no ip address
  no ip redirects
  no ip unreachables
  duplex full
  no cdp enable
!

Any tips/help would be greatly appreciated.

Thanks,
Jason