[c-nsp] Adjust mss on 6500

[fredrik.jacobsson at seb.se]

Hi all!

We have a couple of 6500's doing alot of encrypted GRE-tunnels.
IOS is 12.2(18)SXD7a

I'm trying to set this command on a tunnel interface:
ip tcp adjust-mss 1400

But:
XXXXXXXX(config-if)#ip tcp adjust-mss 1400
                           ^
% Invalid input detected at '^' marker.

XXXXXXXX(config-if)#ip tcp ?
  compression-connections  Maximum number of compressed connections
  header-compression       Enable TCP header compression


Is there another way to do that?
(Can't understand why it doesn't have the ajust-mss feature)

Best regards
/Fredrik Jacobsson