Cisco IOS version 12.1(3r)T2

[christianman]

running on a 2620 router is not allowing me to create subinterfaces on the Fa0/0 interface. Serson running is IOS (tm) C2600 Software (C2600-I-M), Version 12.3(5), RELEASE SOFTWARE (fc1). Basically when configuring a subinterface, say fa0/0.2, the encapsulation command is not allowed. Is this a problem with this version or is it a syntx issue? I have successfully created and configured subinterfaces on another 2620 running an older IOS (tm) C2600 Software (C2600-D-M), Version 12.1(5)T9, RELEASE SOFTWARE (fc1) so this leads me to believe it's either an IOS bug or my command is not correct. thanks for the help.

 

[GeneralDzur]

Sounds like an IOS bug to me.

- stephan

 

[christianman]

General,

thanks for your response. What I discovered so far is that one issue appears to be a command syntax problem. So far all the documentation I found conveys using either dot1Q, dot1q and dot1 Q for configuring subinterfaces on FA0/0 fastethernet interface. Playing with variations of this command, I found the 2620 router accepts the syntax "dot" followed by a space then either the number 1, 2, 3 etc to indicate the vlan you want to associated the dot1Q encapsulation applied to. I have to work it a bit more but I think I'm making headway.

thanks