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Community Member

Help with 3640 subinterface

I am running 12.0(7)XK1 on a Cisco 3640 and can not set up a subinterface on the fastethernet port on a NM1FE2W card.

After typing

config t

int fa 0/0.2

encapsulation is not an option for a command.

Do I need to upgrade from the early release version?

2 REPLIES

Re: Help with 3640 subinterface

Are you running an IP-image?

The subinterfaces on FE ports are used for inter-vlan routing. (802.1q)

This feature is only supported in IP-plus images.

Community Member

Re: Help with 3640 subinterface

Unfortunately, we are running an IP-image.

Looks like I will have to go with an upgraded 12.0 image.

Not enough memory to upgrade to 12.1.

Thanks a lot.

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