No "encapsulation" command on IOS 12.2(12a) ??

Show Version:

Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3620-I-M), Version 12.2(12a), RELEASE SOFTWARE (fc1)

flash image:
System image file is "flash:c3620-i-mz.122-12a.bin"

I'm trying to configure a FastEthernet sub interface for 802.1q VLANs, but
theres no encapsulation command. I've googled it up for about 2 hours and
have come up with nothing... the following command sequence is documented
dozens of times:

As shown on:
interface fastethernet slot/port.subinterface-number
encapsulation dot1q vlanid

Any help would be appreciated.

int ethernet 0/0.0
encap 802.1q 532

You can't spec the encap on the parent interface. You must do it on the sub int.


This is what is for. You need a "plus" version
for VLAN support on the 3620. i.e. IP Plus, Enterprise Plus, etc. Your
IP version below doesn't include the feature you're looking for.

You have an IP-only image as shown by the c3620-i in the filename. For
VLAN support you need at least an "Plus" image. Depending on your hardware
this may require more RAM and/or flash.