Sub-Int and Encapsulation

Answered Question
Jan 5th, 2009


I have the following routers ...

2650 and two 2620s running c2600-i-mz.123-26.bin. THe problem is that when I create a sub-interface the option for encapsulation is not there. If I am not mistaken, the IOS is the most current release for the routers for IP services and is advertised by cisco to work for both routers. Is it not a part of that IOS or is this caused by something else?

2650 -

2620 -

Thanks in advance,


I have this problem too.
0 votes
Correct Answer by Jon Marshall about 7 years 9 months ago


You have the wrong feature set. You need a minimum of IP PLUS to support 802.1q encapsulation - see this link (table 2)

c2600-i-mz.123-26.bin = IP

c2600-is-mz.123-26.bin = IP Plus

Upgrade to IP Plus and the encapsulation command will be available.


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