02-19-2007 05:21 PM - edited 03-05-2019 02:27 PM
Hey all,
I am assisting the Cisco CCNA semester 3 students with a lab. The students are using the white and green CCNA 3 and 4 Lab Companion Third Edition book. I am on page 171 step B. When I get to the step to configure the router with "encapsulation dot1q 1", I get an invalid command error. The encapsulation option does not even show up in the ? list. Any thoughts? The only thing I can think of is the IOS version. The other 2600's in our lab do the same thing. Please see the attached file for a copy/paste of the commands that were input, including a sh run.
02-19-2007 05:58 PM
Upgrade the IOS.
02-19-2007 06:04 PM
Hello Tavis
You must be running the IP base version of IOS... for trunking to be supported, you must need atleast IP Plus version !!! If you have access to the software advisor on CCO, you can get a list of IOS which supports trunking. You can also include the features you want and get the IOS versions...
Hope this helps.. all the best...
Raj
02-19-2007 06:10 PM
Hello Tavis,
I just ran the software advisor, and it gave the following results (for dot1q trunking support):
1) c2600-ipbase-mz.12.3-4.XD1 - (not sure if available for download)
2) c2600-is-mz.12.3-22 - available for download
3) c2600-is-mz.12.2-15.T7 - available
the IOS requires atleast 64 MB DRAM and 32 MB Flash..
Hope this helps.. all the best.. rate replies if found useful..
Raj
02-19-2007 06:39 PM
Thanks for your quick replies and confirmation that it was the IOS that was the issue, Raj.
I have these IOS images on hand:
c2600-ipbase-mz.123-6e.bin
c2600-is-mz.122-24a.bin
c2600-is-mz.122-5.bin
I will try these on one of the 2600 routers tomorrow and see if it will work.
02-19-2007 06:48 PM
Hello Tavis,
Try the second IOS (IP Plus) and it will work. I just checked your software on the tool, and it gave dot1q trunking support for it. I'm really not sure if it will be enabled for the IP Base IOS that you have given... If you have sufficient DRAM and flash, please go for the is-mz-122.24a image...
Raj
11-20-2013 11:09 AM
Hi Raj,
Thanks ever so much! Tried various IOS images which sort of should've supported encapsulation and none of those had the encapsulation functionality... Luckily I found this post, changed the IOS image to c2600-is-mz.12.3-22 and voila! Can carry on with my lab!!!
On the other hand - had very interesting experience uploading IOS files to flash
Thanks again!
Regards,
Tadas
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