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Community Member

Configuring VLAN subinterfaces on a 2621 router

Hi guys,

I need to confirm something here regarding the configuration of subinterfaces on a Cisco 2621 router, ISO version 12.3 (26).  When I attempt to configure subinterfaces I get an "Invalid Input Detected" message when attempting to configure the dot1q encapsulation for a configured VLAN 10 on one of my switches.  Example:  (I am in the router here, of course.)

Home(config)#int fa0/1.10

Home(config-subif)#encapsulation dot1q 10

                  ^

% Invalid input detected at '^' marker.

Home(config-subif)#

I have done this several times in class and have no problem with this in Packet Tracer, so I am wondering if there is an issue with the ISO version on the router that is giving me problems?

Thanks,

Steve

12 REPLIES
Green

Configuring VLAN subinterfaces on a 2621 router

Steve,

can you post the sho version from your router.

I have feeling your feature set does not support 802.1Q trunking

Regards

Alex

Regards, Alex. Please rate useful posts.
Community Member

Re: Configuring VLAN subinterfaces on a 2621 router

Hey Alex,

Here is the show ver:

Home#show ver
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 15:23 by dchih

ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

Home uptime is 18 hours, 3 minutes
System returned to ROM by reload
System restarted at 06:35:21 CDT Tue Apr 17 2012
System image file is "flash:c2600-i-mz.123-26.bin"

cisco 2621 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory
.
Processor board ID JAD05370JPE (2501765479)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
2 FastEthernet/IEEE 802.3 interface(s)
2 Serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Home#                                    

Silver

Re: Configuring VLAN subinterfaces on a 2621 router

Hi Steve,

Alex is right.

Your IOS might not support encapsulation command at all. I have just tested it on c2600-i-mz.123-26.

Best regards,

Jan

Green

Configuring VLAN subinterfaces on a 2621 router

Hi,

Using the Cisco software adviser

You need the IP-PLUS feature set

c2600-is-mz.12.3-26

Regards

Alex

Regards, Alex. Please rate useful posts.
Silver

Re: Configuring VLAN subinterfaces on a 2621 router

Hi Alex,

nice to know. Thanks for new information. Cisco software adviser is not free available tool, is it?

Best regards,

Jan

Green

Configuring VLAN subinterfaces on a 2621 router

Jan,

If you have a CCO account try this link

http://tools.cisco.com/Support/Fusion/FusionHome.do

Regards

Alex

Regards, Alex. Please rate useful posts.
Silver

Re: Configuring VLAN subinterfaces on a 2621 router

Alex,

Thanks but I am student, I test everything in our university lab. So I don't have this type of account. But thanks for information!

Best regards,

Jan

Cisco Employee

Re: Configuring VLAN subinterfaces on a 2621 router

Hi Jan,

Well, you do have a guest-level CCO account, otherwise you would not be able to post here on CSC and be awarded with your new shiny bronze star! By the way, congratulations! You absolutely deserved that. Thanks for joining the CSC and please keep up the good work you're doing!

So try out that link. And more: There is a Cisco Feature Navigator tool at http://cisco.com/go/fn - also worthy of trying.

Best regards,

Peter

Silver

Re: Configuring VLAN subinterfaces on a 2621 router

Hi Peter,

I thought CCO account is only for customers. Well I tried it out but i keep getting "Forbidden File or Application" although I am logged in. The second link works.

Peter, thank you very much!!!

Best regards,

Jan

Community Member

Re: Configuring VLAN subinterfaces on a 2621 router

Hey Jan,

I just posted the show ver for Alex just in case.

I am having a sinking suspicion it is the IOS version, (this is the way my week's been going.)  In any case, can you still download a newer version of the IOS for the 2621 router?   Strange as it may sound, I have two different vlans I would like to set up at home.  I have one of my switches alread set up with port ranges, security and such, sooo.....

In any case, thanks to all who have lent me their knowledge here.  I am in the last phase of my CCNA training at college and I guess I am one of the luckier students.  I built a lab at home so I can suffer through and experience these real world unexpected scenarios.

Regards all,

Steve

Green

Re: Configuring VLAN subinterfaces on a 2621 router

Steve,

Your IOS is System image file is "flash:c2600-i-mz.123-26.bin"

This is the IP BASE version

You need IP-PLUS c2600-is-mz.123-26.bin to run 802.1Q trunking features

HTH

Alex

Please rate useful posts

Regards, Alex. Please rate useful posts.
Silver

Re: Configuring VLAN subinterfaces on a 2621 router

Steve,

As  Alex said - your suspicion is in place. Your IOS does not support features that you want to implement - you have to replace it.

Good luck in your CCNA training!!!

Best regards,

Jan

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