09-25-2008 10:46 PM - edited 03-06-2019 01:36 AM
I tried to configure sub interfaces in our Cisco 2611 router as follows.
Router1(config)#interface fastEthernet 0/1.1
(config-subif)#ip address 172.16.2.0 255.255.255.0
but this gives the following error.
% Configuring IP routing on a LAN subinterface is only allowed if that
subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,
or ISL vLAN.
what was the cause for this error?
Also the router does not provide encapsulation dot1Q 2 ...... commands in the subinterface mode.
Is this router not provide this feature??
Kosala
09-25-2008 11:04 PM
Hi Kosala
You need to make sure that your IOS supports inter vlan routing feature.
If it doesnt you need to upgrade it first to configure inter vlan routing.
regds
09-25-2008 11:19 PM
You will need IOS 12.1(3)T or higher to use the "encapsulation dot1q ..." command.
There is a workaround if you are using a earlier version of IOS and are not able to upgrade the device. It can be found on the following page:
http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a00800949fd.shtml
Please rate if the post helps!
Regards,
Michael
09-28-2008 07:55 PM
But my router, the version is newer.
Pls. check the show version output....
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.3(17b), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by cisco Systems, Inc.
Compiled Mon 06-Mar-06 22:02 by dchih
Image text-base: 0x80008098, data-base: 0x80CE0844
ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)
ROM: C2600 Software (C2600-I-M), Version 12.3(17b), RELEASE SOFTWARE (fc2)
SLTiDC_DR_Router1 uptime is 6 days, 18 hours, 20 minutes
System returned to ROM by power-on
-------
Can it be the problem...?
Kosala
09-28-2008 09:15 PM
Kosala
You need a minimum feature set of IP Plus to support 802.1q subinterfaces.
Jon
09-29-2008 07:26 PM
You mean to update the IOS ??
kosala
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: