Inter VLAN routing with a 2611 router

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I'm working through the CCNA & I've reached the point of configuring 802.1Q
on routers. I have a 2611 router which is connected via a 10Meg ethernet
connection to my 2650 switch (which in turn is connected to another 2650
switch). Unfortunately when I try to configure sub interfaces as per the
text in my book I'm receiving this error message:

'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.'

I've tried many different combinations of commands on the interface &
subinterfaces but the CLI doesn't even recognise the 'encapsulation'
command, I'm thinking that something needs to be configured globally but
I'm not sure, certainly my book hasn't indicated that. I've searched the
Cisco web site & also my CCNA Command quick reference guide but with no joy
in solving the problem, can anyone point out where I'm going wrong?

TIA, Jase.

Re: Inter VLAN routing with a 2611 router
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There's only a few IOS images that support 802.1Q encapsulation on
your 2611 router.

Search in the feature navigator for 'IEEE 802.Q VLAN Trunking' feature
for your router.

Part of knowing cisco is knowing their website for finding
information. Find the feature navigator and find the images that
support that feature.. :)

Most likely, you'll have to upgrade to one of the images returned to
support what you want to do.

Re: Inter VLAN routing with a 2611 router
Jason schrieb:
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Which IOS release and feature set are you running on that machine?
IIRC dot1q is only supported in IP Plus or better on that platform.

--
Please excuse my bad English/German/French/Greek/Cantonese/Klingon/...

Re: Inter VLAN routing with a 2611 router

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Sorry I should've posted this with the original question:

GROUCHO#show version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.2(27), RELEASE SOFTWARE
(fc3)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Tue 02-Nov-04 23:44 by kellmill
Image text-base: 0x8000808C, data-base: 0x80A1F47C

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

GROUCHO uptime is 2 hours, 21 minutes
System returned to ROM by reload
System image file is "flash:c2600-i-mz.122-27.bin"

cisco 2611 (MPC860) processor (revision 0x203) with 61440K/4096K bytes of
memory.
Processor board ID JAD04420E7O (4253923018)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
2 Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Re: Inter VLAN routing with a 2611 router

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Which isn't a version that supports 802.1Q. You'll have to upgrade,
and consult the Feature Navigator like I previously posted to find
which images do support that feature.


Re: Inter VLAN routing with a 2611 router
I don't believe that the 2610 or 2611 support 802.1q because they have only
10MB interfaces.  The Ethernet controller doesn't support the larger packet
sizes required for the tag.  You need a 2610XM or 2611XM which have 10/100
interfaces.  The 2610 and 2611 also don't do full duplex, (again because it
isn't supported by the Ethernet controller) even though you can configure it
on the interfaces.  A "show interface" will say the interface is "10/full"
but in fact it is only "10/half".

The rule of thumb for dot1q support on Cisco routers is that if the
interface doesn't do full duplex, it also doesn't do dot1q.


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Re: Inter VLAN routing with a 2611 router
Thrill5 wrote:
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Then forgot what you believe in and try to gather some info before
bashing other people, because you're simply wrong:
http://www.cisco.com/en/US/products/hw/routers/ps259/prod_bulletin09186a00800921e4.html

--
"Don't expect me to cry for all the     |               Łukasz Bromirski
  reasons you had to die" -- Kurt Cobain |    http://lukasz.bromirski.net

Re: Inter VLAN routing with a 2611 router
Chill out and stop being an ass, I wasn't bashing anyone.  I said (and you
quote) "I don't believe...." which means "I'm not sure", which is why I
stated it that way.  If I was 100% sure I would have said that.

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http://www.cisco.com/en/US/products/hw/routers/ps259/prod_bulletin09186a00800921e4.html
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Re: Inter VLAN routing with a 2611 router
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Thats incorrect for the trunking. I have done dotQ trunking on a 2610
with the proper IOS image loaded. At the time I had done it, there was
only one or two loads that could do it, but I see from FN that there
are several now.

I think people came to this conclusion because I know of no other
vendor that supports dotQ on a 10Mbps interface, so people didn't
think it was possible.


Re: Inter VLAN routing with a 2611 router

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I've managed to get some versions of IOS that support 802.1q for my router.
Unfortunately I don't have enough storage to run any of them from flash,
but I have successfully run one of the new images via TFTP, so I should be
OK to switch between the two images as required for my studies. Thanks for
the info about 'Feature Navigator' on Cisco's site too, a very useful tool.

Cheers, Jase

Re: Inter VLAN routing with a 2611 router
wrote:
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You should just have to create a subif fa 0/1.1 then enter it and
encap dotq

If that doesnt work, more then likely it is not apart of the image you
are using.

Re: Inter VLAN routing with a 2611 router
would someone just the name of an image that supports this?


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Re: Inter VLAN routing with a 2611 router

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The one that I'm using is:

c2600-is-mz.121-27b.bin

I think you need to look in Cisco's feature finder for images that are
listed as 'IP PLUS' for your router.

Hope that helps you, Jase

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