[c-nsp] Cisco 7200 - IOS15.1

Discussion:

[c-nsp] Cisco 7200 - IOS15.1 - Port-channel

Jason Berenson

2010-04-12 19:30:34 UTC

Greetings,

I just upgraded a Cisco 7206 NPE-400 to:
c7200-advipservicesk9-mz.151-1.XB.bin from the latest 12.4. I've got a
port channel and it removed the 'channel-group 1' line from the two
ethernet interfaces. When I try to add them back I get:

router(config-if)#channel-group 1
Error: This interface does not allow user-settable mtu.
Remove the mtu command from the port channel configuration
to be able to add this interfaceto the port channel

I don't have any mtu commands on any interfaces except the defaults,
which can't be removed. Here's the relevant config:

interface Port-channel1
description << TO GI9/5 10/5 >>
no ip address
no ip redirects
random-detect
!
interface Port-channel1.11
encapsulation dot1Q 11
ip address IP 255.255.255.0
no ip redirects
ip ospf authentication-key 7
ip ospf cost 1
ip ospf dead-interval minimal hello-multiplier 4
!
interface FastEthernet0/0
description << TO 9/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
random-detect
no cdp enable
!
interface FastEthernet2/0
description << TO 10/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
no cdp enable
!

Any tips/help would be greatly appreciated.

Thanks,
Jason
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Billy Guthrie

2010-04-13 00:41:05 UTC

Permalink

Jason,

Very possible that you ran into a bug; I would try removing
channel-group from the FastE interfaces, remove the port-channel
interfaces, add the port-channels back in and then add the channel-group
back onto the FastE interfaces.

Good luck
Billy

Post by Jason Berenson
Greetings,
c7200-advipservicesk9-mz.151-1.XB.bin from the latest 12.4. I've got
a port channel and it removed the 'channel-group 1' line from the two
router(config-if)#channel-group 1
Error: This interface does not allow user-settable mtu.
Remove the mtu command from the port channel configuration
to be able to add this interfaceto the port channel
I don't have any mtu commands on any interfaces except the defaults,
interface Port-channel1
description << TO GI9/5 10/5 >>
no ip address
no ip redirects
random-detect
!
interface Port-channel1.11
encapsulation dot1Q 11
ip address IP 255.255.255.0
no ip redirects
ip ospf authentication-key 7
ip ospf cost 1
ip ospf dead-interval minimal hello-multiplier 4
!
interface FastEthernet0/0
description << TO 9/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
random-detect
no cdp enable
!
interface FastEthernet2/0
description << TO 10/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
no cdp enable
!
Any tips/help would be greatly appreciated.
Thanks,
Jason
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Arie Vayner (avayner)

2010-04-13 06:12:56 UTC

Permalink

Jason,

This looks like CSCte69575 "Etherchannel on HWIC-1FE not working."

I suggest you open a TAC case about it, to verify that this is the same
case (the above bug is for the 2900 platform, but my guess these are the
same).
Also, I am not sure right now in which release the fix is integrated.
TAC should be able to help you with that too.

Tnx
Arie

-----Original Message-----
From: cisco-nsp-***@puck.nether.net
[mailto:cisco-nsp-***@puck.nether.net] On Behalf Of Jason Berenson
Sent: Monday, April 12, 2010 22:31
To: cisco-***@puck.nether.net
Subject: [c-nsp] Cisco 7200 - IOS15.1 - Port-channel

Greetings,

I just upgraded a Cisco 7206 NPE-400 to:
c7200-advipservicesk9-mz.151-1.XB.bin from the latest 12.4. I've got a
port channel and it removed the 'channel-group 1' line from the two
ethernet interfaces. When I try to add them back I get:

router(config-if)#channel-group 1
Error: This interface does not allow user-settable mtu.
Remove the mtu command from the port channel configuration
to be able to add this interfaceto the port channel

I don't have any mtu commands on any interfaces except the defaults,
which can't be removed. Here's the relevant config:

interface Port-channel1
description << TO GI9/5 10/5 >>
no ip address
no ip redirects
random-detect
!
interface Port-channel1.11
encapsulation dot1Q 11
ip address IP 255.255.255.0
no ip redirects
ip ospf authentication-key 7
ip ospf cost 1
ip ospf dead-interval minimal hello-multiplier 4
!
interface FastEthernet0/0
description << TO 9/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
random-detect
no cdp enable
!
interface FastEthernet2/0
description << TO 10/5 >>
no ip address
no ip redirects
no ip unreachables
duplex full
no cdp enable
!

Any tips/help would be greatly appreciated.

Thanks,
Jason
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Jason Berenson

2010-04-15 19:04:26 UTC

Permalink

Well, I downgraded to the latest 12.4 (c7200-is-mz.124-25c.bin). Same
symptoms. Any ideas? I tried removing the port-channel and re-adding
too, no luck.

-Jason

Billy Guthrie

2010-04-16 00:06:25 UTC

Permalink

Jason,

Please provide a
show version
show inventory
show controllers fast0/0
show controllers fast2/0

Thanks
Billy

Post by Jason Berenson
Well, I downgraded to the latest 12.4 (c7200-is-mz.124-25c.bin). Same
symptoms. Any ideas? I tried removing the port-channel and re-adding
too, no luck.
-Jason

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Billy Guthrie

2010-04-16 00:53:15 UTC

Permalink

Jason,

I found this:

CSCsc62963

Symptoms: The interface MTU is not user configurable. When you attempt
to configure the interface level command mtu command, the following
message is printed:

% Interface {Interface Name} does not support user settable mtu.

Conditions: The symptom is observed with a 2-port FE on a Cisco 7200
series router.

Workaround: There is no workaround.

Says it was fixed in Version 12.4(25c), also applies to the 2-port FE;
however, it states to remove the mtu setting on the port-cahnnel could
still very well be related to a variant of the bug. I was about to
configure the FastE interface using Version 12.2(33)SRD4, so as
suggested, I would open a case with TAC as it clearly appears to be a bug.

Good Luck
Billy

Post by Jason Berenson
Well, I downgraded to the latest 12.4 (c7200-is-mz.124-25c.bin). Same
symptoms. Any ideas? I tried removing the port-channel and re-adding
too, no luck.
-Jason

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Oliver Boehmer (oboehmer)

2010-04-16 07:41:15 UTC

Permalink

The fix is not in 12.4(25c), will be in 25d. As indicated off-list,
please use 15.0(1)M2 to get the fix, or downgrade to a release which
doesn't have CSCsc62963 integrated, which caused the regression (for
example 12.4(25a) or earlier)..

oli

Post by Jason Berenson
Well, I downgraded to the latest 12.4 (c7200-is-mz.124-25c.bin). Same
symptoms. Any ideas? I tried removing the port-channel and re-adding
too, no luck.
-Jason

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