02-28-2006 07:33 AM - edited 03-03-2019 02:02 AM
Hi,
we have cisco 6509(catOS) & 3750(IOS), while etherchanneling between them, ports are getting err-disabled in 3750, below are the configuration.
Cisco 3750
interface gig 1/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
interface gi 2/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
Cisco 6509
set port channel 3/4 445
set port channel 3/5 447
set trunk 3/4 on dot1q 1-1005,1025-4094
set trunk 3/5 on dot1q 1-1005,1025-4094
set port channel 3/4-5 mode on
with this configuration, when i connect, within a minute the ports gets err-disabled in 3750, any changes to be made in the above said configuration?
02-28-2006 07:49 AM
Hi Anand,
Can you confirm if your modules 3 on your cat6k is gig module or 10/100 module?
It is going into errdisable state due to some etherchannel problem and that can be due to negotiation also.
Regards,
Ankur
02-28-2006 08:07 AM
on cisco 6509 the 3rd module is WS-X6408A-GBIC which has got fiber, port is getting disabled only 3750 not on 6509.
02-28-2006 08:22 AM
Hi Ankur,
actually i resolved the problem, just because the admin group value is different it has disabled, when i made it as equal, it started working fine, i mean admin group ID i meade in cisco 6509. thanks for the effort
05-09-2006 10:13 AM
I'm pretty sure that the 2 ports on the 6509 have to be in the same admin group. In your example, the 2 ports are in seperate admin groups (445 and 447). Try configuring the admin group to be the same for the 2 interfaces.
6509
set port channel 3/4,3/5 448
I've never had much luck allowing the 6509 to put the ports into admin groups on it's own. I've had much better luck assigning the admin group explicitly.
05-09-2006 04:01 PM
I think if you had set up the channels as desirable and let the switches negotiate they would not have this problem , you only see this when channels are forced on. From what i have read it is best practice to set up the trunks and channels as desirable and let them negotiate the trunks and channels. I have never seen a problem with channel or trunk negotiation and myself try to avoid forcing them on .
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide