Solved

Error Disabled Port

Posted on 2008-10-15
3
2,116 Views
Last Modified: 2008-10-15
I have a Cisco 3560G with two GLC-GE-100FX SFP's in slots 27 & 28; current configuration:

interface GigabitEthernet0/27
 description Tsunami 45 Link
 switchport trunk encapsulation dot1q
 switchport mode trunk
 duplex full
 channel-group 1 mode desirable non-silent
!
interface GigabitEthernet0/28
 description Tsunami 54 Link
 switchport trunk encapsulation dot1q
 switchport mode trunk
 duplex full
 channel-group 1 mode desirable non-silent

Configuration for Port-Channel 1:

interface Port-channel1
 description EtherChannel for Wireless Radios
 switchport trunk encapsulation dot1q
 switchport mode trunk

Port 28 is up and running properly, however port 27 is "Port is error disabled".  The other side of this setup is a Cisco 2960 with this configuration:

interface GigabitEthernet0/23
 description Tsunami 54 Link
 switchport mode trunk
 media-type sfp
 duplex full
 channel-group 1 mode desirable non-silent
!
interface GigabitEthernet0/24
 description Tsunami 45 Link
 switchport mode trunk
 media-type sfp
 duplex full
 channel-group 1 mode desirable non-silent

Port-Channel Configuration:

interface Port-channel1
 description EtherChannel for Wireless Radios
 switchport mode trunk

Both the links on the 2960 are up and running properly.

How can I tell more specifically why port 27 is error disabled?

Thanks in Advance
0
Comment
Question by:ARSCO
  • 2
3 Comments
 
LVL 3

Accepted Solution

by:
keno44 earned 500 total points
ID: 22721952
this command

swicth#show interfaces status err-disabled

may provide some insight.

What is the port connected to?
I've seen my ports go into this state because of BPDU Guard and Filter. I usually disable those services on my switch ports that connect to non-PCs and servers.

0
 
LVL 3

Expert Comment

by:keno44
ID: 22721962
Let me clarify one thing. I usually disable spanning-tree BPDU Guard and Filter.

Ken
0
 

Author Comment

by:ARSCO
ID: 22722167
I forcibly shutdown interface 27 and brought it back on-line.  When it came up it stayed up and is now running properly with the port-channeling.

I believe it had been error disabled because of spanning tree, there were two active routes to the same location; prior to my bringing port 28 on-line.

Thanks for the help, I will have to remember that command.
0

Featured Post

Space-Age Communications Transitions to DevOps

ViaSat, a global provider of satellite and wireless communications, securely connects businesses, governments, and organizations to the Internet. Learn how ViaSat’s Network Solutions Engineer, drove the transition from a traditional network support to a DevOps-centric model.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Managing 24/7 IT Operations is a hands-on job and indeed a difficult one. Over the years I have found some simple tips and techniques to increase the efficiency of the overall operations. The core concept has always been on continuous improvement; a…
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question