Common Troubleshooting Commands In The Cli; Portchannel Issues; Cannot Configure A Portchannel - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Chapter 10 Troubleshooting PortChannels and Trunking
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

Common Troubleshooting Commands in the CLI

The following commands may be useful in troubleshooting PortChannel and trunking:
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PortChannel Issues

This section describes common PortChannel issues and includes the following topics:
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Cannot Configure a PortChannel

Symptom
Table 10-1 Cannot Configure a PortChannel
Symptom Possible Cause
Cannot configure a PortChannel autocreation is enabled.
PortChannel.
OL-9285-05
show port-channel compatibility-parameters
show port-channel summary
show port-channel database
show port-channel consistency detail
show port-channel usage
show interface
show interface trunk
show trunk protocol
Cannot Configure a PortChannel, page 10-3
Newly Added Interface Does Not Come Online In a PortChannel, page 10-4
Cannot configure a PortChannel.
Solution
Disable autocreation if you want to manually configure
PortChannels. In Device Manager, select Interfaces > FC
ALL..., select the Other tab, uncheck the
AutoChannelCreate check box, and click Apply.
Use the no channel-group auto CLI command.
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
PortChannel Issues
10-3