Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 86

SAN Port Channels
S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .
Newly added Fibre Channel interface does not come online in a SAN Port
Channel
When a new Fibre Channel interface is added, it does not come online in a SAN port channel.
The following error message during the configuration operation may appear.
Command failed: port not compatible [reason]
Possible Cause
Port channel mode is configured as on.
If you use the default ON mode to avoid inconsistent states across switches and to maintain consistency
across switches, then the ports shut down.
Solution
Explicitly enable the ports again using the no shutdown command.
Possible Cause
Interface parameters are not compatible with the existing SAN port channel.
Solution
Use the force option to force the physical interface to take on the parameters of the SAN port channel.
In the interface sub-configuration mode, use the channel-group <channel-group number> force
command.
Cannot configure trunking
Trunking cannot be configured under the interface configuration mode.
The following error message may appear in the CLI output:
error:invalid switchport config
Possible Cause
Trunking protocol is disabled.
Solution
Enable trunking by using the trunk protocol enable CLI command.
VSAN traffic does not traverse trunk
The VSAN traffic is not able to traverse the trunk.
A host cannot gain access to a target that is on the same VSAN and connected to two different switches
using TE ports. The VSAN traffic is not able to traverse the trunk. Depending on the path from host to
target, you may observe a performance degradation or you may not be able to access any disks.
Possible Cause
VSAN is not listed in the allowed-active VSAN list.
Solution
Cisco Nexus 5000 Series Troubleshooting Guide
5-14
Chapter 5 Troubleshooting SAN Switching Issues
OL-25300-01