User Manual

198 Troubleshooting
2. See the comment fields in Table 34 and follow the suggested actions.
Correcting marginal links
A marginal link involves the connection between the switch and the edge device. Isolating the exact
cause of a marginal link involves analyzing and testing many of the components that make up the link
(including the switch port, switch SFP, cable, the edge device, and the edge device SFP).
To troubleshoot a marginal link:
1. Issue the portErrShow command.
Table 34 SwitchShow output and suggested action
Output Suggested action
Disabled Issue the portEnable command.
Bypassed Check the output from the portLogShow or portLogDump commands and
identify the link initialization stage where the initialization procedure went
wrong.
Loopback Check the output from portLogShow/PortLogDump commands and
identify the link initialization stage where the initialization procedure went
wrong.
E_Port If the opposite side is not another switch, the link has come up in a wrong
mode. Check the output from the portLogShow/PortLogDump commands
and identify the link initialization stage where the initialization procedure
went wrong.
F_Port If the opposite side of the link is a fabric device, the link has come up in a
wrong mode. Check the output from portLogShow or PortLogDump
commands.
G_Port The port has not come up as an E_Port or F_Port. Check the output from
portLogShow or PortLogDump commands and identify the link
initialization stage where the initialization procedure went wrong.
L_Port If the opposite side is not a loop device, the link has come up in a wrong
mode. Check the output from portLogShow or PortLogDump commands
and identify the link initialization stage where the initialization procedure
went wrong.