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8-5
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 8 Troubleshooting Ports
Overview of the FC-MAC Driver and the Port Manager
• Error handling (mainly by acting on error interrupts).
• SFP detection and housekeeping.
• Statistics collection.
• Debug command support under the show hardware internal fc-mac command on the module.
The FC-MAC driver does not handle FLOGI, RSCN, or configuration management.
This section includes the following topics:
• Port Manager Overview, page 8-5
• Troubleshooting Port States with the Device Manager, page 8-6
• Isolating Port Issues Using Device Manager, page 8-9
• Using Port Debug Commands, page 8-10
• Useful Commands at the FC-MAC Level, page 8-11
Port Manager Overview
The Port Manager is management software running on the supervisor module. The Port Manager handles
the following tasks:
• Port configuration management.
• Link events, including notifying the registered application on the supervisor module.
• E or TE port initialization.
• SFP validation.
The FC-MAC detects the port is in one of the following states:
• Disable—The port is administratively disabled.
• Enable—The port is administratively enabled. In this state, the port may be in speed initialization,
loop-initialization, link (point-to-point connection) initialization, or the link-up state.
• HW Failure—The port has been declared bad due to a hardware failure.
• Pause—An intermediate state after the link is down and subsequent enabling of the port to start the
port initialization.
You can check the state of the port by attaching to the module using the command:
show hardware internal fc-mac port port port-info
Note You must use the attach module CLI command to access these FC-MAC show commands.
The FLOGI server is a separate application that handles the FLOGI processing for Nx ports.
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