Limitations And Restrictions; Overview Of The Fc-Mac Driver And The Port Manager - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Overview of the FC-MAC Driver and the Port Manager

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
Table 8-1
Reason Code
Nonparticipating
PortChannel administratively
down
Suspended due to
incompatible speed
Suspended due to
incompatible mode
Suspended due to
incompatible remote switch
WWN
We recommend that you do not disable and then enable a T or TE port. This would affect all the VSANs
Note
crossing the EISL instead of just the VSAN experiencing the isolation problem.

Limitations and Restrictions

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Overview of the FC-MAC Driver and the Port Manager
This section describes the internal details of port related components in Cisco SAN-OS. Use this section
to understand the underlying functions that may be causing port related problems.
The FC-MAC driver resides in the module component of the Cisco MDS 9000 Family SAN-OS software.
It performs the following functions:
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Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
8-4
Reason Codes for Nonoperational States (continued)
You must administratively enable a port with the no shut command. When the interface is enabled,
the administrative state of the port is up. If you administratively disable an interface with the shut
command, the administrative state of the port is down, and the physical link layer state change is
ignored.
For a port to be in an up operational state where it can transmit or receive traffic, the interface must
be administratively up, the interface link layer state must be up, and the interface initialization must
be complete.
The interface cannot transmit or receive data when a port's operational state is down.
The interface is operating in TE mode when a port's operational state is trunking.
Initialization of FC-MAC ASIC.
Speed negotiation.
Link/loop port initialization and credit recovery.
Statistics collection.
Description
FL ports cannot participate in loop operations. It
may happen if more than one FL port exists in the
same loop, in which case all but one FL port in that
loop automatically enters nonparticipating mode.
The interfaces belonging to the PortChannel are
down.
The interfaces belonging to the PortChannel have
incompatible speeds.
The interfaces belonging to the PortChannel have
incompatible modes.
An improper connection is detected. All interfaces
in a PortChannel must be connected to the same
pair of switches.
Chapter 8 Troubleshooting Ports
Applicable
Mode
Only FL
ports and RL
ports
Only
PortChannel
interfaces
OL-9285-05