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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 2 Configuring Interfaces
Information About Interfaces
Graceful Shutdown
Interfaces on a port are shut down by default (unless you modified the initial configuration).
The Cisco NX-OS software implicitly performs a graceful shutdown in response to either of the
following actions for interfaces operating in the E port mode:
• If you shut down an interface.
• If a Cisco NX-OS software application executes a port shutdown as part of its function.
A graceful shutdown ensures that no frames are lost when the interface is shutting down. When a
shutdown is triggered either by you or the Cisco NX-OS software, the switches connected to the
shutdown link coordinate with each other to ensure that all frames in the ports are safely sent through
the link before shutting down. This enhancement reduces the chance of frame loss.
Isolation due to ELP failure The port negotiation failed. Only E ports
and TE ports
Isolation due to ESC failure The port negotiation failed.
Isolation due to domain
overlap
The Fibre Channel domains (fcdomain) overlap.
Isolation due to domain ID
assignment failure
The assigned domain ID is not valid.
Isolation due to the other side
of the link E port isolated
The E port at the other end of the link is isolated.
Isolation due to invalid fabric
reconfiguration
The port is isolated due to fabric reconfiguration.
Isolation due to domain
manager disabled
The fcdomain feature is disabled.
Isolation due to zone merge
failure
The zone merge operation failed.
Isolation due to VSAN
mismatch
The VSANs at both ends of an ISL are different.
Nonparticipating 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.
Only FL
ports and TL
ports
PortChannel administratively
down
The interfaces belonging to the PortChannel are down. Only
PortChannel
interfaces
Suspended due to incompatible
speed
The interfaces belonging to the PortChannel have
incompatible speeds.
Suspended due to incompatible
mode
The interfaces belonging to the PortChannel have
incompatible modes.
Suspended due to incompatible
remote switch WWN
An improper connection is detected. All interfaces in a
PortChannel must be connected to the same pair of
switches.
Table 2-4 Reason Codes for Nonoperational States (continued)
Reason Code (long version) Description
Applicable
Modes
