Graceful Shutdown; Setting The Interface Administrative State - Cisco MDS 9000 Series Configuration Manual

Fibre Channel Interfaces
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

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:
•
•
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.
A graceful shutdown is not possible in the following situations:
•
•
•
This feature is only triggered if both switches at either end of this E port interface are MDS switches and
Note
are running Cisco SAN-OS Release 2.0(1b) or later, or MDS NX-OS Release 4.1(1a) or later.

Setting the Interface Administrative State

To gracefully shut down an interface, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface fc1/1
Step 3
switch(config-if)# shutdown
To enable traffic flow, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface fc1/1
Step 3
switch(config-if)# no shutdown
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
2-12
If you shut down an interface.
If a Cisco NX-OS software application executes a port shutdown as part of its function.
If you physically remove the port from the switch.
If in-order delivery (IOD) is enabled (for information about IOD, refer to the Cisco MDS 9000
Family NX-OS Fabric Configuration Guide).
If the Min_LS_interval interval is higher than 10 seconds (for information about FSPF global
configuration, refer to the Cisco MDS 9000 Family NX-OS Fabric Configuration Guide).
Purpose
Enters configuration mode.
Selects a Fibre Channel interface and enters interface
configuration submode.
Gracefully shuts down the interface and administratively
disables traffic flow (default).
Purpose
Enters configuration mode.
Selects a Fibre Channel interface and enters interface
configuration submode.
Enables traffic flow to administratively allow traffic when
the no prefix is used (provided the operational state is up).
OL-19445-02, Cisco MDS NX-OS Release 4.2(x)
Chapter 2 Configuring Interfaces