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
18
Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(1)
OL-25090-01
Downgrading Your Cisco MDS SAN-OS Software Image
–
show running-config | include fc-tunnel
to check the current Fibre Channel tunnel
configuration
–
no interface fc-tunne
l
y
to delete a Fibre Channel tunnel on the switch that is the source for the
Fibre Channel tunnel
–
show interface brief | include SD
to check the current configuration for a SPAN destination
port configuration
–
show interface brief | include ST
to check the current configuration for a SPAN target port
configuration
–
no fc-tunnel tunnel-map
z
interface
x/y
to remove an Fibre Channel tunnel map
–
no switchport mode sd
to negate the SPAN destination port mode for the SPAN destination port
–
no switchport mode st
to negate the SPAN target port mode for the SPAN target port
General Downgrading Guidelines
Follow these general guidelines before you perform a a software downgrade:
•
Issue the system
no acl-adjacency-sharing
execute command to disable ACL adjacency usage on
Generation 2 and Generation 1 modules. If this command fails, reduce the number of zones, IVR
zones, TE ports, or a combination of these in the system and issue the command again.
•
Disable all features not supported by the downgrade release. Use the
show incompatibility system
downgrade-image
command to determine what you need to disable.
•
Use the
show install all impact
downgrade-image
command to determine if your downgrade will
be nondisruptive.
•
Be aware that some features impact whether a downgrade is disruptive or nondisruptive:
–
FCoE:
Fibre Channel over Ethernet requires Cisco NX-OS Release 5.2(1). A downgrade from
Release 5.2(1) disrupts and stops all FCoE traffic.
–
Fibre Channel Ports
:
Fibre Channel ports
can be nondisruptively downgraded without
affecting traffic on the ports. See
Table 13
for the nondisruptive downgrade path for all SAN-OS
releases.
–
Gigabit Ethernet Ports
: Traffic on Gigabit Ethernet ports is
disrupted during a downgrade.
This includes IPS modules and the Gigabit Ethernet ports on the MSM-18/4 module, and the
MDS 9222i switch. Those nodes that are members of VSANs traversing an FCIP ISL are
impacted, and a fabric reconfiguration occurs. iSCSI initiators connected to the Gigabit
Ethernet ports lose connectivity to iSCSI targets while the downgrade is in progress.
–
FICON
: If you have FICON enabled, the downgrade path is different. See the
“FICON
Downgrade Paths” section on page 20
.
Use
Table 13
to determine the nondisruptive downgrade path from Cisco NX-OS Release 5.2(1). Find
the NX-OS or SAN-OS image you want to downgrade to in the To SAN-OS Release column of the table
and use the path recommended.
Note
The software downgrade information in
Table 13
applies only to Fibre Channel switching traffic.
Downgrading system software disrupts IP and intelligent services traffic.
