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Chapter 19
Configuring and Managing Zones
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 .
About Read-Only Zones
By default, an initiator has both read and write access to the target's media when they are members of
the same Fibre Channel zone. The read-only zone feature allows members to have only read access to
the media within a read-only Fibre Channel zone.
You can also configure LUN zones as read-only zones.
Read-Only Zone Configuration Guidelines
Any zone can be identified as a read-only zone. By default all zones have read-write permission unless
explicitly configured as a read-only zone.
Follow these guidelines when configuring read-only zones:
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Configuring Read-Only Zones
To configure read-only zones, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# zone name Sample2 vsan 2
switch(config-zone)#
Step 3
switch123(config-zone)# attribute
read-only
switch123(config-zone)# no attribute
read-only
To configure the read-only option for a default zone, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# zone default-zone vsan 1
switch(config-default-zone)#
OL-6973-03, Cisco MDS SAN-OS Release 2.x
If read-only zones are implemented, the switch prevents write access to user data within the zone.
If two members belong to a read-only zone and to a read-write zone, read-only zone has priority and
write access is denied.
LUN zoning can only be implemented in Cisco MDS 9000 Family switches. If LUN zoning is
implemented in a switch, you cannot configure interop mode in that switch.
Read-only volumes are not supported by some operating system and file system combinations (for
example, Windows NT or Windows 2000 and NTFS file system). Volumes within read-only zones
are not available to such hosts. However, if these hosts are already booted when the read-only zones
are activated, then read-only volumes are available to those hosts.
The read-only zone feature behaves as designed if FAT16 or FAT32 file system is used with the
previously-mentioned Windows operating systems.
Purpose
Enters configuration mode.
Configures a zone called Sample2 for the specified
VSAN (vsan 2).
Sets read-only attributes for the Sample2 zone.
The default is read-write for all zones.
Note
Reverts the Sample2 zone attributes to read-write.
Purpose
Enters configuration mode.
Enters the default-zone submode.
Cisco MDS 9000 Family Configuration Guide
About Read-Only Zones
19-19
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