Activating Default Zones; To Activate A Default Zone; To View The Current Default Zone Access Mode; Merging Zones - HP AE370A - Brocade 4Gb SAN Switch 4/12 Administrator's Manual

Activating default zones

Typically, when you issue the cfgDisable command in a large fabric with thousands of devices, the
name server indicates to all hosts that they can communicate with each other. In fact, each host can receive
an enormous list of PIDs, and ultimately cause other hosts to run out of memory or crash. To ensure that all
devices in a fabric do not see each other during a cfgDisable operation, you can activate a default
zone.
A default zone includes all devices in a fabric that are not members of an active zone set. Depending upon
the configuration, default zones are activated whenever you enter the cfgDisable command. Default
zones have the following properties:
• Any Nx_Port that is not a member of any zone in the active zone set is a member of the default zone.
• The fabric does not permit members of the default zone to interact with members of any other zone.
• The fabric may not allow members of the default zone to interact with other members of the default
zone.
When you activate default Zoning a new zone alias is created in the defined zone configuration and is
propagated to the fabric. Then, when you issue the cfgDisable command, if the zone alias exists,
Zoning actually interprets the cfgDisable command as a cfgEnable command for the default zone.
The default zone applies to the entire fabric (regardless of switch model).

To activate a default zone:

1. Connect to the switch and log in as admin.
2. Enter the cfgActvShow command to view the current zone configuration.
3. If no zone configuration transactions are in progress, then enter the defZone -noaccess command,
which prevents all Nx_Ports from communicating with each other.
4. Enter either the cfgSave, cfgEnable, or cfgDisable command to commit the change and
distribute it to the fabric. The change will not be committed and distributed across the fabric if you do
not enter one of these commands.
After setting the default zone access mode to noaccess, subsequent use of the cfgDisable command
performs the equivalent of the cfgEnable "d_efault_Cfg" command.

To view the current default zone access mode:

1. Connect to the switch and log in as admin.
2. Enter the defZone -show command.
NOTE: If you performed a firmware download of an older release, then the current default zone access
state will appear as it did prior to the download. For example, if the d_efault_Cfg was in effect before
the download, it will remain in effect afterward.
Refer to the Fabric OS Command Reference Manual for additional information about the defZone
command and all of its options.

Merging zones

Table 83 presents Zoning database size limitations for various Fabric OS release versions. The maximum
size of a zone database is the upper limit for the defined configuration, and it is determined by the amount
of flash memory available for storing the defined configuration.
Table 83 Zoning database limitations
Fabric OS version
2.4.0
2.5.0
2.6.0
Maximum database size (KB))
64
64
96
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