HP Cisco Nexus 5000 Cisco MDS 9000 Family CLI Configuration Guide - Release 4. - Page 485

Chapter 18 Configuring Domain Parameters Fibre Channel Domains Send documentation comments to [email protected] About Switch Priority By default, the configured priority is 128. The valid range to set the priority is between 1 and 254. Priority 1 has the highest priority. Value 255 is accepted from other switches, but cannot be locally configured. Any new switch can become the principal switch when it joins a stable fabric. During the principal switch selection phase, the switch with the highest priority becomes the principal switch. If two switches have the same configured priority, the switch with the lower WWN becomes the principal switch. The priority configuration is applied to runtime when the fcdomain is restarted (see the "About Domain Restart" section on page 18-3). This configuration is applicable to both disruptive and nondisruptive restarts. Configuring Switch Priority To configure the priority for the principal switch, follow these steps: Step 1 Step 2 Command Purpose switch# config t switch(config)# Enters configuration mode. switch(config)# fcdomain priority 25 VSAN 99 Configures a priority of 25 for the local switch in VSAN 99. switch(config)# no fcdomain priority 25 VSAN 99 Reverts the priority to the factory default (128) in VSAN 99. About fcdomain Initiation By default, the fcdomain feature is enabled on each switch. If you disable the fcdomain feature in a switch, that switch can no longer participate with other switches in the fabric. The fcdomain configuration is applied to runtime through a disruptive restart. Disabling or Reenabling fcdomains To disable or reenable fcdomains in a single VSAN or a range of VSANs, follow these steps: Step 1 Step 2 Command switch# config t switch(config)# switch(config)# no fcdomain vsan 7-200 switch(config)# fcdomain vsan 2008 Purpose Enters configuration mode. Disables the fcdomain configuration in VSAN 7 through 200. Enables the fcdomain configuration in VSAN 2008. OL-18084-01, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family CLI Configuration Guide 18-5