gasrasounds.blogg.se - Brocade san switch domain id

Switch(config)# fcdomain optimize fast-restartĮnables domain manager fast restart on VSAN 3.Įnables domain manager fast restart on the range of VSANs from VSAN 7 to VSAN 10.ĭisables (default) domain manager fast restart on VSAN 8.īy default, the configured priority is 128. The fast restart feature can be used in any interoperability mode. When a backup link is not available, the domain manager reverts to the default behavior and starts a BF phase, followed by a principal switch selection phase. Also, the reconfiguration required to select the new principal link only affects the two switches that are directly attached to the failed link, not the entire VSAN. When fast restart is enabled and a backup link is available, the domain manager needs only a few milliseconds to select a new principal link to replace the one that failed. Both of these phases involve all the switches in the VSAN and together take at least 15 seconds to complete.To reduce the time required for the domain manager to select a new principal link, you can enable the domain manager fast restart feature. By default, the domain manager starts a build fabric (BF) phase, followed by a principal switch selection phase. Switch(config)# fcdomain restart disruptiveįorces the VSAN to reconfigure with data traffic disruption.Īs of Cisco MDS SAN-OS Release 3.0(2), when a principal link fails, the domain manager must select a new principal link. Non-disruptive domain restarts are acceptable only when changing a preferred domain ID into a static one (and the actual domain ID remains the same).įorces the VSAN to reconfigure without traffic disruption. A disruptive restart is required to apply most configuration changes-including manually assigned domain IDs. If you are attempting to resolve a domain ID conflict, you must manually assign domain IDs. If you perform a nondisruptive restart, build fabric (BF) frames are sent to other switches in the fabric and data traffic is disrupted only on the switch. If you perform a disruptive restart, reconfigure fabric (RCF) frames are sent to other switches in the fabric and data traffic is disrupted on all the switches in the VSAN (including remotely segmented ISLs). This section describes the fcdomain feature and includes the following topics:įibre Channel domains can be started disruptively or nondisruptively. Be sure to use IDs and values that apply to your configuration. Note Domain IDs and VSAN values used in all procedures are only provided as examples.

Fabric reconfiguration-This phase guarantees a resynchronization of all switches in the fabric to ensure they simultaneously restart a new principal switch selection phase.įigure 17-1 Sample fcdomain Configuration.

FC ID allocation-This phase guarantees a unique FC ID assignment to each device attached to the corresponding switch in the fabric.

Domain ID distribution-This phase guarantees each switch in the fabric obtains a unique domain ID.

Principal switch selection-This phase guarantees the selection of a unique principal switch across the fabric.

This section describes each fcdomain phase: This chapter includes the following sections: If you do not save the configuration, the previously saved startup configuration is used. The next time you reboot the switch, the saved configuration is used. Tip When you change the configuration, be sure to save the running configuration. If you do not configure a domain ID, the local switch uses a random ID. The domains are configured on a per VSAN basis. The Fibre Channel domain (fcdomain) feature performs principal switch selection, domain ID distribution, FC ID allocation, and fabric reconfiguration functions as described in the FC-SW-2 standards. Specifying Static or Preferred Domain IDsĪbout CFS Distribution of Allowed Domain ID ListsĮnabling Contiguous Domain ID AssignmentsĬonfiguring Unique Area FC IDs for an HBA