Cisco MDS-9124 Troubleshooting Guide - Page 240

Domain Issues Chapter 11 Troubleshooting VSANs, Domains, and FSPF Send documentation comments to [email protected] Step 2 Use the show fcdomain domain-list vsan vsan-id command to view which domains are currently in your fabric. switch1# show fcdomain domain-list vsan 2 Number of domains: 2 Domain ID WWN 0x4a(74) 20:01:00:05:30:00:13:9f [Local] 0x4b(75) 20:01:00:05:30:00:13:9e [Principal] Step 3 Step 4 Step 5 Repeat Step 2 on the other switch to determine which domain IDs overlap. switch2# show fcdomain domain-list vsan 2 Number of domains: 1 Domain ID WWN 0x4b(75) 20:01:00:05:30:00:13:9e [Local][Principal] In this example, switch 2 is isolated because of a domain ID 75 overlap. Use the fcdomain domain domain-id [static | preferred] vsan vsan-id command to change the domain ID for one of the overlapping domain IDs. • The static option tells the switch to request that particular domain ID. If it does not get that particular address, it will isolate itself from the fabric. • The preferred option has the switch request a specified domain ID. If that ID is unavailable, it will accept another ID. Use the fcdomain restart disruptive vsan command to restart the Domain Manager. Note While the static option can be applied to runtime after a disruptive or nondisruptive restart, the preferred option is applied to runtime only after a disruptive restart. Using Fabric Reconfiguration for Domain ID Assignments You can use a fabric reconfiguration to reassign domain IDs and resolve any overlapping domain IDs. If you enable the auto-reconfigure option on both switches before connecting the fabric, a disruptive reconfiguration (RCF) occurs. The RCF functionality would automatically force a new principal switch selection and cause new domain IDs to be assigned to the different switches. Caution A disruptive reconfiguration might affect data traffic. 11-20 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x OL-9285-05