Cisco MDS-9124 Troubleshooting Guide - Page 255

Send documentation comments to [email protected] 12 C H A P T E R Troubleshooting SAN Device Virtualization This chapter describes how to troubleshoot and resolve SAN device virtualization (SDV) configuration issues in the Cisco MDS 9000 Family of multilayer directors and fabric switches. It includes the following sections: • Overview, page 12-1 • Initial Troubleshooting Checklist, page 12-1 • SDV Issues, page 12-3 Overview With Cisco SDV, you can create virtual devices that represent physical end-devices. The SAN devices that are virtualized can be either initiators or targets. Virtualization of SAN devices accelerates swapout or failover to a replacement disk array, and it also minimizes downtime when replacing host bus adapters (HBAs) or when re-hosting an application on a different server. Troubleshooting SDV involves checking the configuration of virtual devices, domain IDs, and zone sets. Configuration problems with SDV can prevent devices from communicating properly. Note SDV is a distributed service and uses CFS (Cisco Fabric Services) distribution to synchronize the databases. Initial Troubleshooting Checklist Begin troubleshooting SDV issues by checking the following issues: Checklist Verify licensing requirements. See Cisco MDS 9000 Family Fabric Manager Configuration Guide. Enable SDV on all the relevant switches. Configure the virtual devices (with or without a persistent FC ID) in a VSAN. Link the virtual device with the primary real device. Commit the configuration in the VSAN and check the commit status. Ensure that the SDV database is consistent on all switches. Check off OL-9285-05 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x 12-1