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11-1
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
11
Troubleshooting VSANs, Domains, and FSPF
This chapter describes how to identify and resolve problems that might occur when implementing
VSANs, domains, and FSPF. This chapter includes the following sections:
• Overview, page 11-1
• Initial Troubleshooting Checklist, page 11-1
• VSAN Issues, page 11-3
• Dynamic Port VSAN Membership Issues, page 11-9
• Domain Issues, page 11-17
• FSPF Issues, page 11-24
Overview
Virtual SANs (VSANs) provide a method of isolating devices that are physically connected to the same
storage network, but are logically considered to be part of different SAN fabrics that do not need to be
aware of one another. Each VSAN can contain up to 239 switches and has an independent address space
that allows identical Fibre Channel IDs (FC IDs) to be used simultaneously in different VSANs.
VSANs provide the following capabilities:
• Isolate devices physically connected to the same fabric.
• Reduce the size of a Fibre Channel distributed database.
• Enable more scalable and secure fabrics.
Initial Troubleshooting Checklist
Most VSAN problems can be avoided by following the best practices for VSAN implementation.
However, if needed, you can use the Fabric Analysis tool in Fabric Manager to verify different categories
of problems such as VSANs, zoning, FCdomain, admin issues, or switch-specific or fabric-specific
issues.
Fabric Manager provides the configuration consistency check tool. Refer to the Cisco MDS 9000 Fabric
Manager Configuration Guide for more information about this tool.
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