CHAPTER
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3-1
Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
3
Troubleshooting Switch Level Issues and
Interswitch Connectivity
This chapter describes how to identify and resolve problems that affect basic connectivity between
switches, hosts, and storage in the network fabric.
The most common problems a system administrator can face may be categorized by two different
scenarios:
• Switch-to-switch basic interconnectivity problems, which can result in the isolation of a port or
VSAN due to incorrect parameters or settings on an ISL or VSAN
• Fabric to Server/Storage connectivity problems: identified by a Fx port not coming up or caused by
zone or VSAN configuration errors
This section will present some of the most common scenarios, in which either switch-to-switch basic
connectivity problems or fabric to end-devices problems can be found.
These scenario are grouped in three different sections:
• Troubleshooting E Port Connectivity - ISL Isolation, page 3-1
• Troubleshooting TE Port Connectivity - VSAN Isolation, page 3-10
• Troubleshooting Fx Port Connectivity, page 3-13
• Troubleshooting Hardware Problems, page 3-25
•
Troubleshooting E Port Connectivity - ISL Isolation
This section describes how to troubleshoot Inter-Switch Link (ISL) isolation, which may occur when you
try to merge two separate fabrics or add a new domain to an existing fabric. It includes the following
topics:
• Overview, page 3-2
• Troubleshoot Switch and Port Parameters, page 3-3
• Troubleshooting a ZONE Merge Failures, page 3-5
• Troubleshooting a VSAN Configuration Conflict, page 3-6
• Troubleshooting a Domain ID Conflict, page 3-7
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