Cisco N5K-C5010P-BF Troubleshooting Guide - Page 73
Troubleshooting SAN Switching Issues, Overview
UPC - 882658212208
View all Cisco N5K-C5010P-BF manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 73 highlights
Send document comments to [email protected]. 5 C H A P T E R Troubleshooting SAN Switching Issues A storage area network (SAN) is a network of storage devices that provide data storage for servers. This chapter describes how to identify and resolve problems that can occur with a SAN and the Cisco Nexus 5000 Series switch. This chapter includes the following sections: • Overview • NPV • Zoning • SAN Port Channels • FC Services • Cisco Fabric Services • VSANs • Registers and Counters Overview The two most common symptoms of problems in a storage network are: • A host cannot access its allocated storage. • An application does not respond after attempting to access the allocated storage. By answering the questions in this section, you can determine the paths you need to follow and the components that you should investigate further. These questions are independent of host, switch, or subsystem vendor. Consider the following questions to determine the status of your installation: • Is this a newly installed system or an existing installation? (It could be a new SAN, host, or subsystem, or new LUNs exported to an existing host.) • Has the host ever been able to see its storage? • Does the host recognize any LUNs in the subsystem? • Are you trying to solve an existing application problem (too slow, too high latency, excessively long response time) or did the problem show up recently? • What changed in the configuration or in the overall infrastructure immediately before the applications started to have problems? OL-25300-01 Cisco Nexus 5000 Series Troubleshooting Guide 5-1