Cisco MDS-9124 Troubleshooting Guide - Page 312

Merge Failure Issues Chapter 15 Troubleshooting Distributed Device Alias Services Send documentation comments to [email protected] Because the application is busy, it cannot validate the device alias database, and it returns a busy response to the device alias process. This information is propagated back to CFS. CFS then waits for the length of the defined retry time, and then automatically retries the device alias merge. During the defined retry time, the device alias merge status is shown as in progress. (See Example 15-8). Example 15-8 Displaying Merge Status switch-1# show cfs merge status na device-alias Physical-fc Merge Status: In Progress ===> Status shows merge is still in progress If the application lock is released within the defined CFS retry time, the device alias validation can be processed. Otherwise, the application returns a busy response to the process again, and CFS again waits for the length of the defined retry time before retrying the device alias validation again. This situation is repeated until the application lock is released. This is not an uncommon situation. When the ISL comes up between two fabrics, it typically triggers a CFS merge of multiple applications. By the time the device alias merge moves to validation stage, other applications may be busy handling their own merge. This is a transient state, and the device alias merge would be backed off and retired after the defined retry time. If, for any reason, the application database remains locked, the device alias merge remains in progress and cannot complete. To verify a locked application database and to determine how to proceed, follow these steps: Step 1 Step 2 Use the show cfs merge status na device-alias command to see the merge status. switch-1# show cfs merge status na device-alias Physical-fc Merge Status: In Progress ===>The merge status shows in progress Local Fabric Switch WWN IP Address 20:00:00:0d:ec:2f:c1:40 172.20.150.38 [Merge Master] switch-1 Total number of switches = 1 Remote Fabric Switch WWN IP Address 20:00:00:0d:ec:04:99:40 172.20.150.30 [Merge Master] Total number of switches = 1 Obtain more information about the progress of the merge by using the show device-alias internal validation-info command. In the following example, SAP 110 (IVR) on SWWN 20:00:00:0d:ec:04:99:40 (switch-2) has rejected the validation. The explanation indicates that the IVR application has rejected the validation because it is busy. switch-1# show device-alias internal validation-info Validation timer: 0s Per SAP Info Table SAPS: 0 MTS Buffer Array Details: 15-10 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x OL-9285-05