Brocade Troubleshooting and Diagnostics Guide v6.1.0 (53-1000853-01, June 2008)

32 Fabric OS Troubleshooting and Diagnostics Guide

53-1000853-01

Segmented fabrics

See the Fabric OS Command Reference for more detailed information.

9. Enable the switch by entering the switchEnable command.

Alternatively, you can reconcile fabric parameters by entering the configUpload command for each

switch.

Downloading a correct configuration

You can restore a segmented fabric by downloading a previously saved correct backup

configuration to the switch. Downloading in this manner reconciles any discrepancy in the fabric

parameters and allows the segmented switch to rejoin the main fabric. For details on uploading

and downloading configurations, see Fabric OS Administrator’s Guide.

Reconciling a domain ID conflict

If a domain ID conflict appears, the conflict is only reported at the point where the two fabrics are

physically connected. However, there may be several conflicting domain IDs, which appears as

soon as the initial conflict is resolved.

Typically, the fabric automatically resolves domain conflicts during fabric merges or builds unless

Insistent Domain ID (IDID) is configured. If IDID is enabled, switches that cannot be programmed

with a unique domain ID are segmented out. Check each switch that has IDID configured and make

sure their domain IDs are unique within the configuration.

Repeat the following procedure until all domain ID conflicts are resolved.

1. Enter the fabricShow command on a switch from one of the fabrics.

2. In a separate Telnet window, enter the fabricShow command on a switch from the second

fabric.

3. Compare the fabricShow output from the two fabrics. Note the number of domain ID conflicts;

there may be several duplicate domain IDs that must be changed. Determine which switches

have domain overlap and change the domain IDs for each of those switches.

4. Choose the fabric on which to change the duplicate domain ID; connect to the conflicting

switch in that fabric.

5. Enter the switchDisable command.

6. Enter the switchEnable command.

This will enable the joining switch to obtain a new domain ID as part of the process of coming

online. The fabric principal switch will allocate the next available domain ID to the new switch

during this process.

7. Repeat step 4 through step 6 if additional switches have conflicting domain IDs.