Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic
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Timeout values<br />
The switch timeout values determine the timeout values for all ports on the switch.<br />
Table 11 describes the switch timeout parameters. The timeout values must be the<br />
same for all switches in the fabric.<br />
Notes:<br />
Mismatched timeout values will disrupt the fabric. These values should not be<br />
changed unless absolutely necessary. Therefore, the switch must be offline to change<br />
these values. Use the <strong>Switch</strong> Properties dialog to take the switch offline.<br />
Table 1<strong>1.</strong> Timeout values<br />
Parameter<br />
R_A_TOV<br />
E_D_TOV<br />
Description<br />
Resource Allocation Timeout—represents the maximum time a frame<br />
could be delayed in the Fabric and still be delivered. The default is<br />
10000 milliseconds.<br />
Error Detect Timeout—represents the maximum round trip time that<br />
an operation between two N_Ports could require. The default is 2000<br />
milliseconds.<br />
Transparent mode<br />
The Transparent Mode option enables you to toggle between transparent mode and<br />
full-fabric Fibre Channel mode. If the Transparent mode option is selected in the<br />
Advanced <strong>Switch</strong> Properties dialog, the switch converts to a pass-thru module and<br />
operates in transparent mode. If the Transparent mode option is not selected, the<br />
switch remains in full-fabric mode and can be managed along with other switches<br />
in the fabric.<br />
<strong>Chapter</strong> 4. Managing switches 59