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Virtual Connect SAN Cookbook.pdf - Sallustio.ch

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Login Redistribution<br />

If a failed port becomes available again, the logins redistribution (or logins failback) is not automatic<br />

except if the Automatic Login Redistribution available with the VC FlexFabric modules is used.<br />

Server 1<br />

Server 2<br />

Server 3<br />

Server 4<br />

HBA1 HBA2 HBA1 HBA2 HBA1 HBA2<br />

HBA1<br />

HBA2<br />

VC Domain<br />

VC <strong>SAN</strong> 1<br />

VC-FC Module<br />

Server 3<br />

Server 2<br />

Server 1<br />

Server 4<br />

Fabric 1<br />

There are two Login redistribution modes:<br />

<br />

<br />

Manual Login Re-Distribution: When configured, a user is expected to initiate a Login Re-<br />

Distribution request via VC GUI or CLI interfaces.<br />

Automatic Login Re-Distribution: When configured, the VC FlexFabric module initiates Login Re-<br />

Distribution automatically when the time interval specified expires.<br />

Table 1: Manual and Automatic Logins Redistribution support<br />

Login Re-Distribution<br />

Mode<br />

Auto-failover*<br />

Auto-failback**<br />

VC-FC<br />

support<br />

MANUAL YES NO YES<br />

AUTOMATIC<br />

YES<br />

YES after link<br />

stability delay<br />

NO<br />

FlexFabric<br />

support<br />

YES<br />

(default)<br />

YES<br />

*: when a port in the <strong>SAN</strong> Fabric group becomes unavailable<br />

**: when a failed port returns to a good working condition<br />

Considerations and concepts 22

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