HP StorageWorks 2/140 - Director Switch Release Note - Page 22

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HP StorageWorks 2/140 - Director Switch Release Note

Known Issues

Support for Speed Auto-Negotiate

Auto-negotiate is supported. However, HP recommends that the port speed for

E_Ports (for Interswitch Links, or ISLs) be set to a specific port speed (1Gb/sec or

2Gb/sec, as appropriate for the speed of the directors or edge switches being

connected) instead of to Negotiate. Using a specific port speed decreases the time

for a fabric build in response to some perturbation event in the fabric. Similarly,

setting a specific port speed for N_Ports also decreases fabric build time.

However, setting a specific port speed for N_Ports is not required.

There are a few older HBA devices that do not always succeed in logging in to a

switch port when the port speed is set for auto-negotiate.

Workaround

If an older HBA is found to have difficulty logging into a switch port that has its

port speed configured as Negotiate, configure that port speed to 1Gb/sec or

2Gb/sec according to the operation speed of the HBA connected to that port.

Ports May Accumulate Spurious Events

A port may accumulate Invalid transmission word and Bit-Error Threshold Link

Incident events when a transceiver is poorly seated resulting in a poor ground

connection.

Workaround

Reseating the optical transceiver will correct the problem.

IML is Required After Performing a Configuration Reset

If a Reset Configuration is performed on a Director 2/140 to reset the director to

factory configuration, an initial machine load (IML) is required to be performed to

complete the process. This is done by pressing the white button on the front of

either CTP card for more than three seconds. This can also be accomplished by

turning the power to the Director 2/140 off and then back on.

Director Release Notes