HP 316095-B21 - StorageWorks Edge Switch 2/24 Release Note - Page 22

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ISL disconnect causes NOS error with the OpenVMS operating systems

When an ISL connection is physically removed between directors or switches, the

Fibre Channel Adapter model FCA2354 transmits a Not Operational Sequence

(NOS) error. This is observed as an entry in the HAFM appliance Link Incident

log for the port in which the FCA2354 is attached. The director's Hardware View

also displays a yellow triangle icon over the port that detected this incident. The

fabric operation or data movement is not disrupted by these incidents, and you can

clear alerts from these incidences using the following procedure.

Workaround

Use these steps to clear the incident alerts.

1. At the HAFM Hardware View, click the port module to open the Port Card

2. Right-click on the port with the yellow triangle icon, and choose Clear Link

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 has 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.

View.

Incident Alert(s).

HP StorageWorks Edge Switch release notes