Isl Disconnect Causes Nos Error With The Openvms Operating Systems; Support For Speed Auto-Negotiate - HP 316095-B21 - StorageWorks Edge Switch 2/24 Release Note

Known Issues

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 server 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, which can be
cleared 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 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.
20
View.
Incident Alert(s).
Edge Switch Release Notes