FW 07.01.02/HAFM SW 08.06.00 HP StorageWorks HA-Fabric Manager Release Notes (AA-RUR6G-TE, August 2005)

Advanced Fabri
cDiagnostics
This provides t
ools to monitor the fabric and identify potential problems before
they impact network and application performance. Tools include ISL Fencing, new
switch-centric Fabric and Embedded Por t Logs, an Audit Log for the embedded user
interfaces, and access to the Digital Diagnostic capabilities included with newer SFP
transceivers.
ISL fencing
Also called Port Fencing, this feature allows customers to set up policies for blocking
an ISL when problems occur that cause an ISL to “bounce” or repeatedly at tempt to
establish a connection. Any time an ISL is brought up or down, a fabric rebuild occurs,
which can cause disruption in some environments. ISL Fencing will lessen the likelihood
of having a problematic ISL connection disrupt a SAN.
To configure this feature, users set policies with thresholds based on the number of
port events occurring during a set time period. If a port generates enou gh events to
exceed the policy threshold, the port is automatically blocked and the user is noti fied.
Transmit and receive traffic is disabled until the user can inv estigate, solve the problem,
and manually unblock the port.
Embedded Audit Log
The Audi
t log is a new log available through CLI and EWS. This is not the same Audit
Log ava
ilable through HAFM. The log records all configuration changes to the switch to
provi
de data for analyzing problems caused by configuration changes.
Embedded Port Log
The Embed ded Port Log is a new log that records all Fibre Channel trafficfromorto
the embedded por t. This log is actually implemented as two logs, one that a llows entry
wrapping and one that stops adding entries when filled. The logs allow filtering based
on Class F frames, as well as by port number, to isolate specificeventsorproblems.
This feature is intended for advanced users to diagnose and troubleshoot trafficproblems
withinaSAN.TheEmbeddedPortLogisavailableviaEWS,CLI,andHAFM.
Embedded Fabric Log
The switch-based fabric log records events related to the following services:
• Fabric Controller
• Pat
h Selection
• Login Server
• Name Server
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