HP Storage Essentials V5.00.01 user guide (T4283-96012, January 2006)

Storage Essentials 5.00.01 User Guide 619
IMPORTANT: One way to determine what is happening is to look at the log messages during
discovery and getting element details. See ”Viewing Log Messages” on page 52 for more
information.
No Stitching for Brocade Switches with Firmware 3.2.0
Stitching does not appear for hosts attached to Brocade switches running firmware 3.2.0. There is
no stitching when the PID format is 0. The port setting must be the same for all Brocade switches in
the fabric or the fabric will become segmented. The PID format should be set to 1 for all Brocade
switches running firmware later than 2.6.0 and 3.0. The PID=0 setting is a legacy Port ID format that
does not support the numbers of ports beyond 16.
Link Between a Brocade Switch and a Host
Disappears from the Topology
If a link that used to work between a Brocade switch and a host disappears from the topology, you
may need to rediscover the Brocade switch and the host. Also, confirm that both are online and
there are no network connection issues. As a last resort, you may need to reboot the switch. In some
instances, the API of the Brocade switch has been known to hang. Rebooting the switch clears the
switch of the API hang.
Incorrect Topology Sometimes Displayed for CNT Switches
The CNT SMI-S provider for CNT switches does not return the correct topology information when
more than one fabric is managed by the same InVSN™ Storage Network Manager. McDATA,
which completed its acquisition of CNT in the summer of 2005, has been made aware of this issue.
Unable to Find Elements on the Network
NOTE: This section only applies to Discovery from SE.
The management server uses ping to find the devices on the network enabled for IP. Ping is a
program that lets you verify that a particular IP address exists. Ping is not guaranteed to return a
response from all devices. If Discovery is not able to find a device automatically, enter the IP address
for the device on the Discovery Targets tab, which can be accessed by clicking the Discovery button
at the top of the screen in the management server. Sometimes ping cannot find the device if one of
the following conditions occur:
• Network configuration does not support ping, including data center security (firewalls).
• Device has the ping responder turned off.
• Device does not support ping.
Unable to See Path Information
You will not be able to see path information if LUN masking information is missing. To view LUN
masking information, follow the steps described in the section, ”Accessing Information About Host
Security Groups” on page 333.