HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class - Manual (Page 115)

Fabric OS 5.0.0 procedures user guide 115
• Consider creating redundant trunking groups where additional ports are available or paths are
particularly critical.
This helps to protect against oversubscription of trunking groups, multiple ISL failures in the same
group, and the rare occurrence of an ASIC failure.
• To provide the highest level of reliability, deploy trunking groups in redundant fabrics to further ensure
ISL failures do not disrupt business operations.
Initializing trunking on ports
After you unlock the ISL Trunking license, you must reinitialize the ports being used for ISLs so that they
recognize that trunking is enabled. This procedure needs to be performed only once.
To reinitialize the ports, you can either disable and then reenable the switch, or disable and then
reenable the affected ports.
To disable and reenable the switch:
1. Connect to the switch and log in as admin.
2. Issue the
switchdisable
command.
3. Issue the
switchenable
command.
To disable and reenable ports:
1. Connect to the switch and log in as admin.
2. Issue the
portdisable
command. The format is:
portdisable [slot/]port
Slot
is the slot number (Core Switch 2/64 and SAN Director 2/128 only) and port is the port
number of the port you want to disable.
3. Issue the
portenable
command.The format is:
portenable [slot/]port
Slot
is the slot number (Core Switch 2/64 and SAN Director 2/128 only) and port is the port
number of the port you want to enable.
Monitoring traffic
To implement ISL Trunking effectively, you must monitor fabric traffic to identify congested paths or to
identify frequently dropped links. While monitoring changes in traffic patterns, you can adjust the fabric
design accordingly, such as by adding, removing, or reconfiguring ISLs and trunking groups in
problem areas.
There are three methods of monitoring fabric traffic:
• HP Advanced Performance Monitoring monitors traffic flow and allows you to view the impact of
different fabric configurations on performance. See ” Administering advanced performance
monitoring ” on page 143 for additional information.
• HP Fabric Watch allows you to monitor traffic flow through specified ports on the switch and send
alerts when the traffic exceeds or drops below configurable thresholds. Refer to the HP StorageWorks
Fabric OS 4.x Fabric Watch user guide for additional information.