HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.X Procedures User Guide (AA-R - Page 169
Initializing trunking on ports, Monitoring traffic, Disabling and reenabling the switch
View all HP StorageWorks 2/64 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 169 highlights
• Consider how the addition of a new path affects existing traffic patterns: • A trunking group has the same link cost as the master ISL of the group, regardless of the number of ISLs in the group. This allows slave ISLs to be added or removed without causing data to be rerouted, because the link cost remains constant. • The addition of a path that is shorter than existing paths causes traffic to be rerouted through that path. • The addition of a path that is longer than existing paths might not be useful because the traffic chooses the shorter paths first. • Plan for future bandwidth addition to accommodate increased traffic. For trunking groups over which traffic is likely to increase as business requirements grow, consider leaving one or two ports in the group available for future non-destructive addition of bandwidth. • 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. Disabling and reenabling the switch 1. Connect to the switch and log in as admin. 2. Issue the switchDisable command. 3. Issue the switchEnable command. Disabling and reenabling ports 1. Connect to the switch and log in as admin. 2. Issue the portDisable command. The format is: portDisable [slot/]port where 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 where slot is the slot number (Core Switch 2/64, SAN Director 2/128, and 4/256 SAN Director 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: • 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 199. Fabric OS 5.x administrator guide 169