HP Cisco MDS 9120 Cisco MDS 9000 Family Fabric Manager Configuration Guide - R - Page 426

Fibre Channel Interfaces Chapter 20 Configuring Interfaces Send documentation comments to [email protected] Configuring Port Guard Using the port guard feature, you can restrict the number of error reports and bring a malfunctioning port to down state dynamically. The link failure can be caused by the following reasons: • General link failure. • Link failure due to loss of signal (LOS) or not operational (NOS). • High bit error rate. • Too many interrupts. • Cable is disconnected. • BB_credit buffers overflow. • Hardware recoverable errors. • The connected device rebooted (F ports only). • The connected linecard rebooted (ISL only). Note Even if the link does not flap due to failure of the link, and port guard is not enabled, the port goes into a down state if too many invalid FLOGI requests are received from the same host. To enable port guard using the Fabric Manager, follow these steps: Step 1 Step 2 Expand Switches > Interfaces, and then select FC Physical. You see the interface configuration in the Information pane. Click the Port Guard tab and then select the port (see Figure 20-6). Figure 20-6 Fabric Manager - Port Guard Tab Step 3 Step 4 Check the check box in the Enable column. (Optional) Enter the Duration in seconds and NumFlaps. If the values are 0, the port is brought to down state if the link flaps even once. Otherwise, the link is brought to down state if the link flaps for the NumFlaps times within the Duration (in seconds). 20-16 Cisco MDS 9000 Family Fabric Manager Configuration Guide OL-17256-03, Cisco MDS NX-OS Release 4.x