Loop Protection In Port Mode; Loop Protection In Vlan Mode; Changing Modes - HP 3500 Series Advanced Traffic Management Manual

Configure the VLANs on which loop-protect is enabled.
Maximum number of loop-protected VLANS is 32.

Loop Protection in Port Mode

To enable loop protection in port mode, follow these steps.
1. Configure port mode with this command:
HP Switch(config)# loop-protect mode port
Enter the loop-protect command and specify the port(s) on which loop
2.
protection should be enabled. For example:
HP Switch(config)# loop-protect 1-2
You can optionally specify a receiver-action of send-disable to shut down
3.
the port in the event of a loop. For example:
HP Switch(config)# loop-protect 1-2 receiver-action
send-disable

Loop Protection in VLAN Mode

You can only configure VLANs for loop protection when operating in VLAN
mode. When loop-protect is enabled for a VLAN and a loop-protect enabled
interface is a member of that VLAN, loop protect packets are sent on that VLAN
to detect loops.
To enable loop protection in VLAN mode, follow these steps.
1. Configure VLAN mode with this command:
HP Switch(config)# loop-protect mode vlan
Enter the loop-protect command and specify the VLANs on which loop
2.
protection should be enabled. For example:
HP Switch(config)# loop-protect vlan 20,30

Changing Modes

When changing from VLAN mode to port mode, you are prompted with a
message, as shown in Figure 3-35. The VLANs will no longer be configured for
loop-protection.
Multiple Instance Spanning-Tree Operation
Loop Protection
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