Configuring Loop Protection on AOS-S Ports

Loop protection provides protection against loops by transmitting loop protocol packets out of ports. For switches provisioned in UI groups, administrators can enable or disable loop protection on the switch ports or trunks. Loop protection is always disabled by default on AOS-S switches. For switch console access, non-administrators can configure a timer to auto-recover ports if the switch detects any loop.

To configure loop protection, complete the following steps:

1. In the WebUI, select one of the following options:
   • To select a switch group in the filter:
     1. Set the filter to a group containing at least one switch.
        

        The dashboard context for the group is displayed.

     2. Under Manage, click Devices > Switches.
     3. Click the AOS-S or Config icon to view the switch configuration dashboard.
   • To select a switch in the filter:
     1. Set the filter to Global or a group containing at least one switch.
     2. Under Manage, click Devices > Switches.
        

        A list of switches is displayed in the List view.

     3. Click a switch under Device Name.
        

        The dashboard context for the switch is displayed.

     4. Under Manage, click Device.
        

        The tabs to configure the switch is displayed.

2. Click Interface > Loop Protection. The Loop Protection page is displayed.
3. Depending on whether you want to configure a port or trunk, complete one of the following steps:
   • In the Port Settings tab, select the port(s), and click Edit.
   • In the Trunk Group Settings tab, select the trunk(s), and click Edit.

   Table 1: Viewing or Configuring Port Settings

   Name	Description	Value
   Port	The number assigned to the switch port.	0 – 65535
   Loop Protection	Enables or disables loop protection.	Enable or Disable Default: Disable
   Trunk Group	Name of the trunk group to which the port belongs.	Dependent on the switch type.

   Table 2: Viewing or Configuring Trunk Group Settings

   Name	Description	Value
   Trunk Group	Name of the trunk group to which the port belongs.	Dependent on the switch type.
   Loop Protection	Enables or disables loop protection.	Enable or Disable Default: Disable

4. Select Enable in the Loop Protection drop-down.
5. Click OK.

6. To auto-recover ports when the switch detects a loop. Configure the following parameters.

   • Disable Timer—Move the toggle to on position to send an SNMP Simple Network Management Protocol. SNMP is a TCP/IP standard protocol for managing devices on IP networks. Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks, and more. It is used mostly in network management systems to monitor network-attached devices for conditions that warrant administrative attention.  trap when a port detects a disabled loop and manually re-enables the loop.

   • Time (in secs)—Configure the time to auto-enable the Disable Timer. This field supports integers between 1 to 604800.

7. Click Save Settings.