Allied Telesis Support Portal

Loop Protection behaviour of GS910 and GS920 Series switches

In a network using a mix of GS910 and GS920 Series switches, which switch is root for Loop Protection?

When loop protection is enabled on the GS910 and GS920 Series of unmanaged switches, one switch must be designated as the Root switch. The switches will automatically determine which will be the root switch based on a level of priority and on the lowest MAC address.
Higher Priority Switches are:
  • GS920/8
  • GS910/5E, GS910/5, GS910/8E, GS910/8
Lower Priority Switches are:
  • GS920/16, GS920/24
  • GS910/26, GS910/24
In a network which contains only Higher Priority switches, the switch with the lowest MAC address will become Root.
In a network containing both Higher and Lower Priority Switches, the Higher Priority switch with the lowest MAC address will become Root.
In a network which contains only Lower Priority switches, the switch with the lowest MAC address will become Root.