Netgear XSM4348CS CLI Manual Software Version 12.x - Page 396

M4300 Intelligent Edge Series Fully Managed Stackable Switches spanning-tree vlan max-age Use this command to configure the spanning tree maximum age time for a set of VLANs. The default is 20 seconds. Set this value to a lower number to accelerate the discovery of topology changes. The network operator must take into account the end-to-end BPDU propagation delay and message age overestimate for their specific topology when configuring this value. The default setting of 20 seconds is suitable for a network of diameter 7, lost message value of 3, transit delay of 1, hello interval of 2 seconds, overestimate per bridge of 1 second, and a BPDU delay of 1 second. For a network of diameter 4, a setting of 16 seconds is appropriate if all other timers remain at their default values. Default Format Mode 20 seconds spanning-tree vlan vlan-list max-age seconds Global Config Parameter vlan-list max-age Description The VLANs to which to apply this command. The spanning tree maximum age time for a set of VLANs. The range is from 6-40 seconds. spanning-tree vlan root Use this command to configure the switch to become the root bridge or standby root bridge by modifying the bridge priority from the default value of 32768 to a lower value calculated to ensure the bridge is the root (or standby) bridge. The logic takes care of setting the bridge priority to a value lower (primary) or next lower (secondary) than the lowest bridge priority for the specified VLAN or a range of VLANs. Default Format Mode 32768 spanning-tree vlan vlan-list root {primary | secondary} Global Config Parameter vlan-list Description The VLANs to which to apply this command. spanning-tree vlan port-priority Use this command to change the VLAN port priority value of the VLAN port to allow the operator to select the relative importance of the VLAN port in the forwarding selection process when the port is configured as a point-to-point link type. Set this value to a lower number to prefer a port for forwarding of frames. Switching Commands 396 CLI Command Reference Manual