Allied Telesis X900-48FE, RAPIER I, AT-8900, AT-9900 Command Reference Updates, Create switch trunk

Software Version 2.8.1 33

Command Reference Updates

This section describes each new command and the changed portions of modified commands and output screens. For modified commands and output, new parameters, options and fields are shown in bold.

create switch trunk

Syntax CREate SWItch TRunk=trunk [POrt=port-list] [SPeed={10M100M1000M10G}]

[THRASHAction={LEarndisableLINKDownNONEPOrtdisableV LANdisable}] [THRASHTimeout={None1..86400}]

Description This command creates a trunk group on the switch and optionally adds ports to the trunk group and sets port speed. must not be in another trunk group

The thrashaction parameter specifies the action the router or switch takes when it detects MAC address thrashing on a trunk. Thrashing occurs when one or more ports or trunks repeatedly learn the same MAC addresses, for example, as a result of a network loop. The router or switch applies the trunk’s thrashaction to all ports in the trunk.

Take care with the thrashaction parameter because misuse can impair your network operation.

Set the thrashaction parameter to:

■none to apply no thrash limiting on the trunk.

■learndisable to disable MAC address learning on all ports in the thrashing trunk, until the period specified with the thrashtimeout parameter has elapsed. The default is learndisable.

■portdisable or linkdown to disable all ports in the thrashing trunk until either the period specified by the thrashtimeout parameter has elapsed, or until the ports or subset of ports in the trunk are re-enabled by the enable switch port command. If linkdown is specified, the link state is down; if portdisable is specified, the link state remains up.

■vlandisable to block all traffic on the VLAN where the address was learned, on all ports in the thrashing trunk, until either the period specified by thrashtimeout has elapsed, or until the ports are re-enabled using the enable switch port vlan command. When thrashaction=vlandisable, there is only one timer per trunk, so if multiple VLANs have been disabled on a trunk, the timer starts when the last VLAN was disabled. When the timer expires, all VLANs are re-enabled on the trunk. When thrashaction=vlandisable, ingress filtering is automatically enabled on all ports in the trunk.

The thrashtimeout parameter specifies the time, in seconds, for which the switch employs the thrash action specified by the thrashaction parameter. The thrashtimeout cannot be set to none if thrashaction=learndisable. If thrashtimeout=none, and thrashaction is then changed to learndisable, then the router or switch automatically changes the thrashtimeout to 1 second.

If none is specified, the trunk is not automatically re-enabled, but individual ports can be re-enabled by using the enable switch port command for thrashaction=portdisable or linkdisable, and the enable switch port vlan command for thrashaction=vlandisable. The default is 1 second.

Software Version 2.8.1 C613-10477-00 REV B