Allied Telesis RAPIER I - Manual (Page 33)

Software Version 2.8.1 33
Software Version 2.8.1
C613-10477-00 REV B
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={10M|100M|1000M|10G}]
[THRASHAction={LEarndisable|LINKDown|NONE|POrtdisable|V
LANdisable}] [THRASHTimeout={None|1..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.