Allied Telesis AT-S83 - Manual (Page 204)

Chapter 9: Interface Configuration Mode Commands
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SWITCHPORT MODE TRUNK
Syntax
switchport mode trunk ingress-filter enable|disable
no switchport mode
Parameters
ingress-filter Sets the ingress filtering for the received frames. Choose
from the following options:
enable Sets the ingress filtering for received frames.
Received frames that cannot be classified in the
previous step based on the acceptable frame
type parameter (access/trunk) are discarded.
disable Turns off ingress filtering to accept frames that
do not meet the classification criteria. This is the
default value.
Description
Use the SWITCHPORT MODE TRUNK command to set the switching
characteristics of the Layer-2 interface to trunk mode and specify tagged
frames only. Received frames are classified based on the VLAN
characteristics. Then they are accepted or discarded based on the
specified filtering criteria.
Use the no form of this command to reset the mode of the Layer-2
interface to the default value which is ingress filtering is off and all frame
types are classified and accepted.
Command Mode
Interface mode
Example
The following commands enable ingress filtering for received frames:
switch#configure terminal
switch(config)#interface xe6
switch(config-if)#switchport mode trunk ingress-filter
enable