Allied Telesis Rapier Switch - Manual (Page 44)

44 Rapier Switch Software Reference
Software Release 2.5.1
C613-02025-00 REV B
port cannot transmit both tagged and untagged frames for the same VLAN
(that is, it cannot be added to a VLAN as both a tagged and an untagged port).
To remove ports from a VLAN, use the command:
DELETE VLAN={vlan-name|1..4094} PORT={port-list|ALL}
Removing an untagged port from a VLAN will return it to the default VLAN,
unless it is a tagged port for another static VLAN. An untagged port can only
be deleted from the default VLAN if the port is a tagged port for another static
VLAN.
Ports tagged for some VLANs and left in the default VLAN as untagged ports will
transmit broadcast traffic for the default VLAN. If this is not required, the unnecessary
traffic in the switch can be reduced by deleting those ports from the default VLAN.
To change the tagging status of a port in a VLAN, use the command:
SET VLAN={vlan-name|1..4094} PORT={port-list|ALL}
FRAME=TAGGED
To destroy a VLAN, use the command:
DESTROY VLAN={vlan-name|2..4094|ALL}
VLANs can only be destroyed if no ports belong to them.
To display the VLANs configured on the switch, use the command:
SHOW VLAN[={vlan-name|1..4094|ALL}]
Information which may be useful for trouble-shooting a network can be
displayed with the VLAN debugging mode. This is disabled by default, and
can be enabled for a specified time, disabled, and displayed using the
commands:
ENABLE VLAN={vlan-name|1..4078|ALL} DEBUG={PKT|ALL}
[OUTPUT=CONSOLE] [TIMEOUT={1..4000000000|NONE}]
DISABLE VLAN={vlan-name|1..4078|ALL} DEBUG={PKT|ALL}
SHOW VLAN DEBUG
To view packet reception and transmission counters for a VLAN, use the
command (see the Interfaces chapter of the switch’s Software Reference):
SHOW INTERFACE=VLANn COUNTER
Summary of VLAN tagging rules
When designing a VLAN and adding ports to VLANs, the following rules
apply.
1. Each port, except for the mirror port, must belong to at least one static
VLAN. By default, a port is an untagged member of the default VLAN.
2. A port can be untagged for zero or one VLAN. A port that is untagged for
a VLAN transmits frames destined for that VLAN without a VLAN tag in
the Ethernet frame.
3. A port can be tagged for zero or more VLANs. A port that is tagged for a
VLAN transmits frames destined for that VLAN with a VLAN tag,
including the numerical VLAN Identifier of the VLAN.