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W
I
EB
NTERFACE
Parameter
VLAN and Priority
Port VID
Port Default
Priority
2
VLAN
Tagging
2. This switch supports Quality of Service (QoS) by using two priority
queues, with Weighted Fair Queuing for each port. Inbound frames that
do not have VLAN tags are tagged with the input port's default ingress
user priority, and then placed in the appropriate priority queue at the
output port. The default priority for all ingress ports is zero. Therefore,
any inbound frames that do not have priority tags will be placed in the
low priority queue of the output port. (Note that if the output port is an
untagged member of the associated VLAN, these frames are stripped of
all VLAN tags prior to transmission.)
3. If you want to create a small port-based VLAN for just one or two
switches, you can assign ports to the same untagged VLAN (and use a
separate connection where a VLAN crosses the switches). However, to
participate in a VLAN group that extends beyond this switch, we
recommend using the VLAN ID for that group, by VLAN tagging. For
Layer 2 switching, ports assigned to a large VLAN group that crosses
several switches must use VLAN tagging.
3-38
Default
1
0
Rx All,
3
Tx All
Description
These fields set the default values for VLANs,
port priority, GVRP and GMRP.
The VLAN ID assigned to untagged frames
received on this port.
Set the default ingress priority to any value
beneath the priority threshold (page 3-33) to
specify the low priority queue, or to any value
equal to or above this threshold to specify the
high priority queue.
Indicates whether or not VLAN tags will be
included on frames transmitted out of this
port. The options include:
Rx All:
Accepts all frames, tagged or
untagged.
Rx Tag:
Only accepts tagged frames. The
switch will only accept frames if
the PVID and frame tag are the
same.
Tx All:
If the PVID and the frame tag are
the same, sends a tagged frame,
otherwise sends an untagged frame.
Tx Untag: Sends only untagged frames.
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