Allied Telesis AT-S106 - Manual (Page 65)

AT-S106 Management Software Web Browser User’s Guide
65
Configuring CoS
As explained in “Overview” on page 60, a packet received by a port is
placed it into one of four priority queues on the egress port according to
the switch’s mapping of 802.1p priority levels to egress priority queues.
The default mappings are shown in Table 1 on page 61.
You can override the mappings at the port level by assigning a new default
egress queue to a port. Note that this assignment is made on the ingress
port before the frame is forwarded to the egress port. Consequently, you
need to configure this feature on the ingress port. For example, you can
configure a port so that all ingress frames are stored in egress queue 3 of
the egress port, regardless of the priority levels that might be in the frames
themselves, as found in tagged frames.
Note
Configuring CoS for a port only affects packets as they pass
internally through the switch. The switch does not alter the original
priority level of tagged frames themselves. Frames leave the switch
with the same priority level they had when they entered the switch.
To configure CoS for a port, do the following procedure:
1. From the main menu on the left side of the page, select Bridge.
The Bridge folder expands to show the VLAN folder.
2. From the VLAN folder, select Default Port VLAN & CoS.
The Default Port VLAN & CoS Page is displayed. A partial view is
shown in Figure 22.
Figure 22. Default Port VLAN & CoS Page