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Configuring the Switch
Class of Service (CoS): Managing Bandwidth More Effectively
Configuring the Switch
The CoS VLAN Priority Screen
If you configure CoS on this screen, CoS uses the criteria you specify per VLAN
to determine traffic prioritization unless the same traffic has other CoS criteria
(configured in other CoS screens) that has a higher precedence. (For prece-
dence information, see table 6-7, “Priority Criteria and Precedence”, on 6-134.)
To display the VLAN Priority screen, select
VLAN Priority in the CoS Menu screen
(page 6-139).
Figure 6-90. The CoS VLAN Priority Screen
The switch forwards
Default VLAN packets
at the “normal” priority.
If DEFAULT_VLAN is a
tagged VLAN, then the
packet leaves the
switch with an 802.1p
priority of 0 (normal
priority).
If the Finance VLAN is a tagged VLAN, and a packet enters the switch through this VLAN,
then the packet leaves the switch with the same 802.1p priority it had upon entry. If the packet
is not in a tagged VLAN when it enters the switch, the packet is sent to a “normal priority”
outbound port queue and leaves the switch with an 802.1p priority of 0 (normal priority).
The switch forwards Service VLAN packets
at the highest priority. In a tagged VLAN, the
packet leaves the switch with an 802.1p
priority of 7 (highest).