Quality of Service
Mapping IP Precedence to Queues
Cisco Small Business SG200 Series 8-port Smart Switch
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Mapping IP Precedence to Queues
The priority of a packet arriving at an interface can be identified by the
Type of Service (ToS) field in an IP packet header. Eight precedence levels are
defined (0-7). You can use the
IP Precedence to Queue
page to map these values
to the four. CoS queues to steer packets to the appropriate outbound queue.
Queue1 has the lowest priority and queue 4 has the highest priority.
NOTE
IP Precedence-to-queue mapping is configured per interface. Configure these
mapping values on the incoming interface.
To map IP precedence values to queues:
STEP 1
Click
Quality of Service
>
IP Precedence to Queue
in the navigation window.
STEP 2
Select from the Interface drop-down menus the Port or the LAG to configure.
STEP 3
For each IP Precedence value, select a queue from the Output Queue list. Queue1
has the lowest priority, and queue 4 has the highest priority.
STEP 4
Click
Apply
. Your changes are saved to the Running Configuration.
To apply these mappings to all other interfaces on the switch, click
Copy Settings
to All Interfaces
.
802.1p Priority
Output Queue
0
3
1
1
2
2
3
4
4
5
5
6
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7
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