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Quality of Service
Mapping IP Precedence to Queues
Cisco Small Business SG200 Series 8-port Smart Switch 170
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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
03
11
22
34
45
56
67
78