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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
234
4.10.2.4 Mapping IP Precedence Priority
The Type of Service (TOS) octet in the IPv4 header includes three precedence bits defining eight different priority levels ranging
from highest priority (7) for network control packets to lowest priority (0) for routine traffic. Bits 6 and 7 are used for network
control, and the other bits for various application types. Precedence values are defined in the following table.
IP Precedence Value Traffic Type Default CoS Output Queue
0
Routine
0
1
Priority
0
2
Immediate
1
3
Flash
1
4
Flash Override
2
5
Critical
2
6
Internetwork Control
3
7
Network Control
3
Table 4-10-4 Mapping IP Precedence Values to CoS Priority Queues
1. Click QoS, Priority, IP Precedence Priority Status.
2. Set the IP Precedence Priority Status to Enabled.
3. Click QoS, Priority, IP Precedence Priority.
4. Select an entry from the IP Precedence Priority Table, enter a queue number in the Class of Queue Service Value field, and
then click Apply.
4.10.2.5 IP Precedence Priority Status
Figure 4-10-7 IP Precedence Priority Status page screenshot
The page includes the following fields:
Object Description
IP Precedence Priority
Status
Enables or disables the IP Precedence priority.