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Chapter 3 General Management of the Switch 3-87
To disable layer 3/4 traffic prioritization completely, use the following commands:
MIB Variables Associated With Traffic Prioritisation
3.3.5.5 Mapping IP Precedence
The Type of Service (ToS) octet in the IPv4 header includes three precedence bits
defining eight different priority levels ranging from highest priority for network
control packets to lowest priority for routine traffic. The default IP Precedence
values are mapped one-to-one to Class of Service values (Precedence value 0 maps
to COS value 0, and so forth). Bits 6 and 7 are used for network control, and the
other bits for various application types. ToS bits are defined in the following table:
When mapping IP Precedence values to COS values through the web interface or
CLI, the following parameters can be configured:
■ IP Precedence – The current IP Precedence to COS map.
Console(config)#no map ip precedence
Console(config)#no map ip dscp
TABLE 3-26 MIB Variables Associated With Traffic Prioritization
Field Name MIB Variable Access Value Range Default Value
IP Precedence/
DSCP Status
sun...
priorityMgt.
prioIpPrecDscpStatus
Read/write disabled (1),
precedence (2),
dscp (3)
disabled
TABLE 3-27 ToS Octet Traffic Types
Priority Level Traffic Type
7 Network Control
6 Internetwork Control
5 Critical
4 Flash Override
3 Flash
2 Immediate
1 Priority
0 Routine