Class of Service
13-10
13
Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding
behaviors. The DSCP replaces the ToS bits, but it retains backward compatibility
with the three precedence bits so that non-DSCP compliant, ToS-enabled devices,
will not conflict with the DSCP mapping. Based on network policies, different kinds of
traffic can be marked for different kinds of forwarding. The DSCP default values are
defined in the following table. Note that all the DSCP values that are not specified
are mapped to CoS value 0.
Command Attributes
•
DSCP Priority Table –
Shows the DSCP Priority to CoS map.
•
Class of Service Value –
Maps a CoS value to the selected DSCP Priority value.
Note that “0” represents low priority and “7” represent high priority.
Note:
IP DSCP settings apply to all interfaces.
Web
– Click Priority, IP DSCP Priority. Select an entry from the DSCP table, enter a
value in the Class of Service Value field, then click Apply.
Figure 13-7 IP DSCP Priority
Table 13-4 Mapping DSCP Priority
IP DSCP Value
CoS Value
0
0
8
1
10, 12, 14, 16
2
18, 20, 22, 24
3
26, 28, 30, 32, 34, 36
4
38, 40, 42
5
48
6
46, 56
7
Summary of Contents for 8926EM
Page 6: ...ii ...
Page 34: ...Getting Started ...
Page 44: ...Introduction 1 10 1 ...
Page 62: ...Initial Configuration 2 18 2 ...
Page 64: ...Switch Management ...
Page 76: ...Configuring the Switch 3 12 3 ...
Page 118: ...Basic Management Tasks 4 42 4 ...
Page 164: ...User Authentication 6 28 6 ...
Page 176: ...Access Control Lists 7 12 7 ...
Page 284: ...Quality of Service 14 8 14 ...
Page 294: ...Multicast Filtering 15 10 15 ...
Page 300: ...Domain Name Service 16 6 16 ...
Page 310: ...Dynamic Host Configuration Protocol 17 10 17 ...
Page 320: ...Configuring Router Redundancy 18 10 18 ...
Page 344: ...IP Routing 19 24 19 ...
Page 356: ...Unicast Routing 20 12 20 Web Click Routing Protocol RIP Statistics Figure 20 5 RIP Statistics ...
Page 386: ...Unicast Routing 20 42 20 ...
Page 388: ...Command Line Interface ...
Page 400: ...Overview of the Command Line Interface 21 12 21 ...
Page 466: ...SNMP Commands 24 16 24 ...
Page 520: ...Access Control List Commands 26 18 26 ...
Page 546: ...Rate Limit Commands 30 2 30 ...
Page 612: ...VLAN Commands 34 24 34 ...
Page 626: ...Class of Service Commands 35 14 35 ...
Page 670: ...DHCP Commands 39 16 39 ...
Page 716: ...IP Interface Commands 41 36 41 ...
Page 768: ...IP Routing Commands 42 52 42 ...
Page 770: ...Appendices ...
Page 791: ......