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Mapping dscp priority, Mapping dscp priority -195, Table 3-14 mapping dscp priority -195 – SMC Networks SMC TigerStack 1000 SMC8748M User Manual

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C

LASS

OF

S

ERVICE

C

ONFIGURATION

3-195

CLI – The following example globally enables IP Precedence service on
the switch, maps IP Precedence value 1 to CoS value 0 (on port 1), and
then displays the IP Precedence settings.*

* Mapping specific values for IP Precedence is implemented as an interface

configuration command, but any changes will apply to the all interfaces on the
switch.

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.

Console(config)#map ip precedence

4-269

Console(config)#interface ethernet 1/1

4-174

Console(config-if)#map ip precedence 1 cos 0

4-270

Console(config-if)#end
Console#show map ip precedence ethernet 1/1

4-274

Precedence mapping status: disabled

Port Precedence COS
--------- ---------- ---
Eth 1/ 1 0 0
Eth 1/ 1 1 0
Eth 1/ 1 2 2
Eth 1/ 1 3 3
Eth 1/ 1 4 4
Eth 1/ 1 5 5
Eth 1/ 1 6 6
Eth 1/ 1 7 7
Console#

Table 3-14 Mapping DSCP Priority

IP DSCP Value

CoS Value

0

0

8

1

10, 12, 14, 16

2

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