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Chapter 22 QoS
The following section lists the commands for this feature.
Table 107 DSCP to priority bit mapping command summary
COMMAND
dscp <dscp/priority>
show dscp
interface dsl <slot/portlist>
dscp active
no dscp active
show interface dsl <slot/
portlist> dscp
22.1.1 Command Examples
This example shows how to map DSCP 48 to priority 6 so the IES will map incoming packets with a
DSCP value of 48 to 802.1p tag 6. The packets can safely traverse DSCP-incapable links. This
example also enables DSCP to IEEE 802.1p priority mapping on DSL port 1 of the line card in slot 2.
ras# show dscp
DSCP to p-bit mapping table :
DSCP -> Priority : 0 -> 0
DSCP -> Priority : 1 -> 0
----------SNIP!--------------------------
DSCP -> Priority :
----------SNIP!--------------------------
ras# config
ras(config)#
ras(config)# interface dsl 2/1
ras(config-interface-dsl-2/1)#
ras(config-interface-dsl-2/1)# exit
ras(config)#
DSCP status :
ras#
show dscp
DSCP to p-bit mapping table :
DSCP -> Priority : 0 -> 0
DSCP -> Priority : 1 -> 0
----------SNIP!--------------------------
DSCP -> Priority :
----------SNIP!--------------------------
ras#
22.2 QoS Commands
Use these commands for configuring Quality of Service settings.
Quality of Service (QoS) refers to both a network's ability to deliver data with minimum delay, and
the networking methods used to control the use of bandwidth. Without QoS, all traffic data is
equally likely to be dropped when the network is congested. This can cause a reduction in network
156
DESCRIPTION
Maps the specified DSCP to the specified IEEE 802.1p priority bit.
dscp: 0-63
priority: 0-7
Displays the DSCP to IEEE 802.1p priority bit mapping settings.
Enters the sub-command mode for configuring the specified DSL
ports.
Enables DSCP to priority bit mapping on the port(s).
Disables DSCP to priority bit mapping on the port(s).
Displays the status of DSCP to priority bit mapping on the specified
DSL ports.
48 -> 0
dscp 48/6
dscp active
show interface dsl 2/1 dscp
enable
48 -> 6
M
P
C
13
E
13
C
13
C
13
C
13
E
13
IES4005M User's Guide
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Troubleshooting
