ZyXEL Communications IES4005M, Руководство пользователя

Страница: 156 / 236

Chapter 22 QoS
IES4005M User’s Guide
156
The following section lists the commands for this feature.
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.
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
Table 107
DSCP to priority bit mapping command summary
COMMAND DESCRIPTION M P
dscp < dscp / priority >
Maps the specified DSCP to the specified IEEE 802.1p priority bit.
dscp
: 0-63
priority
: 0-7
C 13
show dscp
Displays the DSCP to IEEE 802.1p priority bit mapping settings. E 13
interface dsl < slot/portlist >
Enters the sub-command mode for configuring the specified DSL
ports. C 13
dscp active
Enables DSCP to priority bit mapping on the port(s). C 13
no dscp active
Disables DSCP to priority bit mapping on the port(s). C 13
show interface dsl <slot/
portlist> dscp
Displays the status of DSCP to priority bit mapping on the specified
DSL ports. E 13
ras# show dscp
DSCP to p-bit mapping table :
DSCP -> Priority : 0 -> 0
DSCP -> Priority : 1 -> 0
----------SNIP!--------------------------
DSCP -> Priority : 48 -> 0
----------SNIP!--------------------------
ras# config
ras(config)# dscp 48/6
ras(config)# interface dsl 2/1
ras(config-interface-dsl-2/1)# dscp active
ras(config-interface-dsl-2/1)# exit
ras(config)# show interface dsl 2/1 dscp
DSCP status : enable
ras# show dscp
DSCP to p-bit mapping table :
DSCP -> Priority : 0 -> 0
DSCP -> Priority : 1 -> 0
----------SNIP!--------------------------
DSCP -> Priority : 48 -> 6
----------SNIP!--------------------------
ras#