UTStarcom iSpirit 3026, Руководство пользователя

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In this Section how to configure iSpirit 3026 switch with QoS service according to QoS command
The switch forwards all data flow through switch with the same priority when the switch is not
configured with QoS to ensure the reliability, delay and throughput.
Some applications need low delay, some applications need to be improved with reliability, and
some applications need to be equipped with steady throughput, when QoS function of switch
needs to be started, and switch can carry out different PRI processing for different data flow.
Notes: please refer to the Command Reference introduced in this Section if you need detail info
of QoS command
12.1 Introduction to QoS
iSpirit 3026 switch realizes powerful QoS function.
iSpirit 3026 switch realizes powerful QoS function. With the QoS function you can make the
important data forwarded by the switch be processed, and make bandwidth limitation for some
data, which make your bandwidth of network is more reasonable for using, and network
performance can be forecasted.
iSpirit 3026 switch realizes QoS function of DiffServ System based on IETF standard, make
classification for data flow in the bcommandline of QoS field, indicate DSCP value for all data,
and make PRI processing based on the DSCP value of data flow in QoS field. iSpirit 3026 switch
not only realize the QoS of DiffServ, but also realize the QoS of 802.1p and QoS of IP
Precedence applied in early times.
Different QoS makes use of different PRI signs, and three kinds of QoS signs are introduced
●
QoS of 802.1p
QoS of 802.1p makes use of the highest three digits in TAG sign with 2 bytes in Ethernet frame
as its PRI, please refer to Figure 12-1. the range of PRI is from 0 to 7. If you use of QoS of
802.1p in QoS field, all data packets forwarded in the Internet should be signed with TAG, and a
small range local Internet is available.