Zte ZXR10 GER, Руководство пользователя

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ZXR10 GER (V2.6.03) General Excellent Router User Manual Volume-I
100 Confidential and Proprietary Information of ZTE CORPORATION
network does not route cells belonging to a particular virtual
circuit. All cells belonging to a particular virtual path are routed
the same way through the ATM network, thus resulting in faster
recovery in case of major failures.
Service Class Quality of Service Parameters
Constant Bit Rate
(CBR)
This class is used for emulating circuit
switching. The cell rate is constant with time.
CBR applications are quite sensitive to cell-
delay variation. Examples of applications
that can use CBR are telephone traffic (i.e.,
nx64 kbps), videoconferencing, and
television.
Variable bit rate–
non-real time (VBR–
NRT)
This class allows users to send traffic at a
rate that varies with time depending on the
availability of user information. Statistical
multiplexing is provided to make optimum
use of network resources. Multimedia e-mail
is an example of VBR–NRT.
Variable bit rate–real
time
(VBR–RT)
This class is similar to VBR–NRT but is
designed for applications that are sensitive
to cell-delay variation. Examples for real-
time VBR are voice with speech activity
detection (SAD) and interactive compressed
video.
Available bit rate
(ABR)
This class of ATM services provides rate-
based flow control and is aimed at data
traffic such as file transfer and e-mail.
Although the standard does not require the
cell transfer delay and cell-loss ratio to be
guaranteed or minimized, it is desirable for
switches to minimize delay and loss as much
as possible. Depending upon the state of
congestion in the network, the source is
required to control its rate. The users are
allowed to declare a minimum cell rate,
which is guaranteed to the connection by the
network.
Unspecified bit rate
(UBR)
This class is the catch-all, other class and is
widely used today for TCP/IP.
ZTE ZXR10 GER provides ATM 155M and ATM 622M standard
speed interfaces. They can support IP Over ATM, Encapsulation
of IP Over ATM LLC/SNAP, ATM AAL5, IP routing, ATM cell
processing, 256 PVCs and point-to-point connection.
Refer to below procedure for ATM configuration on ZTE ZXR10
GER Routers.
Router Command Line Interface has been accessed.
1. To enter into configuration mode, use
config terminal
command in privileged mode, as shown in Table 104.
ATM Standards
Purpose
Prerequisite
Steps