Inverse Multiplexing For Atm (Ima) Overview - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide
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Inverse Multiplexing for ATM (IMA) Overview

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184
user@host# pattern number
user@host# period number
For information about test procedure, see
ACX Series Router" on page
Configure a transmit clock to reflect the primary reference source (PRS) of the clock
8.
for each link in a group either in common timing mode or independent timing mode.
By default, timing mode is selected.
common
[edit interface interface-name ima-atm-options]
user@host# set transmit-clock (common | independent)
Configure the IMA specification version as either version 1.0 or version 1.1. By default,
9.
IMA version 1.1 is selected.
[edit interface interface-name ima-atm-options]
user@host# set version (1.0|1.1)
Understanding ATM IMA Configuration on ACX Series Router on page 174
Inverse multiplexing for ATM is a technique of transporting ATM traffic over a bundle of
T1 or E1 interfaces. Inverse multiplexing is the opposite of multiplexing. Multiplexing is a
technique of combining multiple signals into a single signal. Inverse multiplexing is a
technique that divides a data stream into multiple concurrent streams that are transmitted
at the same time across separate channels (such as T1 or E1 interfaces) and then
reconstructed at the other end back into the original data stream. Inverse multiplexing
is used to speed up the flow of data across a slower interface, such as a T1 or E1 interface,
by load balancing the data stream across multiple T1 or E1 interfaces, increasing the line
capacity.
With ATM inverse multiplexing, an ATM cell stream is transported over a bundle of T1 or
E1 interfaces called an IMA group. The ATM cells are inverse multiplexed and
demultiplexed cyclically across the IMA group to create a higher-bandwidth logical link
whose rate is approximately the sum of all the interfaces in the group.
Configuring Inverse Multiplexing for ATM (IMA) on page 185
"Understanding ATM IMA Configuration on
174.
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