Ima-E1/T1 Interface Configuration; Overview - 3Com MSR 50 Series Configuration Manual

72 C 1: ATM
HAPTER AND
IMA-E1/T1 Interface
Configuration

Overview

DSL I C
NTERFACE ONFIGURATION
low transmission cost feature of DSL. So far, DSL technologies have been widely
adopted for broadband accessing.
ATM interfaces available for the low-end and mid-range routers
So far, the low-end and mid-range routers can provide the following ATM
interfaces:
IMA-E1/T1
■
ATM E3/T3
■
ATM 25.6 Mbps
■
ATM OC-3c/STM-1 based on SONET/SDH
■
ATM ADSL based on the ADSL technology
■
ATM GSHDSL based on the GSHDSL technology
■
These interfaces support IPoA, IPoEoA, PPPoA, and PPPoEoA. For more
information about them, refer to
ATM interface features
The ATM interfaces support:
Nonreal-time variable bit rate (nrt_VBR)
■
Real-time variable bit rate (rt_VBR)
■
Constant bit rate (CBR)
■
Unspecified bit rate (UBR)
■
Permanent virtual circuit (PVC)
■
Per-VC traffic shaping
■
User-to-network Interface (UNI)
■
RFC1483 Multiprotocol Encapsulation over ATM Adaptation Layer 5
■
RFC1577 Classical IP and ARP over ATM
■
F5 end to end loopback OAM
■
ATM adaptation layer 5 (AAL5)
■
This section covers these topics:
"Overview" on page 72
■
"Configuring an ATM E1/T1 Interface" on page 73
■
"Configuring an IMA Group" on page 73
■
"ATM IMA-E1/T1 Interface Configuration Example" on page 74
■
"Troubleshooting ATM IMA-E1/T1 Interfaces" on page 75
■
Inverse multiplexing for ATM (IMA) technology distributes an ATM cell stream over
multiple low-speed links on a cell by cell basis and reassembles the cells into the
original stream at the far end. It is a cheap way for you to transmit high-speed
ATM cell streams over low-speed links while allowing for great flexibility.
"ATM Configuration" on page 127.