Configuring Atm Interfaces; Atm Interface; Atm; Atm Interfaces Available On The Hsr6800 Routers - HP HSR6800 Configuration Manual

Configuring ATM interfaces

ATM interface

ATM

Asynchronous Transfer Mode (ATM) is a backbone network technology for transmission of audio, video,
and data. By virtue of its flexibility and support for multimedia services, ATM is regarded as a core
technology for implementing broadband communications.
The ATM physical layer lies at the bottom of the ATM reference model. Though it involves specific
transmission media, its functionality does not rely on the transmission mechanism and speed of a specific
medium. Rather, it primarily delivers valid cells and the associated timing signals between the upper
layer and transmission medium. The speeds of physical access media are defined in international
standards such as ATM OC-3c/STM- 1 and ATM E3/T3.

ATM interfaces available on the HSR6800 routers

The HSR6800 routers provide the following ATM interfaces:
• IMA-E1/T1
ATM OC-3c/STM- 1 based on SONET/SDH
•
These interfaces support IPoA, IPoEoA, PPPoA, and PPPoEoA. For more information about them, see Layer
2—WAN Configuration Guide.

ATM interface features

The ATM interfaces of low-end and middle-range routers 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
•
RFC2225, Classical IP and ARP over ATM
•
RFC2390, Inverse Address Resolution Protocol
•
• F5 end to end loopback OAM
ATM adaptation layer 5 (AAL5)
•
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