Spirent SmartBits System, Reference Manual

Page: 153 / 278

Chapter 11: ATM Cards
ATM Introduction
SmartBits System Reference 145
ATM Introduction
The ATM series of SmartCards is used to generate and monitor ATM network traffic.
Applications include testing ATM-to-LAN internetworking devices, very high
performance ATM backbones, xDSL devices, and LAN-to-ATM edge devices. The
capabilities of the ATM SmartCards include frame-level testing at full-duplex, full wire-
rate testing of edge devices and switches, switch testing at full-cell rate, and high-rate
signaling testing for edge devices.
For all ATM cards, latency is measured from frame transmit rates between cards, with
100ns resolution, and is measured based on the first frame of each ATM stream.
A trigger is a pattern tracking tool that identifies any packet with a specific pattern located
inside any of the packets received by a receiving SmartBits card. The receiving card then
counts the number of triggers received with the specific pattern.
Inserted into ATM cells as a pattern tracking tool, triggers appear in ATM cells according
to the ATM card type:
•
AT-9015, AT-9020, and AT-9025 cards – Latency is measured from frame transmit
rates between an AT-9xxx and other SmartBits cards, with 100ns resolution. These
cards allow one transmit or receive trigger to be defined per card and a maximum of
512 calls per second.
•
AT-034B, AT-9045B, AT-9155C, AT-9155Cs, AT-9622, and AT-9622s cards – These
cards support one trigger per connection for a maximum of 2,048 triggers per card
and a maximum of 800 calls per second.
ATM SmartCards feature the following expanded capabilities:
•
Measurement of peak call rate and setup latencies for SVCs in SmartSignaling.
•
Generates frames up to 2,048, PVCs and SVCs. (AT-034B, AT-9045B, AT-9155C, AT-
9155Cs, AT-9622, and AT-9622s cards.)
•
Supports PPP testing with up to 2,048 PPP sessions. (AT-034B, AT-9045B, AT-
9155C, AT-9155Cs, AT-9622, and AT-9622s cards.)
•
Supports LANE testing with up to 64 LECs.
•
Supports up to 8.38 million VCCs per port. (AT-034B, AT-9045B, AT-9155C, AT-
9155Cs, AT-9622, and AT-9622s cards.)
•
AAL5 protocol support for ILMI, UNI 3.x, LAN Emulation Client 1.0, and LLC/
SNAP per RFC-1483; Classical IP per RFC-1577; and PPP per RFCs 1661 and 2364.
•
Standard traffic contract parameters are user-definable per VCC based on:
– Constant Bit Rate (CBR): PCR, CDVT.
– Unspecified Bit Rate (UBR): PCR
•
Supports frame latency measuerments with 100 ns timestamp resolution. Fully
compatible with legacy LAN SmartCards.