Spirent SmartBits System - LAN Series Modules

Chapter 9: Ethernet Cards
Feature Summary of 10/100 Mbps Cards
90 SmartBits System Reference
VFD1/2 (to 6 bytes) Cycle count up to 16.7 million Cycle count and stutter up to 4
billion
VFD 3 Buffer Size 2K bytes 2K bytes
Error generation: CRC, alignment,
dribble bits, symbol, undersize and
oversize
Yes Yes + Data Integrity errors (per
stream, L3 mode only) + Symbol
errors (100 Mbps only)
Error detection: CRC, alignment,
dribble bits, undersize and oversize
Yes Yes + Data Integrity Errors
Pre-capture Filtering Options CRC, alignment, oversize, undersize,
Rx triggers, or All
CRC, alignment, oversize,
undersize, data integrity errors, Rx
triggers, or All
Capture Buffer Size 475 frames 6500 frames
Packet Length 24 to 1600 bytes 24 to 1600 bytes
Pre-compute/insert IP Header
checksum
Yes Yes
Verify Data Integrity No Yes
Adjustable Preamble Length No No
VLAN Tagging predefined/selectable predefined/selectable
Background Fill Pattern, user-
selectable or random data
Yes Yes
2 Triggers (up to 6 bytes each); can
be specified using the bit offset or
using a pattern and mask. The
trigger counter can be set to: Trigger
1,Trigger 2; Trigger 1 or Trigger 2;
Trigger 1 and Trigger 2.
Yes Yes
Collisions Detected (Half duplex
only)
Yes Yes
Flow Control Yes Yes
Traffic Rates > wire speed > wire speed
1 Allows SmartMetrics tracking and histograms.
Table 9-5. Comparison of ML-7710 and LAN-3101A Cards
Feature ML-7710 LAN-3101A