Spirent SmartBits System - Page 100

Chapter 9: Ethernet Cards
Feature Summary of Gigabit Cards
92 SmartBits System Reference
Table 9-7. SMB-200/2000 Gigabit Ethernet Cards — Feature Set Summar
Feature GX-1405B/1405Bs GX-1420B
Interface GX-1405B: 850 nm multi-mode, 1000 Base-SX
GX-1405Bs: 1300 nm single mode, 1000 Base-LX
RJ-45
Speed 1 Gbps 1 Gbps
Duplex Mode Full Only Full Only
SmartMetrics
1
No (Traditional)
Latency resolution +
100 ns +100 ns
Max Streams per Port 1 1
Alternate Streams 2 2
Max # flows per stream N/A N/A
VFD 3 Size 16K 16K
Capture Buffer Size 128K 128K
Packet Length 1 byte to 2KB+ 5 bytes to 2KB+
Verify IP Head.Checksum No Yes
CRC Errors Yes Yes
Alignment, Dribble, Under/
oversize, Symbol Errors
All but align and dribble All but align and dribble
Adjustable Preamble Length Yes Yes
MinTxInterpktGap
Max Tx Interpkt Gap
Increments
96 ns
1.5 sec
32 ns
96 ns
1.5 sec
32 ns
VLAN Tagging Yes Yes
Collisions Detected
2
N/A N/A
Flow Control Yes Yes
Traffic Rates > wire speed > wire speed
# Ports per Card 1 1
1 Allows SmartMetrics tests and histograms.
2 Only works in half duplex mode; not applicable to full duplex.