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DIGITAL LINK MEASURING INSTRUMENTS

176 For product ordering information, see pages 4 –10

DATA QUALITY ANALYZER

MD1230A

Complete Performance Testing and Monitoring with One Unit

IP Networks are spreading rapidly throughout society in line with the

expansion of networks carrying voice, video, and mission-critical

data. And now maintenance of network quality has become an im-

portant theme.

Development of network equipment and systems requires the mea-

surement of network performance and QoS evaluations. In addition,

network operations and maintenance require monitoring of in-ser-

vice traffic, latency, and frame arrival time variation (frame jitter) as

well as prompt troubleshooting.

The MD1230A integrates both performance testing and network

monitoring into one instrument.

Applications

•

R&D

RFC2544 test

The six standard RFC1242 and RFC2544 tests: Throughput,

Latency, Frame Loss Rate, Back-to-Back-Frame, System Recovery,

and Reset, can be performed automatically with the results displayed

graphically or in table form. The test efficiency has been improved

through automation.

BGP4 link flap/route flap test

The MD1230A can emulate the BGP4 (Border Gateway Protocol ver-

sion 4) speaker for a maximum of 8 devices. It can also perform link

flap tests for neighboring routers and route flap tests for up to 800

routes. (However, it cannot use routes advertised by the DUT in the

route flap test.)

•

Manufacturing

Automated testing using GPIB commands (MD1230A Option 02)

Preset test items for production lines of network devices, etc., can be

executed automatically and the measurement results saved. The

MD1230A supports GPIB commands and almost all its functions can

be executed via GPIB. In addition, several MD1230As can be con-

trolled from one controller. Since the automated control programs

use well-known GPIB commands, users' development costs of appli-

cation software can be saved.

•

Maintenance

VPN QoS traffic monitoring

Since traffic can be measured according to 8 priority levels based on

the VLAN tag user priority field specified by IEEE802.1D and the

least 3 bits of the DSCP field specified by RFC2474, it is also possi-

ble to measure QoS traffic for other packets not generated by the

MD1230A.

If user-defined filters are used, VoIP traffic (specified UDP port num-

ber) to which specific MPLS labels are appended can be measured

in real time.

Protocol analysis

Layer 2 to Layer 4 protocol decode can be performed on captured

packets. Any problems with frame transportation are basically cov-

ered by the MD1230A protocol decode function of Layer 2 to Layer

Remote latency (MD1230A Option 05)

The MD1230A has an optional GPS function and it can perform time

synchronization with remote MD1230A units to measure frame la-

tency of a long distance. Moreover, the capture function can be trig-

gered when the measured latency exceeds the user setting. At pre-

sent, there are services for guaranteeing VPN latency but if these

services develop a fault, the MD1230A is very helpful.

Functions

•

Physical interface for 10 Mbit/s to 10 Gbit/s

The MD1230A has the interface modules shown in the table below,

and other interface modules will be added to the list. The Gigabit

Ethernet Module has a Giga-Bit Interface Converter (GBIC) that can

be changed to support 1000BASE-SX/LX/LH/ZX ports.

10/100M Ethernet Module 8 ports

Gigabit Ethernet Module 2 ports

2.5G (1.31) Module 1 port

2.5G (1.55) Module 1 port

10G (1.31) Module 1 port

10G (1.55) Module 1 port

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