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DIGITAL LINK MEASURING INSTRUMENTS

•

Expandable to 320 ports (100BASE-TX)

Any combination of five interface modules can be installed in the

MD1230A. Moreover, a maximum of eight MD1230A units can be

daisy chained via Ethernet with one unit acting as a controller for all

units. Furthermore, time synchronization is performed by connect-

ing a clock to the daisy chain. Latency between any ports can be

measured. The number of ports can be expanded up to a maximum

of 320 by using the 10M/100M Ethernet module.

•

Real-time measurement of in-service traffic

Traffic monitoring

The MD1230A can measure send and receive byte/frame counts,

QoS frame counts in 8 priority ranks, counts of each error type, count

of SONET/SDH alarms, etc., in real time. In addition, when the

above-described filter function is used, specific frame traffic can be

measured for each port. This is an extremely powerful function

–

for example, in VPN services, specific MPLS VoIP frames (spec-

ified by UDP port number) can be extracted.

Latency

The MD1230A is able to measure the latency of simplex data trans-

fer. When up to eight MD1230A units are daisy chained, latency can

be measured by interconnecting a clock signal for time synchroniza-

tion. In addition, when a GPS antenna is connected, latency can be

measured between remote locations.

•

Full wire rate transmission of user-edited data stream

The MD1230A can send a maximum of 256 data streams per port at

the full wire rate. Data editing is a simple three-step procedure de-

scribed below.

Step 1: Setting frame data

The frame editor is used to edit the frame data for any of the

Ethernet, PPP, Cisco HDLC, ARP, IPv4, IPv6, IPX, MPLS, VLAN,

TCP, UDP, IGMP, RIP and DHCP protocols. The protocol header for-

mat is displayed on screen, and header input by the user is also sup-

ported. Part or all of the IP address and MAC address can be set to

increment, decrement or random. When IPv6, IP address portion of

32 bits less can be set to increment, decrement or random.

Module

10M/100M Gigabit

2.5G 10G

Ethernet Ethernet

No. of ports/module 8 2 1 1

No. of modules/unit 5 5 5 5

No. of ports/unit 40 10 5 5

No. of ports for 8

320 80 40 40

connections

Trigger Filter

Condition Remarks

condition condition

√√

Destination

10M/100M Ethernet and

MAC address

Gigabit Ethernet support those

√√

Source

conditions. MAC address

MAC address

mask permits portion match.

√√

Destination IP

2.5G (1.31), 2.5G (1.55), 10G

address

(1.31), 10G (1.55) support

√√

Source IP

those conditions. IP address

address

mask permits portion match

User-defined

Two sets of user-defined 32

√√

32 bit pattern

bit pattern conditions per port.

Sets offset and pattern match

√√

User-defined

at any frame position. Pattern

32 bit pattern

mask permits portion match.

Good frame, FCS error,

undersize, fragment, oversize,

oversize/FCS error, dribble

√√Error condition error, alignment error, IP

header checksum error, TCP

header checksum error, UDP

header checksum error

√√Ext. trigger input Rising edge of pulse

√ — Traffic over When traffic setting overflows

√ — Latency over When latency setting overflows

UDP header

Filtering to label

Filtering to VoIP frame at port

number field

MPLS tag

•

Powerful and flexible filter/trigger conditions

The MD1230A has powerful and flexible filter and trigger functions

that can be set independently for each port as shown in the follow-

ing table.

As an example, when filtering only VoIP frames on an MPLS net-

work, the MPLS label is specified as a 32 bit pattern (1), and VoIP

frames are specified at the UDP header port number field as a 32 bit

pattern (2). As a result, if only VoIP frames are captured on the

specified MPLS network, the number of packets can be counted.

•

Support for MPLS, IPv6, BGP4, etc., protocol decode

The 256 Mbyte max. capture buffer does not drop frames even at the

full wire rate of 10 Gbit/s. The in-service capture function is an es-

pecially powerful and useful tool for troubleshooting the causes of

network faults. Captured frames can be searched on the basis of

specified conditions and interesting frames can be selected and dis-

played. Each port has an independent capture buffer and is unaf-

fected by other ports.

Moreover, each of the Ethernet, PPP, LCP, MPLS, VLAN, ARP, IPv4,

ICMP, IPv6, TCP, UDP, IGMP, RIP, BGP4 and DHCP protocols can

be decoded and displayed for captured frames. When 10M/100M

Ethernet and Gigabit Ethernet, IPX can be decoded.

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