metrotek ETS-1000L Operating Manual

ETS-1000L

Ethernet/Gigabit Ethernet loopback

Operating manual

Version 1.0.1, 2009

Metrotek

c

 Metrotek, 2006—2009
No part of this document may be reproduced in any form or by any means
without the written permission of Metrotek. Metrotek retains the right to make
changes to the hardware, software of ETS-1000L and to this document at any
time, without notice.

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Contents

1 General description 5

2 Supply kit 7

3 Overview 9

3.1 Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 External connectors . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Setting-up procedures 13

5 Loopback 15

5.1 Loopback adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 Remote management 19

6.1 OAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2 ET discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.3 Upgrading versions of the softwar e . . . . . . . . . . . . . . . . . . 21

7 Troubleshooting 23

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1. General description

Ethernet/Gigabit Ethernet loopback device ETS-1000L (referred to as de­vice, analyser) is intended for performing loopback at the physical, data link,
network and transport layers of the OSI model.

The device allows to carry out loopback control via OAM protocol and remote
control via TELNET protocol.

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2. Supply kit

Table 2.1. Supply kit

Item Quantity

Ethernet/Gigabit Ethernet loopback device ETS-1000L 1

Power supply unit GS06E (9 V, 0,3 A) 1

Operating manual 1

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3. Overview

3.1 Front panel

Front panel of ETS-1000L device is shown on the figure 3.1.

Figure 3.1. Front panel

LEDs

Green color of LEDs corresponds to a loopback layer:

• 1 — physical layer (1);

• 2 — data link layer (2);

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10 Overview

• 3 — network layer (3);

• 1+3 — transport layer (4).

L

The button for loopback mode control. To switch between layers 1, 2, 3, 4 or

turn loopback off, press this button as many time as needed.

Link speed LED indicators

LED indicators represents link speed.

Table 3.1. Speed LEDs

Speed LED LEDs color

10 Mbit/s 100 and 1000 green
100 Mbit/s 100 green
1000 Mbit/s 1000 green

LINK

LED is used to show link state:

• green — connection is established;

• off — no connection.

ACT

LED shows the data transmission state:

• green — data is being transmitted/received at the moment;

• off — no data is being transmitted or received at the moment.

FDX

LED shows Ethernet interface state:

• green — full-duplex connection;

• off — half-duplex connection.

Power

LED lights up when the power supply unit is plugged in.

3.2 External connectors

Location of external connectors on the top pa nel is shown on the figure 3.2.

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3.2 External connectors 11

Figure 3.2. Top panel

Tester connectors and equipment to be connected are described in the table 3.2.

Table 3.2. Connectors description

Description Connected equipment

RJ-45 connector to connect to the tested
network or equipment

Ethernet cable

SFP-module connectors SFP-module
External power unit connector Power supply unit

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4. Setting-up procedures

1. Get the tester from the box and make the external inspection. Check the
complect according to the table 2.1.

2. Plug in the power supply unit to the electric network (if you use mains
voltage 110–240 V with the 50–60 Hz frequency) and to the ETS-1000L.

3. The device is ready in 15 second.

4. To turn off the device switch off the power supply unit.

Note: if you want to restore default settings of the device hold the
button of a loop’s level choice (L) for 5 seconds. Three LEDs will
flash once for 1 second to inform you.

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5. Loopback

The Loopback function is necessary for networks testing in compliance with
the RFC 2544, as well as for a number of other tasks. This function allows to test
the network without changing it’s settings.

Network testing with the Loopback function can be performed at the four OSI
layers, jumbo frames are supported (up to 9600 byte).

• At the Physical layer (L1) all the incoming traffic is being retransmitted
backward without changing.

1

2

4

5

1

2

4

5

Figure 5.1. Loopback at the physical layer

All the connection schemes use the following notation:

– MAC Src — source MAC address;
– MAC Dst — destination MAC address;
– IP Src — source IP address;
– IP Dst — destination IP address.
– TCP/UDP Dst — destination TCP/UDP port number;
– TCP/UDP Src — source TCP/UDP port number.

• At the Data link layer (L2), the incoming traffic (without error frames) is
being retransmitted backward with swapping destination and source MAC
addresses.

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1

2

4

5

1

2

4

5

MAC Dst

MAC Src

IP Src

IP Dst

MAC Dst

MAC Src

IP Src

IP Dst

Figure 5.2. Loopback at the data link layer

Note: if a frames destination MAC address is not equal to the MAC
address of ETS-1000L, the frame will not be retransmitt ed.

Note: frames with equal destination and source MAC address are not
retransm itted at the data link, network and transport layers.

• At the Network layer (L3) the incoming traffic (without error packets)
is being retransmitted backward with source and destination IP and MAC
addresses swapping.

Note: the frame will be retransmitted only if a frames destination
MAC address and destination IP address are equal to the MAC and
IP address of ETS-1000L.

1

2

4

5

1

2

4

5

MAC Dst

MAC Src

IP Src

IP Dst

MAC Dst

MAC Src

IP Src

IP Dst

Figure 5.3. Loopback at the network layer

• At the Transport layer (L4) the incoming traffic (without error pack-
ets) is being retransmitted backward with source and destination IP and
MAC addresses swapping and sour c e and destination TCP/UDP addresses
swapping.

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5.1 Loopback adjustment 17

Note: the frame will be retransmitted only if a frames destination
MAC address and destination IP address are equal to the MAC and
IP address of ETS-1000L.

1

2

4

5

1

2

4

5

Figure 5.4. Loopback at the transpo rt layer

5.1 Loopback adjustment

Connect ETS-1000L to the Ethernet network and select Loopback layer by
pressing L button. Additional parameters (IP address, MAC address, etc.) are
being adjusted in the remote management mode (see section 6).

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6. Remote management

Telnet (Telecommunication Network) is a network protoco l used for access to
the remote network device. This network protoc ol allows the user of the personal
computer to cooperate with the device on the other end of connection. By means
of the commands presented in the table 6.1 and 6.2, it is p ossible to configure
device and view current settings.

To manage device over Telnet protocol connect ETS-1000L to personal com­puter through the Ethernet interface. Loopback must be switched off.

Default IP address of the loopback device is 192.168.1.1.

Username — admin, default password — admin.

Table 6.1. Remote management commands; show mode

Command

Information shown in the console or action

performed

show version software versions

show link the state of the interface

show ip address

interface IP address

show ip netmask interface subnet mask

show ip gateway gateway IP address

show mac interface MAC address

show gbe speed

interface sp eed

show gbe autonegotiation interface autonegotiation state

show gbe mac interface MAC address

show oam mode

OAM mode: off/active/passive

show oam discovery state of OAM discovery process

show tftp state of a TFTP server: on/off

show vlan mode vlan state: on/off

show vlan id

vlan identifier

show vlan priority vlan pri ority

reboot reboot device

configure

switch to configuration mode

exit finish session

help list of available commands

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Table 6.2. Remote management commands (Telnet); configuration mode

Command Operation

ip address set interface IP address

ip netmask

set interface subnet mask

ip gateway set gateway IP address

gbe mac set interface MAC address

gbe speed

set interface speed: 10/100/1000/automatic

gbe autonegotiation set autonegotiation mode: on/off

oam set OAM mode: off/active/passi ve

vlan mode

set vlan mode: on/off

vlan id

set vlan identifier (a number in the 0–4095 range)

vlan priority set vlan priority (a number i n the 0–7 range)

tftp enable or disable TFTP server: on/off

password

change admin’s password

save save settings; settings will be applied after device reboot

reboot reboot device

exit

leave configuration mode

help list of accessible commands

Note: configuration mode commands become effective after save and
reboot commands.

6.1 OAM

OAM (Operations, Administration, and Maintenance) is a protocol of the
link state monitoring. The protocol operates at the Data Link Layer of OSI
model. To transmit data between two Ethernet-devices, OAM protocol data units
(OAMPDU) are used.

An important feature of the OAM protocol is providing the ability to use Loop­back mode for the remote end. Both devices should support the IEEE 802.3ah
standard.

ETS-1000L and remote device should be connected directly.

Possible OAM s tates a re described below.

• Passive — passive mode. In passive mode, the p ort can only response to
Ethernet OAM commands from the r e mote device, but cannot initiate the
Loopback mode.

• Off — OAM is disabled.

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6.2 ET discovery

ET discovery function allows to switch off loopback mode or to change loop-

back level on ETS-1000L using ETS-1000.

.
.
.

Network

loopback

loopback

Figure 6.1. Connection diagram

In accordance with connection diagram it is possible to switch loopback mode
on for several devices ETS-1000L in series. The devices may be in the same or
in the different subnets.

Note: the loopback mode on the ETS-1000L devices may be switched
off or switched on.

6.3 Upgrading versions of the software

The last versions of the software for the ETS-1000L are accessible on the
Internet (http://www.metrotek.spb.ru/files/b3etl/release). To upgrade
to the latest versions of software it is necessary to execute sequence of ac tio ns.

1. Establish connection with the device over Telnet protocol, enter user name
and password.

2. Enable TFTP server (tftp on command in configure mode).

If you use Linux operating system:

1. Configure TFTP client for a work in binary mode (mode binary command).

2. Connect to the device by means of TFTP client (connect IP-address of device
command).

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3. Upload software package file with the new version of software (put path-to­file/image X.X.X.fs).

If you use Windows operating system:

1. Install tftp client o n yor PC (WinAgents TFTP Client for example).

2. Enter in cons ole terminal:

tftp.exe -i 192.168.1.1 put C:\work\image_X.X.X.fs

When the software package file is uploaded ETS-1000L will automatically

reboot.

Notes

• If current and new versions of t he software are very much differ­ent, settings are restored to default.

• In case of unsuccessful upgrade device work still may be restored.
Just hold the button of a loop’s level choice for 5 seconds while
turning on power supply.
Device will restore normal operation within 1 minute.

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7. Troubleshooting

Table 7.1. Troubleshooting

Failure symptom Possible reason Repair method

Connection is lost Incorrect cable connection Check cable connection

state

Two active connections at
the same time

Use only one active con­nection

No connection Incorrect connection set-

tings

Check autonegotiation
mode state and interface
settings

No telnet connection Loopback mode is on, in-

correct cable conn ection

Switch off Loopback m ode
and check cable connec­tion state

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