Performing Loop-Back Tests; Ethernet Interface Loop Tests - SAF CFM-34-REBM Manual

4.6

Performing Loop-back Tests

The following loop tests are available for the CFM-34-REBM site:
Radio loopback,
−
Base-band loopback,
−
Traffic interface loopbacks.
−
The traffic interface loopback are not available for the primary Ethernet interface,
nor installed Ethernet module(s).
Any loopback test can be set locally from IDU LCD, Telnet or ASCII console; the Web
terminal allows to set loopbacks in the interface modules only.

4.6.1 Ethernet interface loop tests

The following schemes can be used to test either the primary 100Base-Tx or 10Base-
T module Ethernet port:
Setting local RF (if available), local baseband (digital or analog) or remote
−
baseband loop, and then testing the bridge using any diagnostic device that
generates packets and can process the returned data such as packet analyzers or
any other Ethernet performance analyzing devices (see figure below).
IDU
Baseband
Modem
Note: Before setting the digital baseband loopback, it is important to make sure
the far-end Ethernet bridge is disconnected from the LAN since the base-band
loopback is dual.
Pinging the far-end host (connected to the traffic port of the far-end IDU, see
−
figurte below) from the local host; this will verify both local (near-end) and
remote (far-end) Ethernet ports.
Management IDU
Controller
Ethernet
Baseband
Bridge Modem
PC
Modular Fast Ethernet Bridge Management System Technical Description and Configuration Guide
Management
Controller
Multiplexer
Packet Analyzer
O
D
U
Traffic channel
V. 3.12. 1.0 · © SAF Tehnika A/S 2003
Management PC
O
D
U
Baseband
IDU Management
Controller
Ethernet
Modem Bridge
PC
34