Specifications

Hardware Reference 43
C613-03023-00 REV P
Test Facility
The Test Facility is built into the AlliedWare operating system, and is the best
method to verify the correct operation of all PICs except the AT-AR026. Testing
can be performed while the switch or router is operational, but any interfaces
being tested are dedicated to the Test Facility. For more information about the
Test Facility, see the Test Facility chapter of the AlliedWare
®
Operating System
Software Reference.
The AT-AR026 PIC does not support the AlliedWare operating system’s
diagnostic or Test Facility features. AT-AR026 PICs include a switch chip that
switches independently of the switch, router, or NSM that the PIC is installed
in. The show interface command will show each correctly installed AT-AR026
as a single interface. The 10/100 “front side” Ethernet ports will not be shown.
PICs support a wide range of interface types, including Ethernet,
asynchronous, synchronous, Basic Rate ISDN and Primary Rate ISDN. Each
interface type can be tested independently using the Test Facility software.
For the Test Facility to operate, you must install a loopback plug or cable on
some interfaces. See Table 17 on page 43 for a list of interface types and their
loopback requirements. “Loopback Plugs for Testing Interfaces” on page 35
describes how to construct a loopback plug or cable.
Table 17: Loopback plugs, cables and devices required for testing PIC interfaces
Switch Interface Loopback plug, cable or test device required
Asynchronous RJ-45 asynchronous loopback plug.
Use one plug to individually test each port one by one, or all
ports can be tested simultaneously if sufficient loopback
plugs are available.
Ethernet LAN
(AT-AR022 ETH PIC only)
Ethernet loopback plug.
The Test Facility software will detect (by looking for traffic)
if the transceiver is connected to a working LAN. If it detects
traffic, the transceiver test will abort.
Basic Rate ISDN BRI loopback plug for testing AT-AR021(S) V2 hardware
revision in NT mode.
The AT-AR021(S) V3 hardware revision and the
AT-AR021(U) PIC do not support the NT mode, so a
loopback plug can not be used. Internal loopback tests can
be run without a loopback plug.
For more complete testing, connect the BRI interface to an
external test device or NT mode device, then execute
conformance loopback tests and generate packets using
the enable bri ctest and disable bri ctest commands
from the Integrated Services Digital Network (ISDN) chapter
of the AlliedWare
®
Operating System Software Reference
for your switch or router.
Primary Rate ISDN PRI loopback plug.
Synchronous An external test device is required. Use a loopback to the
local DCE.