Справочник Пользователя для 3com SuperStack II
142
A
PPENDIX
A: T
ROUBLESHOOTING
5 Reenable the WAN port by entering:
SETDefault !3 -PATH CONTrol = Enable
Failure to perform this step causes the port to remain in loopback mode
preventing connectivity through the port. Performing diagnostics on the
port will reveal only that the port is down.
preventing connectivity through the port. Performing diagnostics on the
port will reveal only that the port is down.
Performing a Remote
Loopback for V.54 on
a T1/FT1 Port
To perform a remote loopback test for V.54 on a T1/FT1 port, you must
first connect two SuperStack II NETBuilder SI bridge/routers, or connect
your bridge/router to a remote device that supports V.54 signal detection.
first connect two SuperStack II NETBuilder SI bridge/routers, or connect
your bridge/router to a remote device that supports V.54 signal detection.
To perform the remote loopbacktest for V.54, follow these steps:
1 Disable the WAN path by entering
SETDefault !3 -PATH CONTrol = Disable
2 Enable V.54 signal detection by entering:
LPBCK !3 -PATH V54LpbckYes
3 Start the loopback test by entering:
LPBCK !3 -PATH V54LpbckSTART
4 Stop the loopback test by entering:
LPBCK !3 -PATH V54LpbckSTOP
Performing a Remote
ATT Loopback Test on
the T1/FT1 Port
This section describes how to perform a remote loopback test for ATT on
a T1/FT1 port. Connect your bridge/router to a remote device that
supports ATT.
a T1/FT1 port. Connect your bridge/router to a remote device that
supports ATT.
To perform the remote loopback test for ATT, follow these steps:
1 Disable the WAN path by entering:
SETDefault !3 -PATH CONTrol = Disable
2 Start the loopback test by entering:
LPBCK !3 -PATH RmATTLnLpbckSTART
(for a line loopback test)
or
LPBCK !3 -PATH RmATTPyldLpbckSTART
(for a payload loopback test)
LPBCK !3 -PATH V54LpbckSTART
3 To stop the loopback test, enter:
LPBCK !3 -PATH RmATTLnLpbckSTOP
(for a line loopback test)
or
LPBCK !3 -PATH RmATTPyldLpbckSTOP
(for a payload loopback test)