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PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
OL-3526-05
Chapter 4 Configuring Unchannelized mode for the Cisco PA-MC-2T3+
Checking the Configuration
If the ping command to the remote IP address failed, then use loopbacks to troubleshoot the T3
connection using the following steps:
Step 1
Use the
show controller T3
and
show interface serial
commands to confirm that the T3 controller,
serial interface, and line protocol are up.
Step 2
Place the serial interface of the PA-MC-2T3+ in local loopback using the
loop local
command.
Step 3
Repeat the ping command using the IP address of the local serial interface. Using the previous example
where the remote server’s IP address was 10.0.0.10, if the local IP address is 10.0.0.5, then use the
command:
ping 10.0.0.5
If the ping is successful, proceed to Step 4. A failure indicates a configuration problem or a hardware
problem with the PA-MC-2T3+.
Step 4
Remove the local loop with the
no loopback
command and place the remote server or DSU in network
loopback with the
loopback remote
command.
Note
The
loopback remote
command is only available when the framing is set to c-bit parity. If the framing
is not set to c-bit parity, the remote server will have to be placed into network loopback by someone at
the remote site.
Step 5
Repeat Step 3. If the ping is successful then the PA-MC-2T3+ and the T3 link to the remote site is
functioning correctly. The problem is probably in the remote DSU or server configuration or hardware.
If the ping fails then either the T3 link to the remote site or the remote server or DSU configuration or
hardware has a problem.
