Table 15-1 Command Summary
Command
|
Purpose
|
bert errors
|
Use this command to test link availability by injecting a fixed number of bert errors when a pattern is running and check that the same number of errors were received on the remote end.
|
bert pattern
|
Use the bert pattern command to start or stop a specific bit pattern. To test link availability, start a pattern on one end and put the remote end in network loopback and verify that there are no bert errors.
|
card type (T1-E1)
|
Use this command to change all the SPA ports from T1 or T3 to E1 or E3 (or E3 to T3), you must deselect the card type and then configure the card with the new type of interface
|
card type (T3-E3)
|
Use this command to change all the SPA ports from T3 to E3, you must deselect the card type and then configure the card with the new type of interface.
Once a card type is issued, the user can enter the no card type command and then another card type command to configure a new card type. The user must save the configuration to NVRAM and reboot the router in order for the new configuration to take effect.
When the router comes up, the software comes up with the new card type. Note that the software will reject the configuration associated with the old controller and old interface. The user will now have to configure the new controller and serial interface and save it.
|
framing (T3 controller)
|
Use the framing command to set the framing mode on the T3/E3 port.
|
framing (T3-E3 interface)
|
Use the framing command to set the framing mode on the T3 port.
|
loopback (T3-E3 interface)
|
Use the loopback command to diagnose problems on the local port, between the framer and the line interface unit (LIU) level.
|
mdl
|
Use the mdl command to send msgs in maintenance data link in T3 c-bit framing mode.
|
show controllers serial
|
The output from the show controllers serial command provides error and alarm information that is useful in troubleshooting line problems.
The information displayed is generally useful for diagnostic tasks performed by Cisco Systems technical support personnel only. For the PA-E3 or PA-T3 port adapters, the show controllers serial command also displays configuration information such as the framing, clock source, bandwidth limit, whether scrambling is enabled, the national bit, the international bits, and DSU mode configured on the interface. Also displayed are the performance statistics for the current interval and last 15-minute interval and whether any alarms exist.
|
show interfaces serial
|
Frame Relay
Use this command to determine the status of the Frame Relay link. This display also indicates Layer 2 status if switched virtual circuits (SVCs) are configured.
Channel Groups as Virtual Serial Interfaces
To find out about channel groups configured as virtual serial interfaces, to verify that the router has High-Level Data Link Control (HDLC) encapsulation on the interface, and to verify that the interface sees the loopback, use the show interfaces serial command in privileged EXEC mode.
|
t1 framing
|
If you do not specify the t1 framing command, the default ESF is used.
To return to the default mode, use the no form of this command. This command does not have a no form on the Cisco 7500 series router with the CT3IP.
|
ttb
|
Use the ttb command to attach a header that contains fields to send to a remote device.
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