Commands to prepair the Extended Ping Test

2009-10-14T01:36:00.000-07:00

Steps to prepare for the extended ping test:

Insert the plug into the port in question.
Use the write memory command to save your router configuration. For example:
```
bru-nas-03#write memory
   Building configuration... [OK]
```
To run the loopback test on channelized E1s (PRI or CAS) we need to use the channel-group E1 controller command to create one or more serial interfaces mapped to a set of timeslots in the channelized E1. If the E1 is configured as a PRI you need to remove the pri-group before using the channel-group command. If you are not using a channelized E1, proceed to step 4.
```
bru-nas-02#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
bru-nas-02(config)#controller e1 0
bru-nas-02(config-controller)#no pri-group timeslots 1-31
bru-nas-02(config-controller)#channel-group 0 timeslots 1-31
```
Note: This creates a single Serial0:0 interface (where the first 0 stands for the controller and the second 0 represents the channel-group number) using all 31 timeslots for an aggregate of 1.984Mbps.
Set the encapsulation for interface serial 0:0 to High-Level Data Link Control (HDLC) in interface configuration mode. For example:
```
bru-nas-03(config)#interface serial 0:0
bru-nas-03(config-if)#encapsulation HDLC
bru-nas-03(config-if)#^Z
```
Use the show running config command to see if the interface has a unique IP address. If the serial interface above does not have an IP address, obtain a unique address and assign it to the interface with a subnet mask of 255.255.255.0. For example:
```
bru-nas-03(config-if)#ip address 172.22.53.1
```

Clear the interface counters using the clear counters command. For example:

bru-nas-03#clear counters 
Clear "show interface" counters on all interfaces [confirm]
bru-nas-03#

Perform the extended ping test as described in the extended ping test section.

Hard Plug Loopback Tests for E1 Lines

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The hardware loopback plug test is used to see if the router has any faults. If a router passes a hardware loopback plug test, then the problem exists elsewhere on the line.

Creating the Loopback Plug for E1 on RJ-45

Complete the following steps to create a loopback plug for E1:

Use wire cutters to cut a working cable that is 5 inches long with a connector attached.

Strip the wires.

Twist the wires from pins 1 and 4 together.

Twist the wires from pins 2 and 5 together.

Leave the other wires alone

Creating the Loopback Plug for E1 on DB-15

Complete the following steps to create a loopback plug for E1 on DB-15:

Use wire cutters to cut a working DB-15 cable that is 5 inches long with a connector attached.
Strip the wires.
Twist the wires from pins 2 and 15 together.
Twist the wires from pins 9 and 8 together.
Leave the other wires alone.

Computer Networking

Commands to prepair the Extended Ping Test

Hard Plug Loopback Tests for E1 Lines

Creating the Loopback Plug for E1 on DB-15