Cisco Systems PA-4T manual Checking the Configuration

Page 76

Checking the Configuration

Following is an example of a successful ping command to a remote server with the address 10.10.10.10:

Router# ping 10.10.10.10 <Return> Type escape sequence to abort.

Sending 5, 100-byte ICMP Echoes to 10.10.10.10, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms Router#

If the connection fails, verify that you have the correct IP address for the server and that the server is active (powered on), and repeat the ping command.

The loopback test allows you to detect and isolate equipment malfunctions by testing the connection between the PA-4T+ interface and a remote device such as modems or CSU/DSUs. The loopback subcommand sends a series of packets out to and through the device (or cable), and back to the PA-4T+ interface. If the packets complete the loop, the connection is good. If not, you can isolate a fault to the remote device or interface cable in the path of the loopback test.

Note You must configure a clock rate on the port before performing a loopback test. However, if no cable is attached to the port, the port is administratively up, and the port is in loopback mode, you do not have to configure a clock rate on the port before performing a loopback test.

Depending on the mode of the port, issuing the loopback command checks the following path:

•When no interface cable is attached to the PA-4T+ interface, or if a DCE cable is attached to a port that is configured as line protocol up, the loopback command tests the path between the network processing engine and the interface port only (without leaving the network processing engine and port adapter).

•When a DTE cable is attached to the port, the loopback command tests the path between the network processing engine and the near (network processing engine) side of the DSU or modem to test the PA-4T+ interface and interface cable.

For complete descriptions of interface subcommands and the configuration options available for Cisco 7200 series routers, Cisco uBR7200 series, and Cisco 7100 series routers, and VIP2 interfaces, refer to the publications listed in the“Related Documentation” section on page vi.

Note The X.21 interface definition does not include a loopback definition. On the PA-4T+, the X.21 DTE interface does not support the loopback function. Because of the internal clock signal present on the PA-4T+ interfaces, loopback will function on an X.21 DCE interface.

8-22PA-4T+ Synchronous Serial Port Adapter Installation and Configuration

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Contents Corporate Headquarters Copyright 1997-1999 Cisco Systems, Inc All rights reserved Overview Port Adapter OverviewPA-4T Port Adapter-Faceplate View Synchronous Serial Overview Router# show diagSerial Interface Specifications Cables and Pinouts PA-4T+ Receptacles and CablesSerial Port Adapter Cables EIA/TIA-232 Connections EIA/TIA-449 Connections PA-4T+ Port Adapter Cable Pinouts EIA-530 ConnectionsRTS/CTS CTS/RTS DSR/DTR DTR/DSR RTS CTS DSR SD+ Shield ground RTS/CTS CTS/RTS DSR/DTR DTR/DSR DCD/LL Rlsd LL/DCD LEDs LEDs on the PA-4T+-Horizontal OrientationLEDs Preface ObjectivesDocument Organization Related DocumentationCisco Connection Online Documentation CD-ROM Preparing for Installation Tools and Parts RequiredSoftware and Hardware Requirements Router Platform Recommended Minimum Cisco IOS ReleaseSoftware and Hardware Requirements Safety Guidelines Safety WarningsTelephone Wiring Guidelines Electrical Equipment GuidelinesFCC Class B Compliance Preventing Electrostatic Discharge DamageFCC Class B Compliance FCC Class B Compliance Installation Overview VIP2 and the PA-4T+ Port AdapterVIP2-15 or VIP2-40 with a PA-4T+ in Port Adapter Slot Removing a Port Adapter Installing a Port Adapter Location of Port Adapter Screw-Partial Port Adapter ViewAligning a Port Adapter in a Port Adapter Slot H3152 Cisco 7206 with a PA-4T+ Installed Cisco 7200 Series PA-4T+ Port AdapterPort adapter Handle Lever unlocked Position Handling a Port Adapter Placing the Port Adapter Lever in the Locked Position-Cisco Cisco uBR7200 Series and the PA-4T+ Port Adapter Port adapters Port adapters Port adapter lever in unlocked position Inside slot guide PC board Metal carrier Placing the Port Adapter Lever in the Locked Position Installing a Port Adapter Cisco 7100 Series PA-4T+ Port Adapter Cisco 7120 Series Router-Port Adapter Slot 3 LocationCisco 7140 Series Router-Port Adapter Slot 4 Location Installing a Port Adapter Guides Installing the PA-4T+ Interface Cables Attaching PA-4T+ Port Adapter Interface CablesReplacing PA-4T+ Port Adapter Cables Incorrect, cable upside downFor a VIP2, use the following commands Router# copy running-config startup-config Configuring the PA-4T+ Interfaces Using the Exec Command InterpreterCisco 7200 Series and Cisco uBR7200 Series Ports PA-4T+ Interface Port Address Example-Cisco uBR7246 VIP2 Ports PA-4T+ Interface Port Address Example-CiscoShutting Down an Interface Cisco 7100 Series PortsEnter the shutdown command as follows Router# show interfaces serial 1/0 Performing a Basic Configuration Configure additional interfaces as requiredConfiguring Timing Clock Signals Setting the Clock RateInverting the Clock Signal Inverting the Data Signal Configuring Half-Duplex and Binary Synchronous Communications Configuring Half-Duplex Checking the Configuration Using show Commands to Verify the New Interface StatusConfiguring Bisync Using show Commands to Display Interface Information Hardware is M4T Internet address isChecking the Configuration Router# show version VIP2 show interfaces Command Minute output rate 0 bits/sec, 0 packets/sec System image file is image-name, booted via tftp from Using ping and loopback Commands Checking the Configuration
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