Managing Stacks › Display Device Links

Display Device Links

If you are unable to get any connections through the TCP/IP network or through a particular interface to the TCP/IP network, you may want to check the device links in an attempt to isolate the cause of the problem.

To display device links

1. Enter DL (Display Device Links) next to a stack on the IP Resource Monitor.

   The TCP/IP Device Links List appears.

Device Links Graphic Display

The TCP/IP : Device Links graphic display is organized in the following layers:

• TCP/IP stack
• Devices
• (IPv4) Links and (IPv6) interfaces

TCP/IP Stack Layer

The first layer represents the TCP/IP software running on this system.

Device Layer

The second layer represents the devices used by TCP/IP to interface to the TCP/IP network. Each box in this layer contains information like the following for a device:

• Device name
• Channel protocol type (for example, LCS, CLAW, or CTC)
• Device status
• Channel address
• Channel path status (ONLINE or OFFLINE)
• An error message if applicable
• Send queue size
• MAC address of the device
• Number of packets received
• Number of packets sent

Note: The information varies, depending on the type of device.

If the error message PATH ERROR or CHP ERROR appears for a device, there is an error in the path or the channel path. To investigate this error, use the operating system command: D M=DEV(devAddress).

If the error message ERROR STATUS appears for a device, there is a configuration error.

Note: To investigate this error, see the installation chapter in the Installation Guide for CA TCPaccess CS.

If the device is running in 3172 offload mode, the word offload appears.

SNA link devices display an LU name.

Link and Interface Layer

The third layer represents the links (IPv4) and interfaces (IPv6) used by a stack to interface to the TCP/IP network. Each box in this layer contains the following details for each link:

• Link name
• Status
• IP address
• Network address
• Network mask
• SubNet address
• SubNet mask
• MTU size
• In Pkts/Hour and Out Pkts/Hour

  Note: This information is available only if network interface monitoring for the stack is set as active in its definition. For more information, see the Implementation Guide.

Display Device Links Graphically

To view a graphic display of the TCP/IP interfaces

1. Press F4 (GrphDisp) at the TCP/IP Device Links List.

   The TCP/IP : Device Links panel appears.

   Note: Alternatively, you can enter DG beside a stack name on the IP Resource Monitor.

Display Device Links Information

To display device links information from Device Links List

1. Enter S (Show Information) next to the device for which you want to display information.

   The device links information appears.

2. Enter S next to a link.

   The Routing Table List appears listing the paths on that link.