Knowledge base : Knowledge Base > XRA-31

By default the XRA-31 system will use DHCP to get its management IP. In some lab-environments this is not wanted. This page explains you how you can configure a fixed IP on the management interface.

All this configuration is done by using the Wicd tool on the system.

Start the Wicd graphical UI from either the main menu

or via the network configuration icon on the bottom right on your screen

The main status and configuration window will open.
Click on "Properties" to change the configuration of the wired connection:

Select "Use Static IPs"
Configure the IPv4 address, netmask and gateway.

Configure DNS settings:

  • DNS domain: your domain name
  • (optional) Search domain: domains to search in when looking for a host name
  • DNS server: One or more DNS servers

Press "OK" to save the changes.

Disconnect + re-connect to apply the changes immediately.
Please note that existing network connections will be closed.

The connection will be established now with the new configuration:

Known issue

Up to XRA-31 version 3.1, there is a bug in Wicd Network Manager that causes connection problems for a static IP address (leading to "Not connected" status after clicking "Connect").

As a temporary workaround, please configure the static IP address settings as detailed above and perform the following additional steps after each system reboot.

  1. Close the Wicd Network Manager. Right click on the network configuration icon on the bottom right on your screen and click Quit.
  2. From the main menu, open a command line (LXTerminal) and execute   wicd-cli --wired -c
  3. Run the command  ip address show  to verify the network settings have been successfully applied.

A permanent patch will be included in XRA-31 version 4.0 and higher to make these steps unnecessary.

There are three methods to obtain the management IP address of an XRA-31 system: Either using the graphical UI of Wicd, using wicd-cli or using the ip command line tool.

Are you looking to configure a fixed IP address or change the network configuration? Please take a look at this page.

Log in to you system

Using screen and keyboard, you can log in at the graphical desktop.

See also How to: Log in at the XRA-31 system for more details.

Check management IP address

Using the Wicd graphical UI

At the bottom right on the screen, you can find the network connections icon.
When hovering, the current connection IP address is shown.

For more details, you can click on the icon.
This will pop up the Wicd Network Manager.



Using the Wicd command line

From the main menu, open a command line (LXTerminal)

Use the ip command to obtain the current IPv4 and IPv6 addresses

wicd-cli --status

You can find all assigned IP addresses in the output

Using the IP command line

From the main menu, open a command line (LXTerminal)

Use the ip command to obtain the current IPv4 and IPv6 addresses

ip address show

You can find all assigned IP addresses in the output

Packets are stored by the XRA-31 in a pcap capture file in the order as they are processed by the (parallel) demodulators.

Due to processing delays, and due to timing differences between upstream and downstream channels, this results in a pcap file where packets are potentially stored out-of-order.
However, the absolute timestamps of the packets are correct (and they based on the PLC epoch timestamps for reference OFDM or on the local system time for reference SC-QAM).

The following two methods can be used to re-order the packets, such that they appear in-order in the pcap file.

Re-ordering in Wireshark®

Clicking on the "Time" column in Wireshark® will sort the packets based on the timestamp in the packets.

Drawback of this method is that when closing the file, and re-opening it, the packets will again be out-of-order.

Re-ordering with reordercap

reordercap is a tool in the Wireshark® suite, designed to reorder pcap files based on timestamp:
Syntax is:

reordercap <inputfile> <outputfile>

Depending on the size of the file, this might take a while.

We to help you!