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Barracuda Load Balancer

How to Troubleshoot Your Barracuda Load Balancer

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The ADVANCED > Troubleshooting page provides various tools that help troubleshoot network connectivity issues that may be impacting the performance of your Barracuda Load Balancer.

From this page you can open a secure troubleshooting connection from your Barracuda Load Balancer to Barracuda Central, allowing a Barracuda Networks technician to diagnose and troubleshoot an issue with your system.

To open a troubleshooting connection to your Barracuda Load Balancer:
  1. Click Establish Connection to Barracuda Support Servers.
  2. Provide the support engineer with the displayed serial number.
  3. After the issue is resolved, click Terminate connection to Barracuda Central to close the connection between your Barracuda Load Balancer and Barracuda Central.

Network Connectivity Tests

You can use the tools in this section to diagnose potential network problems on the Barracuda Load Balancer:

  • Ping Device–An interface to the ping command on the Barracuda Load Balancer. To verify connectivity with any network host, enter the IP address or hostname to ping, and then click Begin Ping.
  • Telnet Device–An interface to the telnet command on the Barracuda Load Balancer. To verify connectivity and initial response from the remote server, enter the IP address or hostname of the remote server, and then click Begin Telnet.

This session is non-interactive.

  • Dig/NS-lookup Device–An interface to the dig command on the Barracuda Load Balancer. To look up any type of DNS record (such as A, MX, SOA, TXT, or NS), enter the IP address or hostname of the device in the Dig/NS-lookup Device field, and then click Begin Dig.
  • TCP Dump–An interface to the TCP dump command on the Barracuda Load Balancer. To monitor network traffic packets, enter the TCP dump command options, and then click Begin TCP Dump.
  • Traceroute Device–An interface to the traceroute command on the Barracuda Load Balancer. To determine the path taken by traffic to its destination, enter the destination and click Begin Traceroute.
  • Wget Web Page–Execute the Wget command with spider option. Enter a URL and click Begin Wget. Wget will not download the pages; it only checks that they are there. Pages are not returned or cached. You can use a host name or an IP address in the URL. Wget supports HTTP, HTTPS, and FTP protocols, as well as retrieval through HTTP proxies.

Advanced TCP Dump

The Advanced TCP Dump option allows you to execute a TCP dump command on the Barracuda Load Balancer and write the results to a file for downloading. The maximum number of packets that can be captured for each run is limited to 10,000. The IP Address and Port fields are optional.

Network Information

These commands are primarily for use by Barracuda Networks Technical Support.

  • Show ARPs–This command displays the ARP (Address Resolution Protocol) entries for this Barracuda Load Balancer. It shows the MAC address and the corresponding IP address of each interface.
  • Show Routes–This command displays the IP routing table on the Barracuda Load Balancer. It shows the network address and subnet information for the LAN and WAN, and the default gateway.
  • Show Interfaces–This command displays the MAC address for each interface used by the Barracuda Load Balancer.
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