Connectrix: How to Collect TCP Dump from Switch and San Navigator Simultaneously

Summary: This article explains the steps to collect the TCP dump from San switches and San Navigator to troubleshoot SANnav switch discovery failed issues.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

NOTE: Collect the tcpdump from the SANnav server, and the switch to be discovered while the DISCOVERY process has been initiated.
  1. Collect TCP dump traces from SANnav:
    1. Log in to SANnav CLI as root user.
    2. tcpdump package should be installed on the Linux machine hosting SANnav. If not, the package should be ready to install on the Internet with command:
yum install tcpdump
  1. Start the tcpdump from the server by using the below command:
#tcpdump -i any -w sannavserver.pcap &
  1. Collect TCP dump from San switch:
    1. On the switch, check if the tcpdump package (tcpdump-3.6.2-4.ppc.rpm) exists by logging in as root and checking in /tftpboot/common/oss.
    2. If the tcpdump package (tcpdump-3.6.2-4.ppc.rpm) is found on the switch at /tftpboot/common/oss, it must be installed.
    3. To install the package, log in as root and run the following command to install tcpdump:
rpm --install --nodeps /tftpboot/common/oss/tcpdump-3.6.2-4.ppc.rpm (that is two hyphens for both options)
  1. Check that tcpdump is successfully installed by running the following command. This should return where tcpdump is installed:
which tcpdump
  1. After installing tcpdump on the switch as a root user and remaining logged in as root, run the tcpdump command as follows:
# tcpdump -i any -s 65535 -w /tmp/switch.pcap &
where /tmp is the location where tcpdump output file (switch.pcap) will be stored.
 
NOTE: The location can be changed to a preferred directory if storing the switch.pcap file in /temp is not wanted.
 
  1. While tcpdump is now running on the SANnav server and on the switch, log in to the SANnav Portal UI and try to Discover the switch again.
  2. Wait for 10-15 minutes.
    1. Stop the tcpdump from the SANnav server by pressing Ctrl + C.
    2. Stop tcpdump on the switch by pressing Ctrl+C or running the command:
kill <PID Of tcpdump>
  1. Upload the following data for investigations:
    1. The two tcpdump files generated on SANnav Server and the switch
    2. Wait for a few hours (at least 2-3 hours) before generating SANnav logs and uploading them for investigation.

Affected Products

Connectrix B-Series, Connectrix SANnav
Article Properties
Article Number: 000212840
Article Type: How To
Last Modified: 02 Jul 2025
Version:  4
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