IBM Support

Network trace compatibility issues with the Load Balancer for IPv4 and IPv6.

Troubleshooting


Problem

Network trace cannot run concurrently with the Load Balancer for IPv4 and IPv6 unless the load balancer's configuration is modified.

Symptom

The Load Balancer for IPv4 and IPv6 and network trace tools (iptrace or tcpdump) all use the same AIX® resource to capture ARP packets (the ns_tap filter). The filter allows a single resource so the network trace tool and the Load Balancer cannot both function concurrently with the default configuration.

With default settings, when the Load Balancer and a network trace tool are both active, any of these problems can be observed:

  • The trace tool displays the message "no suitable device found".
  • No errors are observed but only broadcast traffic is captured by the trace tool.
  • The Load Balancer does not receive traffic for the defined clusters.

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Document Information

Modified date:
03 March 2025

UID

swg21663741