Diagnosing network corruption
Some network card models require firmware upgrades from the vendor to work reliably under load, or when certain optimizations are turned on. If you are seeing corrupted traffic to VMs, then you should first try to obtain the latest recommended firmware from your vendor and apply a BIOS update.
If the problem still persists, then you can use the CLI to disable receive / transmit offload optimizations on the physical interface.
Warning:
Disabling receive / transmit offload optimizations can result in a performance loss and / or increased CPU usage.
First, determine the UUID of the physical interface. You can filter on the device field as follows:
xe
Next, set the following parameter on the PIF to disable TX offload:
xe
Finally,
Recovering from a bad network configuration
In some cases it is possible to render networking unusable by creating an incorrect configuration. This is particularly true when attempting to make network configuration changes on a member XenServer host.
If a loss of networking occurs, the following notes may be useful in recovering and regaining network connectivity:
•Citrix recommends that you ensure networking configuration is set up correctly before creating a resource pool, as it is usually easier to recover from a bad configuration in a
•You can run the
•The
•When the xapi service starts, it applies configurations to the primary management interface first. The name of the primary management interface is saved in
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