Article ID: 113053, created on Dec 26, 2011, last review on May 9, 2014

  • Applies to:
  • Virtuozzo containers for Windows 4.6

Symptoms

Containers with bridged network adapter cannot be accessed from containers with host-routed NIC on the same hardware node.

Cause

Checksum of IP packet is not recalculated. It was made by design for increasing performance with external hosts.

Resolution

Disable checksumming:
 
    --tcptx_chksum off - Specifies whether the TCP transmit checksum offload is allowed for the Container network interface.
    --tcprx_chksum off - Specifies whether the TCP receive checksum offload is allowed for the Container network interface.
    --iptx_chksum off - Specifies whether the IP transmit checksum offload is allowed for the Container network interface.
    --iprx_chksum off - Specifies whether the IP receive checksum offload is allowed for the Container network interface.
    --udptx_chksum off - Specifies whether the UDP transmit checksum offload is allowed for the Container network interface.
    --udprx_chksum off - Specifies whether the UDP receive checksum offload is allowed for the Container network interface. 

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