Article ID: 1737, created on Mar 7, 2007, last review on May 8, 2014

  • Applies to:
  • Virtuozzo containers for Windows 4.0
  • Virtuozzo for Windows 3.5.1 SP1


VE loses network connectivity when networking mode switched to bridge mode if the interface being used is a set of teamed adapters in load balancing mode. Packets are never returned to the VE.


In order for network load-balancing (NLB) to work, the physical adapter re-writes every packet’s MAC address with the address of the less-utilized physical adapter. This has been confirmed on both Intel and Broadcom NLB drivers. Because the hardware node does not provide a proxy arp entry for VEs in bridged mode and the destination device’s ARP table is updated with the physical adapter‘s MAC when it receives the packet, the return traffic never arrives at the source VE.


Either turn off the NLB feature of the adapter team or use the host-route mode for the virtual environments.

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