Network connection gets slow and irresponsive on the guest OS after a while

[gu99roax]

On a freshly booted virtual machine, the network connection on the guest OS is normal. But after letting e.g. a bittorrent client be active for a while, the internet connection gets very slow to respond for all applications in the guest OS. For example loading google.com or any other website in a web browser takes a long time, anti-virus software reports update problems. The speed of the data transfers on bittorrent client don't seem to be affected considerably but it occasionally loses connection with the trackers so it seems to be struggling as well. Responses to the ping command however, seem to be unaffected by this condition. It can also be worth noting that the bittorrent client is throttled so that it never uses the full bandwidth of the internet connection. It communicates with both the tcp and the udp protocols.

This is a non-issue on the host machine as well as other computers on the network sharing this internet connection (100Mbit fiberLAN). The sluggishness also affect accessing other machines on the local network (e.g. loading router admin page, accessing web pages on other computers on the local area network ...)

What is conspicuous is that the connection continues to sluggish and irresponsive even after the bittorrent client is shut down. The only way to recover the connection is to restart the virtual machine.

This issue occurs when using a NAT network connection as well as when using a Bridged Adapter as a network connection for the guest OS. The motherboard on the host computer has two network adapters so when I use a bridged adapter for the virtual machines I link it to one of them (rge1) which is separate from the network adapter used in the host OS (rge0).

[gu99roax]

This log is for running Win XP x64 as a guest OS in OpenSolaris using NAT for network connection.

[gu99roax]

This log is for running Win XP x64 as a guest in OpenSolaris using Bridged Adapter for network