colinux-users

[coLinux-users] TAP performance issues?

[Conan F. <con...@sh...>]

I've noticed that when the TAP-32 driver that colinux comes with is 
installed, after a couple days of uptime I start to experience terribly 
degraded network performance.  On www.broadbandreports.com/stest , I get 
around 220 kbps down/128 kbps up.  When I uninstall the TAP driver, I 
get around 2000 kbps down/ 512 kbps up.  I'm on a cable modem with a 
theoretical maximum of 10 Mbps down/768 kbps up.  Anyone else 
experienced this issue?  Unfortunately it makes it impossible for me to 
use the networking capabilities of colinux.

I'm on Windows XP, Professional.  I had the problem with SP1, SP1 with 
the Windows XP Advanced Networking pack installed, and with SP2.  Have 
not tested it in any other configurations.  Network card is described as 
a Realtek RTL8139/810X Family PCI Fast Ethernet NIC.  I experience the 
problem regardless of if Colinux is running or not, and regardless of if 
the network is setup using native bridging, or with Internet Connection 
Sharing.

[coLinux-users] Re: TAP performance issues?

[Martin K. <ka...@po...>]

Hi,

it could be true that your connection is slowed down, but not that you 
can't use colinux's networking feature :-)
You can still use M$ Loopback driver and use pcap to connect to this 
connection. PCap is slower than TAP, but it works. It shouldn't slow 
down your connection. The question is how would you like to route this 
connection, if you need that.
My connection setup is one Loopback for communication with host and one 
real NIC for lan/internet. it works perfectly. For local X Win I use 
TAP, but you probably won't.

Regards,
Martin

Conan Ford wrote:
> I've noticed that when the TAP-32 driver that colinux comes with is 
> installed, after a couple days of uptime I start to experience terribly 
> degraded network performance.  On www.broadbandreports.com/stest , I get 
> around 220 kbps down/128 kbps up.  When I uninstall the TAP driver, I 
> get around 2000 kbps down/ 512 kbps up.  I'm on a cable modem with a 
> theoretical maximum of 10 Mbps down/768 kbps up.  Anyone else 
> experienced this issue?  Unfortunately it makes it impossible for me to 
> use the networking capabilities of colinux.

[coLinux-users] Re: TAP performance issues?

[Ian A. <ia...@ab...>]

On 16/09/2004 05:55, Conan Ford wrote:
> I've noticed that when the TAP-32 driver that colinux comes with is 
> installed, after a couple days of uptime I start to experience terribly 
> degraded network performance.  On www.broadbandreports.com/stest , I get 
> around 220 kbps down/128 kbps up.  When I uninstall the TAP driver, I 
> get around 2000 kbps down/ 512 kbps up.  I'm on a cable modem with a 
> theoretical maximum of 10 Mbps down/768 kbps up.  Anyone else 
> experienced this issue?  Unfortunately it makes it impossible for me to 
> use the networking capabilities of colinux.

I have noticed temporary problems browsing the Windows LAN from 
Windows and other general use of the Ethernet card while the TAP 
device is enabled.  When it happens to me, the TAP is disconnected, 
but that might be coicidence, as I've never had it connected very 
long so far.

This doesn't help solve your problem, but to make life easy, I 
suggest disabling the TAP device in Device Manager when not needed, 
instead of uninstalling it.