[e2e] 10% packet loss stops TCP flow

[Clark Gaylord]

Donald Hoffman wrote:

>On Fri March 4 2005 8:24 pm, Cannara wrote:
>  
>
>>Riding along on the same link was a similar amount of VPN
>>traffic.  It was largely unaffected by the losses, because it's transported
>>in UDP and has its own recovery processes that work faster than normal TCP.
>>    
>>
>
>This may be a stupid question as I have not worked on commercial VPNs for many 
>years, but what recovery mechanism would the VPN tunnel be using.  Most VPN's 
>I was aware of just encapsulate the traffic in a tunnel and provided no 
>additional error recovery services.    Is this a common feature?
>  
>
But they don't tunnel with TCP and they can have their own 
buffer/retransmission methods.  That's not to say that VPNs aren't 
susceptible to packet loss, but they can add a layer of resiliency to an 
otherwise broken link layer.

--ckg
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