[vpn-help] No connect when configured for jumbo frames

[Paul Theodoropoulos]

On 10/25/13, 11:18 AM, Thomas Stokkeland wrote:
> If you are not doing SAN stuff, or very large file transfers within 
> the collision domain - enabling Jumbo is likely to cause a crappier 
> performance than leaving it at the standard 1500MTU - because, the 
> router or receiving device will tell the sender to fragment, your 
> packet will be split in half, this retransmit attempt will happen 
> several times till the MTU is met - then as the "knowledge" of this 
> expires your device will have to do that over and over.. causing a ton 
> of extra traffic on your network.. so, if you don't have a requirement 
> to use large MTU, then turn it off - i suspect there are mechanisms in 
> the vpn software that either ignores large packets (because they are 
> not to be routed) or just can't handle fragmentation at that level
That makes sense - thanks for the explanation. I suffer the "If an 
optional value is bigger, it must therefore be better/faster/more, so I 
need to use it" syndrome.

-- 
Paul Theodoropoulos
www.anastrophe.com

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