[afnog] MTU Size for transit links for ISPs

[Johan Bernhardsson]

Hello,

In my experience its best that both sides has the same MTU size set.

But i bet that some that is a better network ninja than me knows it
better than me :)

/Johan Bernhardsson



On fre, 2013-09-20 at 07:11 +0000, Perreau, Luc wrote:
> Hi all,
> 
>  
> 
> We have been working with POS interfaces for a while and with no
> issues at all. Our MTU size is always set to 4500.
> 
>  
> 
> However, we have recently installed some Ethernet links with default
> MTU size of 1500. These are STM1 size links and we found that there is
> degraded performance on browsing and download, but P2P torrent traffic
> is not affected.
> 
>  
> 
> What is the best way forward to confirm that it is an MTU issue, and
> if so, what is the best MTU size to set? Jumbo (9000) or mutually
> agreed size with the transit provider?
> 
>  
> 
> Your assistance would be greatly appreciated.
> 
>  
> 
> regards
> 
>  
> 
> Luc Perreau
> 
> 
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