Maintained by: NLnet Labs

edns-buffer-size

W.C.A. Wijngaards
Fri Sep 1 16:56:14 CEST 2017


Hi T.Suzuki,

Yes, 1472 is a more precise value to recommend.  Changed the example
config and also the man page.

Best regards, Wouter

On 01/09/17 16:46, T.Suzuki via Unbound-users wrote:
> unbound.conf
> # EDNS reassembly buffer to advertise to UDP peers (the actual buffer
> # is set with msg-buffer-size). 1480 can solve fragmentation (timeouts)
> edns-buffer-size:
> 
> Why does this comment recommend
>  1480 = 1500 - 20 ? (UDP datagram size over IPv4)
> 
> Why is this value not to become
>  1472 = 1500 - 20 - 8 ? (UDP payload size over IPv4)
> 
> Or, Is this a value of another meaning?
> 
> (I verified that the edns-buffer-size is used for udp payload size of EDNS0.)
> 


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