EDNS maximum outbound payload size - configurable?

[Jeremy C. Reed]

On Fri, 1 Aug 2008, Vasiliy Baranov wrote:

> In BIND, is there an "additional local" limit on the payload size of 
> EDNS responses the server can send? Is it configurable? edns-udp-size 
> sets the advertised buffer size for responses going TO the server. Is it 
> also used as the limit on responses going FROM the server (in addition 
> to the limit advertised by the client)?
> 
> In other words, if my authoritative nameserver is behind a device that 
> drops outgoing fragmented packets, can I configure BIND to not send EDNS 
> responses that would require fragmentation?
> 
> BIND 9.3.5-P1, if that matters.