-----Original Message----- From: Alan Clegg <[email protected]> Date: Tuesday, October 22, 2013 7:44 AM To: "[email protected]" <[email protected]> Subject: Re: Performance Tuning RHEL 5 and Bind
>On Oct 21, 2013, at 9:47 AM, [email protected] wrote: > >>> From: Alan Clegg <[email protected]> >> >>> Fix your windows clients. >> >> You can't fix stupid. > >I have lots of windows clients and they don't exhibit this "feature". >There's something wrong on the windows clients and it's not the norm. > >To be honest, recent windows releases do a pretty fine job with DNS. Agreed. The problem here is the TCP fall-back vs BIND/OS tuning. I've got a lot of Windows clients (mostly vmware related infra) that don't query via TCP. I would focus on a deeper inspection of the environment including network layer. The OP needs to figure out why the queries are using TCP. Speculating based on the available data, I'm wondering if the new BIND servers were stood up behind a firewall...possibly with broken protocol inspection/fixup type configuration limiting UDP packet size to 512 bytes...and zone data with large NS/whatever RR sets resulting in TCP retries. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/bind-users
