nanog mailing list archives
Re: dns based loadbalancing/failover
From: Paul Vixie <vixie () vix com>
Date: 07 Oct 2001 10:01:12 -0700
The way to go about this is to see if breaking existing practice will break current implementations and plausible future implementations.
Allow me to apologize, once again, to Microsoft. In the NT 3.5.1 resource kit they shipped a DNS server which had to do its zone transfers one record per message since "existing practice" and "current implementations" meant BIND4 which knew no other way. Fortunately we didn't write a BCP describing BIND4's deviant behaviour, but rather, fixed it in BIND8 and beyond.
If that's not the case, though, consider that a correct implementation of DNS would be within its rights to take note of the "same serial number but incoherent answers" condition and declare the zone unreachable. I'm notWould be pretty silly, and overstepping the robustness principle.
Whether behaviour is robust enough to be called a BCP or not is fodder for a detailed analysis amongst people who *want* to study and debate such things. That mailing list, for DNS, is called namedroppers () ops ietf org. (Not NANOG.)
So by your logic, by making sure that the serial numbers never match, we would 'unbreak' the situation? Seems like a step in the wrong direction.
There is, simply is and we're not going to argue about it, an identity mapping between a zone's contents and a zone's serial number. If you don't like that then you should find a way to change it. Which direction is "wrong" is better discussed on namedroppers () ops ietf org than here.
Current thread:
- Re: dns based loadbalancing/failover, (continued)
- Re: dns based loadbalancing/failover Fletcher E Kittredge (Oct 07)
- Re: dns based loadbalancing/failover Robert E. Seastrom (Oct 06)
- Re: dns based loadbalancing/failover Valdis . Kletnieks (Oct 06)
- RE: dns based loadbalancing/failover Vivien M. (Oct 06)
- Re: dns based loadbalancing/failover Christopher A. Woodfield (Oct 07)
- Re: dns based loadbalancing/failover Patrick Greenwell (Oct 06)
- Re: dns based loadbalancing/failover Paul A Vixie (Oct 06)
- Re: dns based loadbalancing/failover bert hubert (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover bert hubert (Oct 07)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 07)
- Re: dns based loadbalancing/failover Randy Bush (Oct 07)
- Re: dns based loadbalancing/failover Patrick Greenwell (Oct 07)
- Re: dns based loadbalancing/failover Peter van Dijk (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover Stefan Arentz (Oct 06)
- brainstorms (Re: dns based loadbalancing/failover) E.B. Dreger (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover Adam McKenna (Oct 07)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 07)
- Re: dns based loadbalancing/failover David Howe (Oct 07)