Mark Andrews wrote: > In message <12831c89-2438-4a84-b81f-14a2ed000...@menandmice.com>, Chris > Buxton > writes: >> On Dec 27, 2009, at 7:16 AM, Rick Dicaire wrote: >>> On Sun, Dec 27, 2009 at 3:16 AM, Ryan S <ryan332...@hotmail.com> wrote: >>>> Some web browers and applications will fail in a round-robin A record >>>> configuration such that if the first A record returned is unavailable, the >> n >>>> the browser will not bring up the page. >>> So fix the application instead of bending the protocol to suit a >>> broken applications need? >>> Specifically, what web browsers and applications are you referring to? >>> On what OS's? >> All web browsers, pretty much. Round robin does not provide failover except f >> or protocols and applications that specifically make it work, such as the DNS >> and SMTP protocols (only between servers, in each case). >> >> Using DDNS to remove unresponsive or overloaded web servers from the rrset wo >> rks OK in situations where solutions at the HTTP and routing layers are not a >> ppropriate, such as web servers in different physical locations; there are ap >> pliance vendors out there offering such solutions. This is also similar to on >> e part of the Akamai solution for global traffic management. >> >> However, this strategy should be avoided when possible, and buffered with hig >> hly available solutions at each point to minimize the use. >> >> Chris Buxton >> Professional Services >> Men & Mice > > Applications that fail to try multiple address are broken. RFC 1123 > said as much back in October 1989 (over twenty years ago now). With > IPv6 coming along almost every host will be multihomed and if a > application doesn't cope then you should report it to the vendor now.
While I agree with you in principal, this is almost universally ignored by just about every internet application that I've ever used including every one of the web browsers I use. Danny _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
