Re: anycasting, DNS client retry/failover

2009-03-11 Thread Gordon A. Lang
Andrew JW and...@andrewjw.ca wrote: We run this on Linux using quagga and zebra. The script is a reasonably [...snip...] I'd urge caution on route injection using CSS/CSM, we've had some bad experiences with it (specially the h/a features), ACE is better, but still not perfect. So far the

anycasting, DNS client retry/failover

2009-03-06 Thread Gordon A. Lang
I have just implemented DNS anycasting on our inside network using Cisco content switches to monitor the health of the servers and to advertise an OSPF route when the back-end services are alive. I have three CSS's simultaneously advertising the same service address to the network, and

Re: anycasting, DNS client retry/failover

2009-03-06 Thread Peter Dambier
Hi Gordon, I am running several Bind 9.4.x nameservers inside and outside. Inside I can see my clients, diverse Linuxes, query ns1 and when there does not come an answer within a second, they query ns2 from /etc/resolv.conf. So ns2 will ask the same request ns1 did - but one second later and to