Hello, You Can't if you use dual entries like that, the DNS will round robin the request into 50-50% chance that a same name will resolve to A's and B's IP. However, You could use one box with win2k or linux or unix using alias feature. So in this case if you're using double dns entries, you'll get 1/2 probably success attempt if one of the link gone broke. Thanks Regards, Leonard Ong, ST, CCNP R&S Voice, CCDP R&S, CSE, SAIR&GNU LCP, MCP, BCP PT. Internusa Data Digitalindo -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Nurarif Wibawa Sent: Wednesday, September 06, 2000 3:38 PM To: [EMAIL PROTECTED] Subject: dns Hi, I need a solution for the configuration below: Internet | | | | ISP A ISP B | | | | Customer | ---------------------------- Web Server Web Server will has 2 IP addresses, one will be given by ISP A and the other one will be given by ISP B. Primary DNS server is on ISP A and secondary DNS server is on ISP B. The DNS server on ISP A has two records for customer's web server, for example : www a 10.0.0.1 (IP address given by ISP A) www a 20.0.0.1 (IP address given by ISP B) The goal is to use dual ISP for back-up purpose, so the web server will serve for 24 hour / day. Since the DNS server only load balance between two same host records, how about if one link is broken ? For example : Link from ISP B to Customer is broken, meanwhile someone in Internet is accessing the web server and the DNS server give him the IP address of 20.0.0.1, so the session will time out. He will has an access to web server until the DNS server give him the IP address of 10.0.0.1 (because the DNS server load balance these two records). Are there any solutions to solve this problem, so the DNS server could detect the unreachable IP address and after that it would give the correct reachable IP address to the client ? Thank you ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
