that's if you use "bind" , other nameservers will react differently. Carlos -----Original Message----- From: Leonard Ong <[EMAIL PROTECTED]> To: Nurarif Wibawa <[EMAIL PROTECTED]>; [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: Thursday, September 07, 2000 10:29 AM Subject: RE: dns >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] > ___________________________________ 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]
