-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/20/2011 12:37 PM, Martin T wrote: > I have seen setups where one domain name has two address records. > First IP address is in the ISP-A network and the other one is in the > ISP-B network. In case I execute "host www.<domainname>.com", I always > get two IP addresses as a reply and they always appear by turns. Am I > correct, that setup like this provides redundancy as well as > load-balancing? Is there some common method in BIND to give out IP > addresses by turns? Last but not least, how do application layer(for > example www, ssh) handle such setup?
The only thing involved is having two A records for the same name. It's not truly load-balancing, but it can do the trick in some circumstances. All applications I've seen ask for and use one IP address. Therefore, SSH will be sometimes connecting to one server and sometimes another. Generally with SSH you care what you're connecting to and will also have individual records for each host to use for that purpose. - -- - ---- _ _ _ _ ___ _ _ _ |Y#| | | |\/| | \ |\ | | |Ryan Novosielski - Sr. Systems Programmer |$&| |__| | | |__/ | \| _| |novos...@umdnj.edu - 973/972.0922 (2-0922) \__/ Univ. of Med. and Dent.|IST/CST-Academic Svcs. - ADMC 450, Newark -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7wyb8ACgkQmb+gadEcsb6BMQCePx4LhLGh3b0XOxv4L5ZjA6bn cMMAoNGPW8t9gkqzsD9pUPQuQITaFips =jL/1 -----END PGP SIGNATURE-----
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