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Sounds reasonable. What concerns me is the requirement in the announcement "To reach www.msu.edu users may need to reboot their PC, and clear their DNS cache". Perhaps this is another case of poor wording choice? -- +-------------------------------------------+ | Michael Surato | | College of Arts and Letters | | Michigan State University | | 320 Linton Hall | | East Lansing, MI 48824 | | Voice: (517) 353-0778 Fax: (517) 355-0159 | +-------------------------------------------+ >>> On 4/24/2009 at 8:31 AM, Troy Murray <[log in to unmask]> wrote: > I recently did something very similiar for an external client. A few days in > advance I changed the DNS records Time To Live (TTL) value to expire those > DNS cached records after 5 minutes. So, after the change over, external > clients (WWW, SMTP, etc) would at most ben 5 minutes before finding the > servers at their new IP addresses. > > I think this answers your question, at least how I understand it. > > -- > Troy Murray > Informatics Specialist > Michigan State University > Biomedical Research & Informatics Center (BRIC) > 100 Conrad Hall > East Lansing, MI 48824 > Phone: 517-432-4248 > Fax: 517-353-9420 > E-mail: [log in to unmask] > > ________________________________ > > From: MSU Network Administrators Group on behalf of Michael Surato > Sent: Fri 4/24/2009 8:29 AM > To: [log in to unmask] > Subject: [MSUNAG] Fwd: [SERVICESTATGEN] MAIL.MSU.EDU Scheduled Maintenance > Open: Load Balancer Upgraded - www.msu.edu > > > > Perhaps I have been misinformed. If so, could someone please correct my > understanding. > > My understanding is that DNS servers caches responses from authoritative DNS > servers for approximately two days. If this is so then users external to the > university who's DNS servers have cached the old IP address will be sent to > the old IP address for up to two days after this change. If you plan on > immediately dropping the old IP address, as it appears in this message that > you are doing, then for up to two days www.msu.edu would cease to exist for > these users for that period of time. Somehow I do not find this to be > acceptable. As I am not intimately familiar with load balancers could someone > please help me understand how this process could be mitigated? > > Thank you very much! > -- > > +-------------------------------------------+ > | Michael Surato | > | College of Arts and Letters | > | Michigan State University | > | 320 Linton Hall | > | East Lansing, MI 48824 | > | Voice: (517) 353-0778 Fax: (517) 355-0159 | > +-------------------------------------------+ > >>>> On 4/23/2009 at 4:32 PM, MSU ATS Help Desk <[log in to unmask]> wrote: >> Service: MAIL.MSU.EDU >> Type: Scheduled Maintenance >> Title: Load Balancer Upgraded - www.msu.edu >> Status: Open >> Approximate Start Time: 5/13/2009 6:00:00 AM >> Approximate End Time: 5/13/2009 7:45:00 AM >> >> Comments: www.msu.edu will be moved behind a new load balancer and will have >> a new IP address after this change. To reach www.msu.edu users may need to >> reboot their PC, and clear their DNS cache. >> >> *********** >> >> Status updates on this and other campus technology services can be found at >> http://servicestatus.msu.edu <http://servicestatus.msu.edu/> >> >> >> You can remove yourself from the mailing list by sending a mail message to >> [log in to unmask] with the following command in the first line of the text >> of your message. >> >> SIGNOFF SERVICESTATGEN >> >> You will receive confirmation of your request via email.