On Mon, May 18, 1998 at 12:36:26AM +0100, Alex Bligh wrote:
Let's not forget to mention the 10,000 dialup customers who have to change their DNS numbers. We have sent snail-mail and e-mail over and over again, yet only about 1/3 of that 10k have actually made the change away from the old numbers. How many of those customers do you think we'll lose when we officially turn off the old ip's?
Keep a /32 route internally for your old DNS server numbers for a couple of years. Your customers will still see it, though noone else will. Of course your entire customer base will possibly lose connectivity to (1/2^32) of the internet - but they'd probably prefer that to losing their nameservers. If you want to be really cunning set the nameservers on the old box to resolve www.yournetworkname.net at a different server, which has a big notice to change their nameservers, plus a downloadable executable to go and do it for them on most operating systems. Presumably you are handing out dynamic DNS by radius in any case, which overrides the built in settings which copes with 95% of users.
-- Alex Bligh GX Networks (formerly Xara Networks)
You may be handing that out NOW (we are). You weren't doing it two or three years ago. We have a significant number of customers from *1993*. There was no such thing as dynamic auto-configuration of DNS at that point in time. If you change those nameservers, you're going to have trouble. Guaranteed. I'll bet that not 10% of the customers with them hard-coded (of which there will be MANY) will make the change *UNTIL* you shut off the old addresses - at which point your NOC will find out what it is like to have a "bad hair" day. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly / All Lines K56Flex/DOV | NEW! Corporate ISDN Prices dropped by up to 50%! Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost