Re: Handling Site Outages

Do you have a fall-back web site - and if so, how do you handle the DNS
switching involved? 

You're assuming you have DNS changes to make. The other option is to use
the same IPs at the remote location and use BGP to announce the change
in route to your network to the internet. Think of it this way:

Customer -> ISP1 -> ISP2 -> ISP3 -> ISP4 -> YourOffice

If there's a site failure you tell ISP4 to send your traffic to
YourOtherOffice

Customer -> ISP1 -> ISP2 -> ISP3 -> ISP4 -> YourOtherOffice

Same IP and you're all set. Now, through BGP you can send this
notification up the chain so it's actually.

Customer -> ISP1 -> ISP2 -> ISP10 -> ISP22 -> YourOtherOffice

Of course this isn't something you're likely to do unless you really
need it, and have the infrastructure to handle it.

-Walden