Fail-over

[Norman Zhang]

>>I've a dual WAN router, currently some of my servers are 
>>bound with static IPs to ISP1. I like them to remain 
>>available on ISP2 if ISP1 goes down. Do I need dynDNS service 
>>for this? Or I can type in 2 different IPs for 1 serivce.
>>
>>e.g.,
>>
>>1.2.3.4 IN www.example.com #ISP1
>>2.3.4.5 IN www.example.com #ISP2.
>>
>>But internet may still resolve to 1.2.3.4 despite ISP1 being 
>>down. May I ask what the best way to go about this?
> 
> Probably the best way to do this would be to do BGP to both of the ISPs.
> With BGP, people will be able to get to your servers (with ISP1 IP
> addresses) through ISP2 when ISP1 is down.

Thanks for your suggestion. I can't use BGP. ISP1 and ISP2 are 
competitors. 8( Is there some way of doing this with BIND?

Regards,
Norman Zhang