High Availibility (HA) Web Portal

Hello we have a network topology designed to eliminate single point of failures at most places in our layer 2 and 3 design.
We also have two DIA internet circuits (different ISP)designed to fail-over from primary link to secondary link if we have issue with one firewall or ISP circuit. The monitoring is done via ping between firewalls and next hops of each ISP.
This works  well except when we have an issue with our primary ISP (lets call it ISP1) when connection is not down, but provider is having performance issues with negatively impacts the Web Portal access from external customers.
This Web portal has an IP address with ISP1.
What would be the best solution to having a secondary IP address from ISP2 also be able to respond to Web traffic from Internet to Web portal on our DMZ?

Thank you

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

David Johnson, CD, MVPOwnerCommented:
Instead of using ping to determine availability you'd have to use another methodology that measures the actual response time of a test page and adjust accordingly.. are you already load balancing from isp's? i.e. ww1 coming from 1 isp and ww2 coming from another isp?
Do you have AS number?
Shalom CarmelCTOCommented:
The best way is to use a 3rd party service to monitor your portal performance from the OUTSIDE, and adjust the IP address based on availability and/or performance.

The easiest method will be to move your domain to a DNS service like NSOne that has latency based IP resolution. Here is a short list of DNS vendors who can resolve DNS records based on availability or performance.  
* NSone - internal monitoring as well as support for external data feeds
* Dyn
* Route 53
* UltraDNS

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Check Out How Miercom Evaluates Wi-Fi Security!

It's not just about Wi-Fi connectivity anymore. A wireless security breach can cost your business large amounts of time, trouble, and expense. Plus, hear first-hand from Miercom on how WatchGuard's Wi-Fi security stacks up against the competition plus a LIVE demo!

cbs.net ?
CPropAuthor Commented:
No we do not have an AS number.

Make a web server and a dns server in each subnet, rest you can learn by doing.
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

-- shalomc (https:#a40866686)
-- David Johnson CD MVP (https:#a40866195)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

Experts-Exchange Cleanup Volunteer
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Network Architecture

From novice to tech pro — start learning today.