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

C
CPropAsked:
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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?
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gheistCommented:
Do you have AS number?
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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
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gheistCommented:
cbs.net ?
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CPropAuthor Commented:
No we do not have an AS number.

C
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gheistCommented:
Make a web server and a dns server in each subnet, rest you can learn by doing.
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frankhelkCommented:
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:

Split:
-- 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.

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