Forums > General Discussion > Two sites with windows hosts failover routing.
dnewstat
35 posts
13 Sep 2011 at 7:22 p.m. UTC

I have an issue that maybe someone can point me in the right direction.

I have two locations with internet access.
Both have Juniper SRX210H firewalls.
Both have Cisco 3825 routers for my MPLS network.
Each location has one Windows host.

Now, when packets come into the Junipers from the outside,
I would like to know if there is a way for the Cisco's to check availability
of the Windows host on the local subnet.
If that host is not available, redirect the packets to the other host IP address.

I looked into SLA tracking, and have used it to inject and remove routes. But I am not sure if this is what needs to be in place for an individual host.

Does anyone have any suggestions? Maybe a route map with a match IP ?

Thanks
crazy
2 posts
13 Sep 2011 at 7:46 p.m. UTC

The more efficent way to accomplish this is with DNS. I would suggest a global loadbalancer or a local loadbalancer with some custom scripting provided that feature is available.
dnewstat
35 posts
13 Sep 2011 at 8:04 p.m. UTC

Interesting. Do you have a suggestions of a local load balancer? I'm using Microsoft DNS internally. Manually changing the IP address in DNS isn't feasable. I'm also using Local Area Mobility for DR but not in this case.

Externally I'm covered for failover with BGP peering so that externally, only the one IP address is visable between the two locations.
dnewstat
35 posts
13 Sep 2011 at 8:11 p.m. UTC

thinking about it, a local load balancer won't work since the two internet points are not in the same location. I can't tie them into one load balancer.
crazy
2 posts
15 Sep 2011 at 12:43 a.m. UTC

I have deployed in my network F5 Networks LTMs and GTMs. These appliances will do what you are lookign for. Cisco also has products that compete.

anyway hope that helps. it's good techonolgy to have implemented and working.

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