Hello, I have TMG Array(NLB) with 4 servers, I try configure ISP Redundancy(load balancing): add second network adapter for my vitrual servers, configure using article http://www.isaserver.org/tutorials/Exploring-ISP-Redundancy-Forefront-Threat-Management-Gateway-TMG-2010.html but my balance is not an array or a general or throwing packets at random. Perhaps the problem in the routing table Windows 2008 R2. On all servers in the table are two routes
0.0.0.0 0.0.0.0 IP_ISP1 metric 2
0.0.0.0 0.0.0.0 IP_ISP2 metric 3
Help please, why does not work balancing?

• Edited by inevg Wednesday, February 27, 2013 11:36 AM

Hi,

Thank you for the post.

As far as I know, ISP-R in connection with NLB on TMG is not working for several reasons:

- NLB integration is not aware of the concept of multiple NIC's per NLB cluster

- ISP-R is targeted for outbound scenarios mainly and not for providing Enterprise level fault tolerance for inbound traffic (the customer shall use proper hardware for this)

Regards,

Your answer only applies to published applications? I have not balanced outbound. The first thing that was noticed that the tracert to both ISPs DNS servers, the trace goes through one provider. It turned out that RRAS not see the network card 2 provider in accordance with Article http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/8cf4b67e-6d5a-4e6d-9ba3-4ef86dacbe33/ (my way HKLM\system...) I added second provider to RRAS, restart the servers TMG - tracing walks normally, but balancing does not work. I tried to recreate the ISP-R - does not work. Noticed a peculiarity: the traffic is routed to the provider whose route is added first, and is independent of the metric. As an alternative, of course you can use the configuration: 2 servers on one provider, 2 servers on second provider, but then did not work published. Why are my settings TMG balancing not vliyut on traffic?

Hi,

Thank you for the update.

Your answer only applies to published applications? I have not balanced outbound. - ISP Redundancy is used to balance outbound traffic between two links. NLB is used to load balance inbound traffic across the TMG array. And for configure ISP-R, you may read the following articles:

http://blogs.technet.com/b/isablog/archive/2009/02/16/keeping-high-availability-with-forefront-tmg-s-isp-redundancy-feature.aspx

http://blogs.technet.com/b/isablog/archive/2009/10/14/the-isp-redundancy-feature-of-forefront-tmg.aspx

Regards,

At the same time balancing (with NLB) the internal traffic and external balancing (with ISP-R) work? I checked the link, my configuration is the same, but the balance is not working. I think that TMG does not participate in the balance and my balance is handled by the Windows 2008 R2. How do I get TMG balance?

Hi,

You can configure ISP-R with load balance mode.

Regards,

I found the solution to my problem http://i-evgeny.blogspot.ru/2013/12/isp-redundancy-does-not-work-on-tmg.html