Hi,
We have a HA Setup of Lync, Exchange, SharePoint and CRM. We are using a TMG Array to Publish all these except Lync Edge Traffic.
TMG Array Servers have 2 NICs Each (1 Public 1 Private) and are setup using Edge Firewall Topology.
NLB is setup on TMG for Internal and External interface. Internally it works well, and I am using the Internal VIP as the default GW on all Servers inside the network.
Externally, I'm able to access Exchange and other Services on the Public IPs of each of the TMG Serves but all traffic fails on the VIP Public IP. Just to explain again, Public IPs are directly setup on the Public NICs on the Server with no additional Firewall
in place.
Unless External NLB works, we don't seem to have a complete failover capability when one of the Server goes down, as DNS round robin throws traffic on both Servers and the only the one which is Online works. Ideally, I would like to use multiple VIPs
to Publish everything instead of Server Public IPs, so as to remove the DNS Round Robin from the picture.
I have seen a number of Blogs for External NLB, and even tried Unicast with a 3rd NIC for Array traffic using another Private Range, but neither multicast nor Unicast with Inter-Array NIC seem to work, although NLB Wizard accepts them fine and does not show
any Errors. However, I'm able to log some traffic on the Firewall when I try sending traffic to External NLB IP.
Any help would be appreciated please.
PS: Both Servers are updated to SP2 and latest Roll Up.
Thank You
Favad Q