NLB across subnets aza2004 <aza2004.3kke3d[ at ]DoNotSpam.com> 12/17/2008 1:00:05 PM Ok so here is my dilema. I have two terminal servers on different subnets (different locations). I want to use NLB to load balance traffic and for fail over, applying updates ect. Now the two subnets are connected with two wan switches using static routes. Here is what I set up Terminal Server 1: NIC 1 Host IP address: 172.16.8.9 /21 Gateway: 172.16.15.254 DNS:172.16.16.1/172.16.16.2 NIC 2 Host IP address: 172.16.8.10 /21 Cluster IP address: 172.16.8.15 /21 NLB Mode: Unicast Port Rule: all opened Name resolution: Termserver.domain.com Priority:1 TCP/IP advanced Additional IP: 172.16.8.15 Terminal server 2 NIC 1 Host IP address: 172.16.16.9 /21 Gateway: 172.16.23.254 DNS:172.16.16.1/172.16.16.2 NIC 2 Host IP address: 172.16.16.10 /21 Cluster IP address: 172.16.8.15 /21 NLB Mode: Unicast Port Rule: all opened Name resolution: Termserver.domain.com Priority: 2 TCP/IP advanced Additional IP: 172.16.8.15 Now terminal server one appears fine but server two has no network connectivity outside of its subnet. I tried adding an addition cluster IP 172.16.16.15 /21 assigned this as the cluster ip for server two. Added it as an additional IP on both servers. But then neither server could communicate outside of it subnet. I did kind of expect this. I then tried removing 172.16.8.15 from server 2 additional IP and 172.16.16.15 from server 1 additional IP. Now both servers could see the entire network (all subnets). But NLB doesn't work as this is now two seperate clusters due to two seperate IP's. I've always been under the impression this could work but I see no way of making it work. Unless I put both servers on the same site however this kind of defeats the object of load balancing accross the WAN. All help welcome. -- aza2004 ------------------------------------------------------------------------ aza2004's Profile: http://forums.techarena.in/members/aza2004.htm View this thread: http://forums.techarena.in/server-cluster/1089102.htm http://forums.techarena.in

Re: NLB across subnets "Russ Kaufmann" <russ.kaufmann[ at ]mindsharp.com> 12/18/2008 2:30:55 AM "aza2004" <aza2004.3kke3d[ at ]DoNotSpam.com> wrote in message news:aza2004.3kke3d[ at ]DoNotSpam.com... [Quoted Text] > > Ok so here is my dilema. I have two terminal servers on different > subnets (different locations). NLB nodes need to be in the same subnet. You can use a VLAN that stretches across the two locations. -- Russ Kaufmann, MVP, MCSE: Messaging and Security, MCT, MCITP, MCTS and other stuff ClusterHelp.com, a Microsoft Certified Gold Partner Web http://www.clusterhelp.com Blog http://msmvps.com/clusterhelp

Re: NLB across subnets aza2004 <aza2004.3km0fc[ at ]DoNotSpam.com> 12/18/2008 10:15:59 AM setting up a vlan across two locations isn't feasible here as our wan switches only support physical port based vlans. But thanks for the info, I will put both servers on the same subnet. Come back to this later after we have refresh our network switches. -- aza2004 ------------------------------------------------------------------------ aza2004's Profile: http://forums.techarena.in/members/aza2004.htm View this thread: http://forums.techarena.in/server-cluster/1089102.htm http://forums.techarena.in

Re: NLB across subnets James Yeomans BSc, MCSE 12/18/2008 9:33:00 PM If you want to load balance between 2 servers you could try implementing Round Robin DNS. You create 2 records with the same name each with a different ip address and configure your dns server to allow round robin dns. This will cause the server to alternate the address that it hand out, it is primitive but should give you an even distribution between your 2 servers: http://www.justaskjames.co.uk/default.asp?link=139 -- James Yeomans, BSc, MCSE Ask me directly at: http://www.justaskjames.co.uk "aza2004" wrote: [Quoted Text] > > setting up a vlan across two locations isn't feasible here as our wan > switches only support physical port based vlans. But thanks for the > info, I will put both servers on the same subnet. Come back to this > later after we have refresh our network switches. > > > -- > aza2004 > ------------------------------------------------------------------------ > aza2004's Profile: http://forums.techarena.in/members/aza2004.htm > View this thread: http://forums.techarena.in/server-cluster/1089102.htm > > http://forums.techarena.in > >

Re: NLB across subnets "Russ Kaufmann" <russ.kaufmann[ at ]mindsharp.com> 12/19/2008 12:13:10 AM "James Yeomans BSc, MCSE" <JamesYeomansBScMCSE[ at ]discussions.microsoft.com> wrote in message news:A6A5AD4B-5E8D-494B-8E0B-87C07A860F10[ at ]microsoft.com... [Quoted Text] > If you want to load balance between 2 servers you could try implementing > Round Robin DNS. Round Robin DNS is not a high availability solution. If one server is down, DNS will continue to refer clients to the down server as a percentage of the membership in the round robin solution. So, if you have two servers in this configuration, and one server goes down, half of your clients will be directed to the down server. -- Russ Kaufmann, MVP, MCSE: Messaging and Security, MCT, MCITP, MCTS and other stuff ClusterHelp.com, a Microsoft Certified Gold Partner Web http://www.clusterhelp.com Blog http://msmvps.com/clusterhelp

Re: NLB across subnets aza2004 <aza2004.3ko0nc[ at ]DoNotSpam.com> 12/19/2008 11:44:24 AM James I'm with Russ on this I have used round robin before although extremely effective at load balancing. There is no redundancy built in as Russ says clients continue to be directed to a down server. I have now moved the server to the same site and am in the process of setting up NLB. However once our network switches have all been replaced then I will look at the vlan option again. Thanks for the suggestion and thanks for the help. Aaron -- aza2004 ------------------------------------------------------------------------ aza2004's Profile: http://forums.techarena.in/members/aza2004.htm View this thread: http://forums.techarena.in/server-cluster/1089102.htm http://forums.techarena.in