United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. High Availability Clustering.
Sign in to vote. Physical Node 1 IP address: XX from subet I remember back in the day when we were installing all the servers I was told if I wanted computers to show up when I browse computers I needed to have a server at each location and it has work great until now when we migrated to server ? My network guy tell me this is a security problem seeing all the computers on the network so I thought Microsoft is limiting browsing the network.
My network consultant was working with Microsoft support and after installing a patch network browsing is back to showing all computers on the network.
To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. We just migrated to Server R2 and now we are having network browsing issues When searching computers can only see local cannot search on different subnets?
Is this a Bug or a service? If you try and search for a computer name it also does not work can only search for local computers if you type the computer name directly in my computer it works and you can connect. Popular Topics in Windows Server. Spiceworks Help Desk. The help desk software for IT. Track users' IT needs, easily, and with only the features you need. Learn More ». Using weak host receiving and weak host sending allows for more atomic, custom configurations than forwarding.
Basically you can have multiple gateways on a server but only one default gateway. You can add more than one default gateway on the same NIC but then they will only be used when the default gateway filled out in is not available, it will then try the next one and so forth. Whether it is wise to provide gateway redundancy in such a manner is another discussion. This is a rather uncommon scenario on a windows server. You can use it for redundancy or when you want the traffic to go to a certain default gateway instead of another when it is available so separate traffic for example for cost or to reduce the traffic load.
In that case you get this warning:. Warning — The default gateway is not on the same network segment subnet that is defined by the IP address and subnet mask. Yes No. I am setting up a website with NLB for high availability. I have two identical webservers: with Public IP But when i go outside this range for example I surf this site using an account with public IP What version of windows are you running?
Oh i forgot to mention, its Windows Server SE. I am trying to set this up using vmware esx 4. I have 2 servers each on a seperate host. I setup the NLB as a multicast as specified by vmware. The only way i can ping the VIP is the following: 1. From a server on the same subnet, and this server has to be on the same esx host.
Can you route a sever on that subent without configuring NLB form another subnet, in other words does routing work at all? NLB NIC should allow an gateway, it might give a warning with some advice but you should be able to put one in. I have 2 R2 servers in NLB. I Understand i should use ARP -s command to set a perminent record of my default gatewaty..
Is there a parallel command in netsh? Check also that you have uses forwarding or weak hoste settings in Windows R2. There are many factors involved here. That way all people frequenting tha forum can help out and others can learn from it as well.
Many many kudos on this WNLB effort. Again, very well done and much appreciated. Hello Mike, thank you for your kind words. Thanks a lot for this — very informative. The routing information here tied it all together nicely — cheers! There may be other questions before then but one thing looms right now. Leave it on, that is the default. It can cause issues when just disabled and I have never seen MS tell us to disable it, I have seen them tell people to enable it again for OWA.
Hi, let me preface this by saying thank you so much again for your efforts here as well as the feedback as it was so instrumental. I also hope this post may help someone else as you have helped me. Everything went great except for 2 unexpected results. Subsequently I put them on separate hosts and the cluster remained converged.
So it works fine with the configuration only on switch A. But what happens if we lose switch A? Thanks for you detailed feedback.
That way you could drop the disable-snooping and you might have more success. So removed config from switchB again. It would be nice to hear from VMware on this one to hear what they have to say on this combination. Giving both NICs the same gateway leaves you with the issue which one will be used and can also lead so some issues with partitioning.
One way to deal with that is to give only the one that needs to route the gatway and the other not, which makes it very clear how traffic gets routed, if it gets routed if. If you leave both gateways filled in you can play with the metrics to determine which one is used for routing. This also prevents some partioning or other converging issues during a reboot of the nodes.
Now to force access to the database over the private NIC … well they are on the same subnet so this is a hard one. For example, if your network has a port or port switch, and only two of those ports connect to NLB nodes, the switch may end up broadcasting significant network traffic to 22 or 46 servers that don't need it. Option 1: Insert a hub between the network switch and the NLB nodes.
The hub forwards traffic to the NLB nodes, and servers that connect to the other switch ports don't receive the extra NLB traffic. Make sure that other subnets can reach the VLAN. In some cases, you want to have two network interface cards NICs on your computer. If you are running Windows Server or later, you must enable IP forwarding on the NICs in order to ensure that traffic gets routed properly.
IP forwarding is enabled by default in earlier versions of Windows. On the computer that you want to configure, open a Command Prompt window and run the following command:. By default, the virtual switches in virtual environments usually prevent unicast flooding. For more configuration information, see the following resources:. If you are using Hyper-V to run your virtual environment, open the Hyper-V management console.
Select OK. This article explains how to configure the virtual network infrastructure. Remember to contact VMware if you have questions about their documentation. If you are using another virtual environment such as XenServer or VirtualBox and you are experiencing similar issues, contact the manufacturer for guidance.
Multicast mode differs from unicast mode. To support this configuration, you must configure the network infrastructure to use static ARP entries and MAC address table entries. If you skip the manual configuration step, the network switches may flood NLB traffic to all ports or drop packets. The network may seem to function correctly at first, but problems increase over time. The articles that are listed in the following table explain clearly what you have to do to correctly configure your network infrastructure, based on your network infrastructure vendor.
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