Network Load Balancing (NLB) is a component in Windows Server operating systems that load balances network traffic (sent to a cluster virtual IP address) among multiple servers in an NLB cluster.

learn more… | top users | synonyms

7
votes
6answers
7k views

Linux equivalent of Windows NLB

With Windows, we can setup load balancing for arbitrary IP services just by installing NLB and selecting which nodes we want in the cluster. It does some MAC address changing, then has algorithms to ...
4
votes
0answers
460 views

Unreachable Hosts in Windows NLB on VirtualBox [closed]

Setup Cluster : Two Windows Server 2008 R2 nodes. Each running as a VM inside of VirtualBox. Each Node has NLB enabled and a cluster configured. The cluster is configured to use IGMP Multicast. ...
4
votes
1answer
1k views

Setting up Multicast NLB Cluster with HP 6120XG Switch

How can I setup an NLB cluster across 2 blades connected via a HP 6120XG Switch? All of the guides are for Cisco and setup static ARP entries on the switch but that is not possible on the HP Switch. ...
3
votes
4answers
3k views

Load balanced IIS. Should I use NLB, or linux-based reverse proxy, or something else?

What would be the best approach for load-balancing at least 2-3 Windows 2008 R2 IIS webservers running a multitude of .NET applications? My choices appear to be: 1) Hardware-based network device load ...
3
votes
2answers
2k views

How NLB will work with IIS-7 web services?

We'are going to join 2 (two) IIS7 web-servers into NLB with the same web-service published (2 instances of the same web-service one per web-server). Do I understand correctly, that NLB will work for ...
3
votes
4answers
2k views

Multiple web servers in a IIS web farm behind a single IP address

I have 4 web servers (Windows Server 2008 R2) and just one public IP address. They all need to be a part of web farm (so the requests for the site are spread over all servers). Two questions: 1) Is ...
3
votes
1answer
345 views

How to setup NLB and ARR in server 2008 R2

I'm in charge of deploying a web application. I don't have a hardware load balancer to use. So I thought I could use NLB+ARR. Need to use ARR because my team needs to be able to take one of the 2 ...
3
votes
2answers
5k views

Cannot add second host to a Network Load Balance cluster

I am using Network Load Balancing on Windows server 2008. (Servers have two NIC's and the cluster is configured to run in unicast mode) I can configure the cluster on either of the hosts and add the ...
2
votes
2answers
479 views

MS NLB: why are multicast packets received by all servers on the LAN, not just members of the cluster

I have a MS NLB cluster (Win 2003) which includes just two hosts. The cluster is configured to use Multicast operation mode (not IGMP). For some reason I am seeing packets intended for the NLB ...
2
votes
1answer
221 views

Setting up NLB in a VLAN

I have a network layout like this (ESXi hosts): Internal Network + +-----------------+ ...
2
votes
3answers
1k views

NLB configuration

I have an NLB configured for two web servers. The NLB is a software NLB configured on Windows Server 2008 R2. The web servers are IIS servers. For a request of 5000 users, all my requests are going to ...
2
votes
3answers
3k views

Maximum concurrent connections to a Microsoft NLB Cluster

We recently had a problem with maximum conncurrent connections on a Microsoft NLB cluster, that I got an answer to on stackoverflow: ...
2
votes
1answer
253 views

Drainstopping NLB via powershell remotely

This question was asked by a colleague on SO here, though it was suggested that we ask it here instead - apologies for the cross posting. Server is Windows Server 2008 R2 - UAC is disabled on the ...
2
votes
1answer
209 views

Sharing Windows 7 NLB in home network [closed]

I have read this question and have been googling trying to do what is in the title, with no luck. I´ve tried bridging connections, ICS, etc. I have two separate internet connections from two ...
2
votes
1answer
367 views

NLB for incoming SMTP connections from a single server

We have 2 Exchange CAS servers running NLB. We use an outsourced SPAM provider who forwards messages to us. All of the messages from them go to a single CAS server because we only see one IP address ...
2
votes
2answers
238 views

Network Load Balancing Windows server 2008

I have a questions about load balancing configurations. Maybe someone already asked this question but I didn't find something similar on the web. The Actual Configuration is . I Have two servers ...
2
votes
1answer
4k views

NLB RPC server is unavailable on the specified computer

Firstly, I'll admit that my networking knowledge is limited so as people request more information I'll update this question accordingly. I am trying to create a NLB Cluster across 2 Windows Server ...
2
votes
0answers
228 views

WS2008R2 - Network Load Balancing and IIS - I have no idea

I'd like to avoid discussion of IIS ARR for now - it isn't essential to get NLB working. I have two computers (both in the same domain, btw) who are connected to two networks: A private internal ...
2
votes
0answers
320 views

iis 7.5 - WFF and ARR farm management

We have two test web farms (IIS 7.5). The Florida web farm has two ARR servers and two content servers. The ARR servers have WFF and NLB installed. The ARR setup uses a shared config located on a file ...
2
votes
1answer
239 views

Dynamically add Server 2008 NLB Nodes

I have a small NLB cluster for Terminal Servers. One of the things we're looking at doing for this particular project (this is for a college class) is dynamically creating Terminal Servers. What ...
1
vote
1answer
835 views

Windows NLB detect dead IIS?

We're running 4 webservers through NLB, however every once in a while a single IIS dies on us (not the Windows, it still works, it's just the IIS returns 503 Service unavailable) Is it somehow ...
1
vote
1answer
53 views

Is there a primary webserver in a NLB scenario?

I help administer a small NLB that points to two Windows Servers running IIS which share a configuration. The sites' flat files are replicated using DFSR. I get the gist of how this all works from ...
1
vote
2answers
2k views

How to replicate wwwroot over multiple IIS web servers with NLB without NAS?

We're adding a second server with Windows NLB for a bit of redundancy (ie the power goes on one of the servers - I know its not the best solution). How can we keep the data identical between the ...
1
vote
1answer
275 views

Advantage of Microsoft Cluster over Microsoft Network Load Balancer

Till recently, I assumed that Microsoft NLB worked at an OS/Machine level rather than an Application Level. i.e. the NLB just monitors heartbeats on the machine to check if machine is alive and then ...
1
vote
2answers
722 views

MaxKeepAliveRequests for IIS7 (with NLB)

We have an IIS7 running on several nodes in an NLB cluster. The NLB nodes are set to Affinity:None so that new connections are spread across them. We want KeepAlive switched on so that we can get ...
1
vote
1answer
2k views

Windows 2008 Server Standard Edition, supports NLB?

Windows 2008 Server Standard Edition, supports NLB?
1
vote
3answers
3k views

Windows Network Load Balancing on ESX Cluster with Dell PowerConnect stacks

We recently switched out our Cisco 6500 core switch for a pair of Dell PowerConnect 6248 stacks. Since then, our Network Load Balanced Sharepoint, which runs on two virtual machines on an ESX cluster ...
1
vote
1answer
235 views

How do I prevent a server from joining the NLB when it starts up?

I have a problematic Windows Server 2003 box (MOSS 2007) that caused problems so we shut it down. When we bring it back up it joins the NLB (one other server) and causes problems. We tried shutting ...
1
vote
1answer
849 views

ISP Load Balancing with ISA 2006

I understand that ISA 2006 has an integrated Network Load Balancing feature. We also recently acquired a second internet line through a second service provider. I know it is possible to purchase a ...
1
vote
1answer
1k views

Can I use NLB to balance multiple sites on the same (n) servers?

I know this is probably a simple question, but I can't seem to find a definitive answer anywhere. We have two servers (Win2K3 SP1) running a single website on IIS 6.0 under NLB. Each server is ...
1
vote
2answers
142 views

How to synchronize applications between two terminal-service servers?

We have two terminal-service server and we use Network Load Balancing (NLB) to cluster this two terminal-service servers together. We need to have the same applications installed on the two servers, ...
1
vote
1answer
35 views

Network Load Balancing Manager failover

I would like to be notified when one of my clusters in Network Load Balancing Manager starts up or fails. The documentation seems to infer that there are no advanced scripting, logging, or ...
1
vote
1answer
855 views

Windows Remote Desktop Cluster - can we force some users to a specific server?

Given an RDS cluster with NLB, users connect and login to one of the servers at random. But there is one program that's only available on one of the servers (licensing reasons). Can we force a group ...
1
vote
1answer
95 views

Can I run two virtual Windows Server 2008 machines in an NLB Cluster all on one Windows 7 box?

I am writing a prototype ASP.NET web application that demonstrates the use of distributed caching for scalability purposes. In order to do this, I would like to set up a couple of load balanced ...
1
vote
1answer
150 views

can one cluster IIS- WAS for TCP/IP clustering or is it HTTP only

Does the NLB (network load balancing) feature of IIS extend to an ability to cluster TCP/IP traffic using WAS (Windows Process Activation Service)? I could certainly use HTTP to host WCF services but ...
1
vote
1answer
1k views

TMG Array + Network Load Balancing

I have a pretty simple TMG array setup that is managed by an EMS server. The 2 servers that is in the array TMG01 and TMG02 sits in my DMZ and talks to the EMS server that is on my internal network. ...
1
vote
1answer
497 views

Using Windows Network Load Balancing for one IP only?

When configuring NLB, you choose the cluster IP. This removes any other secondary IP addresses for the network adapter. How can I have one cluster IP shared by NLB while still having multiple ...
1
vote
3answers
836 views

Could SQL Server 2008 replication be used with NLB to allow unlimited scaling of reporting servers?

We are currently using transactional replication in SQL Server 2008 to keep a secondary reporting server synchronized with a primary database server. This has been working weel and keeps some of the ...
1
vote
1answer
301 views

How do I know if I set up the network load balancing cluster correctly?

I'm working on a web conference where we are going to show about 12 videos for a total of about half a gig. Since all the participants are going to be watching (and also streaming/downloading) at ...
1
vote
1answer
114 views

NLB/DFS between servers at different locations?

I currently run a web application on a single VPS but have the need to make it redundant so that the website will not become unavailable in case the server goes down for any reason. I have found that ...
1
vote
0answers
97 views

Load balanced iis 7.5 and one-to-one certificate mapping

I have a scenario where I need to run an application through hardware HTTPS load balancing that does round-robin. Clients will authenticate through pre-issued certificates from a standalone root CA ...
1
vote
1answer
1k views

Unable to add a second Windows Server 2008 to a NLB cluster

I am trying to setup a 2-node cluster with NLB on Windows Server 2008 R2 standard. One the first node (node A) I successfully create a cluster containing it. However, when from node A I attempt to ...
1
vote
1answer
679 views

Uneven load with Microsoft Network Load Balancing (Server 2003)

I am a network administrator at a small company that uses Network Load Balancing (NLB) to cluster our terminal servers together. Recently, we changed our network setup due to PCI-DSS compliance. ...
1
vote
1answer
551 views

Network Load Balancing, intermittent port problem on Windows Server 2008

Trying to troubleshoot an intermittent problem on a Windows Server 2008 NLB. I think it might be related to an NLB issue. We are using Windows Network Load Balancing to balance load for our ...
0
votes
1answer
159 views

How to make our web infrastructure more redundant?

We have a single dedicated web server that we pay for monthly from a hosting provider. This server runs Windows Server 2008 Standard Edition with IIS and SQL Server 2008. We have a few websites that ...
0
votes
3answers
1k views

Good idea to use NLB for DNS servers?

Is it a good idea to use NLB to load balance DNS requests to primary and secondary dns servers on port 53?
0
votes
3answers
435 views

Control how requests are distributed on a NLB cluster

We are testing an application on an NLB cluster. We notice that the requests are not being spread evenly between the servers in the NLB cluster. Is there anyway do configure the requests to be ...
0
votes
1answer
339 views

Predictive vs Least Connection Load Balancing Techniques

I have a windows based desktop application that communicates via TCP to the application servers. (windows 2003). No sticky sessions between client calls. We have exactly 2 servers to load balance and ...
0
votes
2answers
1k views

Network Load Balancing problem

Summary I have two machines in an NLB cluster. If I shut-down one machine (to simulate failure) then the second doesn't take-up the load. I'm looking for help in diagnosing the reason for this. ...
0
votes
1answer
139 views

Updated: NLB 2 Windows Server 2003 Servers - Looking to Hire SysAdmin to solve!

I need to configure windows NLB on 2 dedicated servers I have. My main machine has been running for some time, with several domain names pointing to the servers primary IP address. Both servers have ...