Solved

MS NLB & F5 load balancer

Posted on 2013-06-16
3
1,761 Views
Last Modified: 2013-06-29
I have a number of about 6 Prod IIS web servers that are
are currently load-balanced using MS NLB.

However, we don't have UAT / test environment nor test
servers for these but would like to test them out.

Can I just create a separate VIP (ie separate from the NLB VIP
for the F5 LTM load balancer that points to the same group (or
perhaps only 2 ) of the webservers just for a small group of
users to access (this F5 LB/LTM VIP) for testing?

Any problem in NLB & F5 co-exist in this manner?  Any
caveats or anything I need to take note of so as not to
adversely affect production
0
Comment
Question by:sunhux
  • 2
3 Comments
 
LVL 17

Assisted Solution

by:TimotiSt
TimotiSt earned 500 total points
ID: 39263437
I'm not sure I understand why you are using a hardware loadbalancer and NLB at the same time?
They should work together, it just seems a bit overcomplicated.

Can you post a little network diagram of your setup?

Tamas
0
 

Author Comment

by:sunhux
ID: 39269516
I'm trying to replace NLB with F5 hardware LB but I don't have
UAT to test this F5 LB out.

So, I'm thinking of defining a VIP for the F5 LB with 2 webservers
as its members (we currently has 6 webservers in NLB) for testing
purpose.  

After some testing (perhaps you can suggest what kinds of tests, eg:
least-connection-load, session stickiness, ... , anymore ?) when we're
comfortable, we'll define all 6  webservers as members of this F5
LB & then change the DNS entry, say, current_NLB_url  to point to
the F5 LB VIP & that would migrate us from NLB to F5.

In the event of problem, we can quickly redefine in DNS to point
back to the NLB VIP as quick fallback
0
 
LVL 17

Accepted Solution

by:
TimotiSt earned 500 total points
ID: 39274744
If you can access the 2 testing servers with their individual IPs (not the VIP of the NLB), then you should be able to bind those to a VIP on the F5.

The balancing predictor and stickiness config depends on your application. For any kind of SSL, you'll want sticky. If you don't have session-sync between your servers in your application, you'll want sticky. If all servers have the same specs, you can do round-robin or least connection. If they're different, you might want to use some weighted predictor. Not sure exactly what's available on the F5.
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hyper-convergence systems have taken the IT world by storm and have quickly started to change our point of view of how the data center should and could be architected. In this article, I’ll explain the benefits of employing a hyper-converged system …
If you are a web developer, you would be aware of the <iframe> tag in HTML. The <iframe> stands for inline frame and is used to embed another document within the current HTML document. The embedded document could be even another website.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question