A Common Misconception About Virtual IP Configuration

RoyATokeshi
May 9, 2006 9:57 am

Citrix states in their article: CTX109207

Document ID: CTX109207, Created on: Apr 27, 2006, Updated: Apr 27, 2006

Products: Citrix Presentation Server 4.0 for Microsoft Windows 2000, Citrix Presentation Server 4.0 for Microsoft Windows 2003, Citrix Presentation Server 4.0 x64 Edition

Summary

Any application published on Citrix Presentation Server 4.0 Enterprise Edition that has Virtual IP enabled will consume a Virtual IP address regardless of whether it is listed in the “Monitor the following processes list” or not.

Background

This article was written to clarify one major aspect of enabling Virtual IP on a Citrix Presentation Server 4.0 server – that Virtual IP is enabled for ALL published applications on a server with Virtual IP enabled.

Mistaken Assumption About Virtual IP

When a process is listed in the “Monitor the following processes list” in the farm properties, that application uses a Virtual IP each and every time it is launched. If a process is NOT specified in that list, it does not receive a Virtual IP address.

Corrected Reality About Virtual IP

If you enable Virtual IP on a Citrix Presentation Server 4.0 server (and define an IP address range), ALL sessions that are started on the server consume an IP from the pool of available IP addresses regardless of whether the processes that are started in the session require them or not. The IP address is reserved for use within this session by processes that are listed in the “Monitor the following processes list.” Processes that are not on the list do not utilize this reserved IP address for network communication.

So for example, if you have a telephony (or “CTI”) application that requires a Virtual IP address and then you decided to publish Notepad and Adobe Acrobat Reader, these applications also draw a Virtual IP from the defined pool of IP addresses even if they are not specified in the “Monitor the following processes list” in the farm properties.

If you only have a small range of IP addresses and need them all dedicated to the CTI application, you should not publish other applications on that server. Applications that require Virtual IP should be “siloed” on dedicated servers where users cannot inadvertently draw from the IP address pool.

More information

• CTX106319 – MetaFrame Presentation Server 4.0 Administrator's Guide, p.250

• CTX107059 – Advanced Concepts Guide , p.122



Primary links

Custom Search

User login

Who's new

  • Rullydery
  • eagenorce
  • rittaarier
  • swasseZex
  • gaterfoko

Who's online

There are currently 0 users and 3 guests online.

KrissysCorner.com RuthSwensonLaw.com CreativeLizardProductions.com

DISCLAIMER:

None of this has anything to do with us, someone else is responsible for the entire thing, and we have no idea who or why. We do not know anything about it. It may be alien life forms for all we know: we haven't a clue. You cannot blame us for anything that may result from your visit. That was entirely your own personal choice, made by you of your own volition, and without our knowledge. We do not, after all, have any control over you and cannot by any stretch of the imagination be expected to accept or acknowledge, be it legally or morally, any accountability for decisions made by you on an independent basis, utilizing your own free will, and without our intervention. We are therefore in no way, shape, or form answerable to anyone for any consequences arising from the aforementioned or indeed any other actions, similar or otherwise, because it was not us that did, or did not do anything. It is not even remotely our fault, and we are in no way prepared or willing to accept any liability, not even slightly, ever. We are, in fact completely and utterly blameless, in that it is definitely not our concern, and no blame can possibly be laid at our doorstep, even if we had one, the possession of which we hereby reserve as being entirely our own free choice. The onus is not on us at all, and furthermore, never has been. The entire matter is wholly beyond our control, and completely out of our hands, each of which are washed scrupulously clean of the whole business. We are not accountable for anything at all, and we hereby categorically deny all responsibility for all that has ever, or will ever happen. Our innocence is therefore wholly beyond doubt and absolutely unimpeachable, and so cannot, under even the remotest or unlikeliest circumstances, be brought into question. By clicking either on a link on this site, clicking on a link that leads to this site, or by arriving at this site by natural or supernatural means, you are in effect accepting responsibility for the fact that it is all entirely your own fault, down to the most miniscule detail, and that you are wholly accountable for whatever outcome may arise as a consequence of the aforementioned action or actions insofar as they were undertaken personally by you on an entirely voluntary basis and without any persuasion, coercion or influence from any party or parties other than yourself. Don't come sniveling to us, we are only figments of your imagination. I also agree that if I am ever with a contributor to this website during mealtimes I agree to pay for any super-sizing of their meal, or at least a nice dessert or one of those foo-foo drinks with an umbrella or a monkey. By admitting to have seen the worthless spineless drivel on this website (also known as content)

I Agree Wholeheartedly and Without Reservation to the above. (Except maybe for that part about the monkey.)

All Your Base Are Belong To Us.

Soylent Green Is People!

Never make a bet with a Sicilian when Death is on the Line!

No. Really, I do agree.