for what it is worth Angela, I have run my citrix license server over WAN links (poor ones at that) in the past and we never had any problems. However, I did keep my Microsoft TS license servers on the local nets and off the wan. Greg On Mon, Feb 9, 2009 at 6:19 AM, Angela Smith <angela_smith9@xxxxxxxxxxx>wrote: > Hi Jeremy > > Thanks for your reply. The WAN link is 30Mb so Im hoping the Citrix > Servers will have a reliable connection to the License Server at all times. > I will give it a go. I read a few Citrix documents but I have a few > questions. > > 1) I need to get my licenses re-issued as the server name in the UK is > different to the existing License Server. If I return existing licenses > will my Production farm stop working? There may be a gap of a few days > before the new license file is added to the new Licensing Server. I want to > ensure existing Citrix Production users are not impacted when the licenses > are returned. > > 2) Are there any issues with setting 1 Citrix Server to use the new > Licensing Server in the UK whilst the other Citrix servers point to local > License Server? Id like to do this for testing purposes to ensure the > Citrix Servers are working off the remote UK License Server before moving > the entire farm to the remote License Server. > > 3) If the Citrix Server looses connectivity to the License Server, will the > existing Citrix User sessions be dropped or would they be given a grace > license automatically until the connectivity to the Citrix License Server is > restored? Is this seamless to the user? > > Thanks > Ang > > > ------------------------------ > Subject: [THIN] Re: License server across WAN Link > Date: Mon, 9 Feb 2009 19:34:46 +1100 > From: Jeremy.Saunders@xxxxxxxxxxxxxx > To: thin@xxxxxxxxxxxxx > > > Hi Ang, > > > > The short answer is that this will most probably cause problems and is a > bad design. There are some awesome whitepapers from Citrix on how the > licensing service works. But basically this is what I typically write in my > design documents (taken straight from the whitepapers)… > > > > "At startup, a XenApp server talks to the License Server and gets a startup > license. This action will consume 9.87Kb of bandwidth. If the License Server > is not available, the server goes into the grace period and the IMA > (Independent Management Architecture) Service reports an error to the Event > Log. The process of getting a startup licenses also occurs if the IMA > Service is restarted at any point. > > > > Every 2 to 5 minutes the XenApp will exchange a heartbeat with the license > server to determine if the license server is still available. The amount of > bandwidth in this transaction is 462 bytes for each server. The heartbeats > are randomised between 2 to 5 minutes from when the server checks out a > start-up license. > > > > Every 24 hours the XenApp server will request a refresh of the license > server data, this is to check if license allocation has been increased or > decreased. The amount of bandwidth in this transaction is 9.87Kb for each > server. > > > > When a user logs on, the XenApp server tries for 5 seconds to request a > license; if this process fails the user gets a grace period license (30 > days)." > > > > So you can see that communication to the licensing server is important, > otherwise your servers may continually (or randomly) dish out grace period > licenses, which also causes delays in the logon time. > > > > At the end of the day you can only try it and see. You can set the UK > license server at the server level in the Access Management Console on one > of your servers and see how this behaves. > > > > Cheers, > > Jeremy. > > > > > > *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On > Behalf Of *Angela Smith > *Sent:* Monday, February 09, 2009 3:10 PM > *To:* thin@xxxxxxxxxxxxx > *Subject:* [THIN] License server across WAN Link > > > > Hi > > Our organisation is looking at utilising a "centralized" Citrix Licensing > server in another country (UK) across a decent sized WAN Link. We currently > have a local Citrix Licensing Server. Will there be any performance issues > with accessing the new license server across the WAN? Should the license > server be on the same LAN as the Citrix Servers? Are there any gotchas in > changing licensing servers? > > Setup is Windows 2003 with Presentation Server 4 > > Thanks > Ang > ------------------------------ > > Combine your email accounts here! 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