Check out this article on load balancing AAC servers. My experience getting this working has not been good. http://support.citrix.com/article/CTX109960 <http://support.citrix.com/article/CTX109960&searchID=33924044> &searchID=33924044 Also, if you are thinking of upgrading to AAC 4.5, check out the readme: Support of Web Interface for Citrix Presentation Server 4.0 and 4.2 The following are known issues when Web Interface for Citrix Presentation Server 4.0 or 4.2 are used in an environment that includes Access Gateway Advanced Edition 4.5: Cookies written during user sessions exceed cookie limit in Internet Explorer When users access an Access Platform site through the Access Interface using Internet Explorer, the number of cookies written by the Advanced Access Control server exceeds Internet Explorer's cookie limit of 20 per unique domain. When this happens, Internet Explorer discards the oldest cookies so that newer ones can be written. This results in a loss of session state during a typical user session and, consequently, a loss of functionality. This issue also occurs when the Advanced Access Control server is configured to display multiple Access Platform sites. This issue does not occur when using Web Interface for Citrix Presentation Server 4.5 to provide access to published applications through the Access Interface. Users are unable to set connection preferences from the Access Interface When users log on to an Access Platform site through the Access Interface, they cannot customize the connection preferences for the site. For example, when users select options from the Connection Preferences page and click OK, the selections are not saved. This occurs because Advanced Access Control causes the cookie set by Web Interface to expire. This issue does not occur when using Web Interface for Citrix Presentation Server 4.5 to provide access to published applications through the Access Interface. Sessions are not shared when users access published applications When users launch published applications through Advanced Access Control or an Access Platform site displayed in the Access Interface, the sessions that are created with each access method are not shared. For example, when a user accesses a published application using file type association or Workspace Control, a session is created. When the user disconnects from the application and then reconnects using an Access Platform site displayed in the Access Interface, the session is not used. Instead, a new session is created. While the user's experience remains unaffected, administrators might notice the server running Citrix Presentation Server experiences some decrease in performance. This decrease varies depending on the usage of published applications through Advanced Access Control. This issue does not occur when using Web Interface for Citrix Presentation Server 4.5 to provide access to published applications through the Access Interface. Installation of Web Interface for Citrix Presentation Server 4.2 on Advanced Access Control server is not supported. Installing Web Interface for Citrix Presentation Server 4.2 on the same server hosting Version 4.5 of Advanced Access Control is not a supported installation scenario. To use Version 4.5 of Advanced Access Control in an environment that includes Web Interface for Citrix Presentation Server 4.2, Advanced Access Control must be installed on a separate server. This issue does not occur when installing Web Interface for Citrix Presentation Server 4.5 on a server hosting Version 4.5 of Advanced Access Control. http://support.citrix.com/article/CTX109105 _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Greenberg Sent: Monday, November 06, 2006 12:42 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: AAC and WI on the same box? It is no problem to combine them, it saves hardware but does create a single point of failure. However, if you have multiple servers doing this, you are covered there.. Steve Greenberg Thin Client Computing 34522 N. Scottsdale Rd D8453 Scottsdale, AZ 85262 (602) 432-8649 www.thinclient.net steveg@xxxxxxxxxxxxxx _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of J. Henske Sent: Monday, November 06, 2006 11:01 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] AAC and WI on the same box? How many folks who are running the CAG/AAC are also using the AAC boxes for WI access? I am re-architecting our citrix environment to include the CAG/AAC in an HA scenario. All components will be at the latest versions. I know we will need a group of AAC servers, and a group of WIs at each site. Is there any disadvantages in combining the AACs and WIs, besides having to scale out a bit to cover the load?? Still, combining them should still require fewer machines then if I kept them separate. The WIs will be serving up the config.xml for internal PNA and some web access as well as the AAC sites. I'm thinking if I can keep the web boxes identical that it will make it a bit easier to support. Thanks for your input, Jennifer Henske Lead Systems Engineer Mercy Health System