You'll want to be aware of latency as well. GigE with 2000ms latency != GigE with 2ms latency If you're the latter than cifs shouldn't be an issue. Dan Dill From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Angela Smith Sent: Saturday, July 02, 2011 11:17 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Citrix Farm performance over WAN Hi We currently have 30 XenApp 5 Servers split between 2 Sites. Sites are connected by Gig Links. At present we use Zone Preference and Failover and Site A is Active only. Site B is for Disaster Recovery only. Site A is running at around 75% utilisation according to Citrix Load Evaluator. As per my previous emails we are having issues with SMB bottleneck. I am considering removing Zone Pref and Failover and making Site B active also. Therefore all XenApp servers get utilised which will half the resource requirements on my servers and hopefully remove any bottlenecks. Can anyone see an issue with running with such a config. XenApp Servers in site B will need to cross the Gig link to connect to File Server/Web interface but on a gig link I think should be OK. Any pro's/con's with this approach? Thanks Ang