Forum Discussion
jachalke_39650
Nimbostratus
NimbostratusOWA link doesn't work
I have followed everything whats given in "f5-exchange-2010-dg.pdf" document; most of exchange services are running fine except for OWA service on internal network; best part is it works in off hours...
Hi jachalke, it is odd that the problem only seems to happen in the daytime. This makes me suspect that it could be related to something in the BIG-IP HTTP profile in combination with IIS automatically switching from dynamic to static compression when the server is under load during the day.
Which version of BIG-IP are you running? I assume it's v10.x, since that's the deployment guide you are using. In v10, caching and compression are features of the HTTP profile, which means that you must modify the combined persistence iRule in order to troubleshoot them. You can go to the "/owa*" section in the iRule attached to the internal VIP and add the following commands to disable caching, compression, or both:
"/owa*" {
Outlook Web Access
if { [HTTP::header exists "APM_session"] } {
persist uie [HTTP::header "APM_session"] 7200
} else {
persist cookie insert
}
pool owa_pool_name
CACHE::disable
COMPRESS:disable
return
}
You could also compare the HTTP profile settings between the internal and external VIPs for clues as to why one is working and the other is not. If you want, you can post them here and we'll have a look. The tmsh command to show the profile configuration is "list ltm profile http".
thanks
Mike
