Forum Discussion
Pranav_73262
Nimbostratus
NimbostratusUniversal persistence in GTM
Hi, can we apply iRule for universal persistence in GTM based on jsession ID?
when HTTP_REQUEST {
set jsess [URI::query [HTTP::uri] vi]
if { $jsess != "" } {
persist uie $jsess 600
}
}
...
There is a persistence setting in GTM under the WideIP you can set how long the GTM will persist the request
http://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm_config_guide_10/gtm_connections.html?sr=317015371010565
GTM works on DNS it will not see the JSESSION ID as this will only happen on HTTP request/response. Now GTM sees the the DNS look up from the LDNS servers, you can persist all query's from the same LDNS to the DC in question. Now if there is a persistence entry it will over ride the LB setting of Round Robin and send the request to the correct DC.
Pranav_73262Nimbostratus
NimbostratusThanks Richard. By 'you can persist all query's from the same LDNS to the DC in question'; are you suggesting TTL value modification or some thing else? Please suggest the way to configure, if otherwise.