String command necessary with advanced-balance arrowpoint-cookie on CSS?
I have a question regarding the use of "advance-balance arrowpoint-cookie" for sticky load balancing.
My question is whether the string command is necessary in the service in order for sticky load-balancing to work? We noticed recently that it say in the CSS Load-Balancing Configuration Guide that:
"The syntax and options for this content mode command are: • advanced-balance arrowpoint-cookie - Enables the content rule to stick a client to a server based on the unique service identifier information of the selected server in the arrowpoint cookie. Configure the service identifier by using the (config-service) string command".
We have never used the strings command for existing services and I therefore wonder if we need to change all our services (with content rules that use "advance-balance arrowpoint-cookie") to use the strings command as below:
service Service-1 protocol tcp port 80 keepalive type tcp keepalive port 80 ip address 10.10.11.101 string CSS-Service-1 active
service Service-2 protocol tcp port 80 keepalive type tcp keepalive port 80 ip address 10.10.11.102
string CSS-Service-2 active
owner Customer-A content Content-1 vip address 10.10.10.10 balance aca advanced-balance arrowpoint-cookie protocol tcp port 80 url "/*" add service Service-1 add service Service-2 active
Re: String command necessary with advanced-balance arrowpoint-co
Your current configuration without the strings is fine, and also the most commonly used configuration. When using advanced-balance cookie on the CSS, you are using cookie-insert. The CSS will insert a cookie into the HTTP header of the server's response and if the client returns with new connection containing that cookie, the CSS will stick to the same server. If you look at the value of the cookie inserted, it will contain the IP address of the server it was load balanced to. Some customers don't not like this for various reasons. If you include the string in the services, then the string will be used as the cookie value.
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