CSS 11503 adv-bal-stcky-srcip and failover question

[myer.ramey]

From the documentation I have read about failover (when a service fails) it lists several loadbalancing types, but the advanced-balance-sticky-srcip is not one of them. Is it possible to configure failover linear or failover next when using adv-bal-stcky-srcip? The CSS is configured for a kal (type=tcp / port=8080), but does not do anything when the service does not respond the kal.

[myer.ramey]

Please, can anyone give me some information about this?

[thamdani]

Hi MYER,

I am not sure what exactly you want to accomplish,however it seems that you want to configure the CSS in a way that if your server stops listning on port 8080 you want to mark it down and let the connection go to other server.Is it right.

If so then configure the keepalive in service like

keepalive type tcp

keepalive port 8080

Now CSS will check the server on port 8080 to make sure if its up or not.

BTW:- Loadbalancing algorithm ,adv-bal-stcky-srcip and failover are three different things.

Loadbalancing algorithm like least loaded,round robin.weighted roundrobin etc means how the CSS will distribute connection based on the algorithm configure bydefault it is roundrobin.

adv-bal-stcky-srcip is used for the sticky configuration.How you want CSS to stick the connection to the same server.

I hope that answers your question.

Tanveer

[myer.ramey]

Let me add some clarity then. :) I am running PeopleSoft through the CSS (which is the reason for adv-bal sticky-srcip). I have two services in my content rule:

service pplsft-web1

ip 172.27.144.63

port 8080

kal tcp / 8080

service pplsft-web2

ip 172.27.144.63

port 8080

kal tcp / 8080

When the KAL fails and the service is marked down, what is the CSS supposed to do?...you can configure the failover of a a service (ie: failover linear or failover next). In all the docs I have read, I read that 'failover linear' and 'failover next' were for regular load balancing techniques (ie: domain, url, srcip, destip, domainhash and urlhash). Can I use it if I have the advanced-balance sticky-srcip load balancing command on the content?

Does that clarify any?

I did get an answer from TAC...by default, 'failover linear' is enabled. But what may be happening is that because of the sticky config, the user ip is still in the sticky table, which over-rides load balancing. I have to define the settings for "sticky serer down failover" to either 'balance' or 'reject' entries in the sticky table and any requests that come in.

[thamdani]

Hi Mayer,

Thanks for that explination.

When the KAL fails and the service is marked down, what is the CSS supposed to do?

--It will loadbalance the incoming request for that server to other server.

I read that 'failover linear' and 'failover next' were for regular load balancing techniques (ie: domain, url, srcip, destip, domainhash and urlhash). Can I use it if I have the advanced-balance sticky-srcip load balancing command on the content?

----I think there is little confusion.

Here we are talking about two things.

1.domain, url, srcip, destip, domainhash and urlhash all are Loadbalancing algorithms.

2.advanced-balance sticky-srcip is not a Loadbalancing algorithm it is a sticky algoritm which sticks the client based on source IP irrespective of the Loadbalancing algorithms.

Tanveer