CSS stickyness issues ????

michael.e.reid — Mon, 05 Sep 2005 10:36:18 GMT

Question 1:

I have 2 exchange servers (EXCH A & EXCH B) and 2 fax servers (FAX A & FAX B). All servers are connected to CSS.

When FAX A has mail to Exchange Server, CSS will randomly provide exchange server, let’s say EXCH A acknowledged the call. EXCH A will then need to connect to FAX A via CSS to get the mail. Can it being done via CSS? Is there stickyness on outgoing traffic from the connected servers ?

Question 2:

I have 2 Kernel Servers (KER A & KER B) connected to CSS and 2 Device Servers (DEV A & DEV B) are not.

When KER A has mail to DEV A, DEV A needs to connect back to KER A via CSS to get the mail. Can it being done via CSS?

cheers,

Mike

Re: CSS stickyness issues ????

Gilles Dufour — Mon, 05 Sep 2005 12:08:53 GMT

traffic can go through the CSS, but the destination ip should not be a vip but the real server.

In your example 1, if you want EXCH-A to contact FAX-A, I think the easiest is to open the connection directly with FAX-A and not a VIP and then ask the CSS to identify somehow that the connection should go to FAX-A.

So, keep it simple.

FAX-a can open a connection to a VIP, which is loadbalanced to one of the exch server, and this one simple open a connection directly to FAX-A.

Same for question 2, if the destination must be KER-A, I don't see why you would want to open a connection to the VIP.

If really it was required to contact the VIP, I don't see what the CSS could do to find out the traffic must be sent to KER-A or KER-B.

For HTTP traffic, we could look for cookie or portion of the url, but for other protocols there is nothing available.

Gilles.

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CSS stickyness issues ????

Re: CSS stickyness issues ????