CSS11000 - Configuring Maximum TCP Connections

Question

Hi,
Maybe this is a stupid question. But I'm going to ask it anyway :)
If I set the max connection on a service can I redirect the connections that are over the max connection to an error page?
Or I'm I looking in the wrong place. I'll try to explain what I’m trying to do.
I want to protect my application servers, if my application servers reaches a certain threshold I want to redirect the connection to a error page.
How should I tackle this problem.
Thanks in advance for your help.
Geert

Answer 1

Hi Gilles,
First of all I wanted to thank you for help. Very kind of you to take time helping us.
Second of all I want to apologies for my first post. I should have been clearer about the problem.
Let me try again.
Our web servers connect to our backend vip. Now the specific application doesn’t like being switched from one server to the other while in the same session. We tried to solve this problem but we didn’t succeed.
Now we gave up balancing that application.
But now we want to set a limit on how much connections can flow to that one application server. So the application server won’t give up under high load.
Now when the load goes above a certain value we want to display an error page. Something like sorry try again later. But if server 1 crashes we want all connection goes to server 2. We don’t want the connections to go to server 2 when the max of connections is reached. Because than we want to see the error page.
When I tried to create a redirect service to an url I got :
%% Cannot have a redirect service on a Layer 4 rule.
Now the redirect to an error page isn’t a real must. More a nice to have. But what we would like is that the server2 only takes over if server1 is down and not when the max connections is reached.
Now this is what I have by now. But now I’m a little bit stuck. We noticed than if we are load testing the webserver thinks app1 is down because it reaches the max connections and goed to server two. Witch we don’t want.
service geert
type redirect
keepalive type none
redirect-string "www.cisco.com"
active
service cisco_1
ip address xxx.xxx.xxx.xxx
protocol tcp
keepalive type tcp
port xxxx
keepalive port xxxx
string 5
max connections 40
active
service cisco_2
ip address xxx.xxx.xxx.xxx
protocol tcp
keepalive type tcp
port xxxx
keepalive port xxxx
string 5
max connections 40
active
content cisco
protocol tcp
port xxxx
vip address xxx.xxx.xxx.xxx
add service cisco_1
primarySorryServer cisco_2
flow-reset-reject
active
with kind regards,
Geert