Applications with same VIP and multiple port numbers

[thiyagarajankalaiselvan]

Hello All,

I'm wondering how the application is working with the same VIP IP and multiple application listening port numbers?

How the DNS resolution will forward the request to the different port numbers?

Regards,

Thiyagu

[rais]

When a VIP is defined on a load balancers it is given an IP and a Port number.

VIP interface to the clients  = IP + Port e.g. 1.1.1.1:80

On server side, this VIP can point to multiple sockets [IP + port] i.e. unique IP+port combinations.

When a request comes in, the client comes on a standard [single] port number. LB will select the port for the client. Stickiness on LB will keep the client on the same port for the session.

DNS will only reply back with an IP address.

HTH.

[iwearing]

Rais,

For a URL http://10.10.90.1:1880/Service.asmx

Would the VIP be configured for www and the Server side configured with IP adress and TCP Port 1880

Ian.

[Cesar Roque]

Hi Ian,

The VIP needs to be configured to match the port number (1880). 

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Cesar R
ANS Team

[iwearing]

Cesar,

Thanks for the update.