I'm having a big delay with an external application.
When I do this connection:
PC - Sw2900 - Core5500 - Router - WAN
The application takes 2 minutes for making any request.
When I do next connection:
PC - Core5500 - WAN.
The application takes 10 seconds for making any request.
I changed the fiber connection, Ethernet port, it's working with full duplex, I sent a lot of traffic from the Sw2900, I didn't any error, I disabled the local firewall of PC.
Do you know If I can check something else?.
Do you know If I can do anything on the Sw2900?.
What kind of application are you using?
What ports does it use?
In your next connection there is no router anymore in the picture after the core 5500, I presume this is a mistake.
The switch 2900 is probably just doing L2 switching.
What does your IP addressing looks like?
Also can you share your 2900 show run output?