Network unstable

[Hung Ho]

Hi All,

I'm facing the problem is, when my laptop or PC starting, only can use Internet 5 mins, after that cannot suffering the internet about 5 - 10 mins then it back to normal, this stuff happen everyday. But can use communication messenger like skype. All local website is normally. Actually, I really don't know what the issue is happening in my office. 

My office network topology:

- I'm using VTP Mode in my office. Core Switch 3560 is VTP Server, other is Client.

- Firewall is Kerio Control.

- Laptop using cable to connect to network.

How can I workaround with this issue? any help will be appreciated .

Thanks & regards,

Hung

[Leo Laohoo]

I presume this is for school work?

[Hung Ho]

Hi,

This is my office basic network. I'm improving it day by day.

Do you have any suggest for this issue?

Thanks 

Hung