To identify whether the cogestion is at Lan port end or switch port end

To identify whether the congestion is at switch port end or LAN port end just see the flow of packets.

Packets received should not be much larger the packet send . If the packet received is much larger than packet sent then it would result in congestion at Lan port end. Its effects are : slow webbrowsing, connectivity loss for short duration(in min) etc. This is may be due to the behaviour of operating system. To resolve: 1>disable the LAN card for minute to discard incoming packets if not then , 2>shut the system for 5-10 minutes so that incoming packets would be discarded. Repeat it once or twice if necessary.

Fig : Congestion at Lan port