Tag Archives: traffic

Troubleshoot a Slow Network – Slow Server

… Network Card Underutilized. Connect your server on the backbone or on 1GB switch ports to make use of the high speed network card. You probably want to limit all your clients to transfer at 100Mb so that there is no traffic discrimination. If your server and switches support higher transfer rates, (10GB ports), make sure you make use of it. Slow disks. Poor hardware is many times the main reason. Improper configuration, such as choosing the wrong RAID type, or not using write caching can be …

Troubleshoot a Slow Network – The entire Network is Slow

… Broadcast storm You can efficiently detect a broadcast storm using a packet sniffer or a managed switch. With a packet sniffer you need to look for large numbers of broadcast/multicast (more than 20% of the total traffic it is an alarm signal). Locate the retransmission packets and search for the source MAC address. Disconnect the problem host. If you suspect a broadcast storm in your network and you don’t have a managed switch or a packet sniffer, you can run download and upload tests by …

Computer Network – Tools and Supplies

… different devices on your network. Modern switching devices can make a virtual map of all of the devices in your network and route packets according to this map. Older connectivity devices, such as network hubs, used to indiscriminately broadcast the packets on all of the ports and only the device which the packet belonged to would have accepted it. This design creates a lot of collisions and saturates the network with unnecessary traffic. Network hubs, (two or more ports), or repeaters, …