How can I prevent collisions on my network? We're using extended-star topology, and after installing a 16-port...
switch there are fewer collisions but the network is still congested.
We have four switches with 24 ports as well as one hub with 24 ports, and it seems that the people most affected by collision are connected to the 3Com hub.
Secondly, how do I remove the domain name system (DNS) from our primary server?
The fist step in preventing collisions within your network would be to remove all hubs; they are simply a source of problems and nothing more.
When a frame enters a hub it will exit out all ports, creating unnecessary traffic on your network; whereas a switch will only send the frame out of the correct port -- where the destination machine resides. All ports on a hub belong to the same collision domain; conversely, on a switch each port belongs to one collision domain.
In many cases, I've seen problematic hubs generate garbage traffic that would affect most workstations and servers on the network, so keep away from them.
Secondly, you've got around 120 ports available on your network, which is a fairly large amount for one flat network. I usually start to break networks with more than 50 hosts into smaller segments in order to avoid broadcast/collision problems.
It might be a good idea to look into breaking the network into smaller pieces, using widely known Virtual Local Area Networks (VLANs). With VLANs, you effectively create smaller, separate networks and join them using either a router or Layer 3 switch.
If you're interested in learning more about VLANs and how you can connect them between each other, you can visit my firewall.cx website, where the topic is analyzed extensively.
You also mentioned that you wanted to remove the DNS server from your primary server. Depending on your network setup, this might not be a good idea, especially if you're running Microsoft Active Directory which requires the DNS service in order to function correctly.
However, if you've got a workgroup, then moving the DNS server to a different machine shouldn't be that much of a problem.
Related Q&A from Chris Partsenidis
Expert Chris Partsenidis offers guidelines for a smooth and successful PSTN to VoIP migration.continue reading
What SIP trunking basics should you know before you deploy? SIP trunking guru Chris Partsenidis explains what you need to know about SIP trunking ...continue reading
There are many new network security devices on the market today. Expert Chris Partsenidis opines on whether these can replace firewalls.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.