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i recently had something happen on my network at work and it caused some network issues. i think it was a malfunctioning network device that flooded the network, i unplugged it and things are fine now.<br />
my question is what is everybody's advise on good network monitoring and what ways would you use to find &quot;rogue&quot; networking devices or computers.<br />
for example, i only had an ip address to go by, i had a hard time narrowing down the device. i found the ip address on my DHCP server, but it had limited information, just like it's mac address, but the ip address and mac address doesn't tell me things like what port it is plugged into my switch, so if i knew what port, i could disable the port 
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i recently had something happen on my network at work and it caused some network issues. i think it was a malfunctioning network device that flooded the network, i unplugged it and things are fine now.
my question is what is everybody's advise on good network monitoring and what ways would you use to find "rogue" networking devices or computers.
for example, i only had an ip address to go by, i had a hard time narrowing down the device. i found the ip address on my DHCP server, but it had limited information, just like it's mac address, but the ip address and mac address doesn't tell me things like what port it is plugged into my switch, so if i knew what port, i could disable the port 

network monitoring

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

Network Analysis

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.