We have a medium-sized network of 600 users, all on Cisco switches. Where the users are allowed to plug in routers, etc. on the endpoints, so that they can use wireless and/or multiple devices in their rooms.
The problem is that we are experiencing instability issues on one of the VLANS (a rather large one). DHCP server should be working fine, as the other VLANS are fine. The weird thing is that this occurs in bursts where the internet is reported to be 'slow', something which have not been reported before. These incidents have not been happening on our current configuration before, and we have not changed the configuration. DNS is also fine, so that's out of the question.
There is however a lot of people that have been moving into these buildings, and they might have plugged some equipment that may be causing this issue.
We are using STP with Portfast and BPDUGuard enabled.
- What are some good ways to troubleshoot these kinds of issues?
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