Ethernet loop in office
Does anyone have experience with network loops, spanning tree protocoll and redundant lines between switches?
Though our switches should use spanning tree protocol to provide redundancy. We have used redundant lines to our access-switches. Network specialists have installed this over one year ago. A few months ago, we notices strange things within our network. continuous ping to different virtual machines are answering with timeout sometimes, but nobody did sth before and after. So we thought the VMs are overloaded or had problem with storage.. long history. checked hardware and vmware, but no result, everything works fine. Networkspecialist from HPE has done logfile analyses and say we have network loop. Funny, because there isn't any loop besides redundant ways to access switches. And this is set to spanning tree, just one line is configured as "forwarding" and the 2nd is configured as "blocking".
Does anyone know some tools for checking network for ethernet loop? In office we're using HPE and aruba components. At home i'm using netgear (cheapest 8-port-managed switch) which has loop detection built in already. And also unifi which also could detect loops and use spanning tree protocoll. I wonder why more expensive hardware won't be able to detect ethernet loop.
Actually the aruba-switches say there's no loop and spanning tree is working fine.
But we have noticed through HPE's logfile analysis, two MAC-addresses are coming up to two ports of our redundant applied core-switches.
Can somebody give me some advice what i should check?
- 4.9K All Categories
- 2.6K Ask about Connected Technology
- How To...
- 927 Devices & Security
- 1.5K Network Troubleshooting & Connectivity
- 100 General Discussion, Weird & Wonderful
- 37 Network Infrastructure
- 4.4K Ask about Fing
- 406 Fing Account Change Request
- 865 Fing Desktop
- 1.1K Fing App
- 1.5K Fingbox
- 467 Announcements, Beta Testing & Release Notes
- 147 Community Updates
- 19 Getting started
- 11 Community User Guides