Mixing swiches sge 200 series, sg500, netgear pro safe

[Saulo Loor]

Hi,

I have this issue on my network for some reason my network tester (fluke linkrunner at) is detecting the port of other switch even if I connecting to my other switch ports ( example: connecting over an stack of six cisco sge 2000 switches in port 6 of switch 6 and on my tester shows I am connecting to a prosafe switch on port 9/.) Sometimes happen the same and shows the sg500 port.

I suspect this cause a loop on my network  (we have some network issues) can you please guide me to have the right setting to uplink this switches together?

I already enable STP!

Thanks 

[devils_advocate]

What have you selected as your root bridge for the spanning tree topology?

Have you enabled Per Vlan Spanning tree?

[Tom Watts]

Sounds to me your network tester is being flaky.