When creating a vlan, I get a loop after 1 hour in network. How can I check it?

[MUNIR_ENG]

hello Guys , I have added new switch type Summit X450-24x DC in my network , when i creating any Vlan after 1 hours loop happen in network , why that happened , Is there commanded or method to shows me where the defect was?

[MUNIR_ENG]

the problem fixed, with new plan in our network i removed one switch and i re-arrange the vlan for each port , But my concerns when adding a new switch i will getting same problem. thank you fro your support

[Thiago_da_Silva]

What problem friend!
There seems to be a loop topology, can be a loop on the door or a machine with a virus.
Once I shared the problem in such a network.
I had a machine that had a virus.
This virus was flooding the network with broadcast.
I took a one of the machines on the network and saw what was the machine that was causing the issue. It was a machine with full access.
you will have to do the same.
if you want to put EAPS which only works on network ring tell me I mands commands.

[Thiago_da_Silva]

How is your topology?
If it is a ring, you will need a loop prevention protocol such as EAPS or ERPS Extreme.
The ERPS protocol there is the CFM, that work with switches that are not have ERPS.
Is very nice.

[SchmuFoo]

You can try to nail down the problematic port with..

.. Extreme Loop Recovery Protocol (ELRP)

configure elrp-client one-shot "VLANe-Name" ports all print
https://gtacknowledge.extremenetworks.com/articles/Q_A/Which-commands-can-be-used-to-detect-a-loop

or

.. check the pkts/sec counter for high counters

show ports utilization

[MUNIR_ENG]

thank you