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?

[Patrick_Voss]

All of them. This will give you the best chance of finding the loop if there is one in the future.

[MUNIR_ENG]

in which switch i would do configure elrp. the switch that has the problem?

[MUNIR_ENG]

yes you are right, i think got on broadcast in network

[Dorian_Perry]

Hi Munir,

Yes, considering the time delay of the issue, this is more likely to be a broadcast storm. If you connect a PC to one of the switches and assign it to the same VLAN experiencing the issue, a Wireshark packet capture should help in tracking down the source of the broadcast traffic.

[Patrick_Voss]

How are you confirming there is a loop in the network? Loops usually present themselves instantly so it is odd it takes an hour.

If you could give us a brief topology that would be helpful as well.