Hi, the problem is like this, one port is switchport access vlan 10 was accidentally connected to a patch panel connected to switchport accesds vlan 20. The network went down and the error loopback was detected. We have around 20 VLANs on our core/L3 switch.
Port security on access ports should do the trick.
The problem still exists, however, if you have trunk ports configured for your IP-Phones and some user decides to plug the PC end of the phone back into the other patch in the wall. This is bad. And I have yet to find a good solution to this problem.
Inter-VLAN loops on trunk ports. Possibly storm-control could be of some help?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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