Port Security can also mitigate spoofing attacks by limiting access through each switch port to a single MAC address. If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the device attached to that port has the full bandwidth of the port. When you assign secure MAC addresses to a secure port, the port does not forward ingress traffic that has source addresses outside the group of defined addresses. Port Security restricts a port’s ingress traffic by limiting the MAC addresses that are allowed to send traffic into the port. “Sticky learning” combines dynamically learned and statically configured addresses. Port security is configured on untrusted user ports. You can use port security with dynamically learned and static MAC addresses. It’s a Cisco-proprietary feature on Catalyst switches (disabled by default). Enabling port security limits MAC flooding attacks and locks down the port.Ĭonfigure port security to define the number of MAC addresses allowed on a given port. To prevent MAC Address flooding, Port Security can be used. Once MAC addresses are assigned to a secure port, the port does not forward frames with source MAC addresses outside the group of defined addresses. Port Security on interfaces that use voice VLANsīy limiting the number of permitted MAC addresses on a port, port security can be used to control unauthorized expansion of the network. Last Source Address:Vlan : 0xxx.xx.Mitigating MAC Spoofing and MAC Table Overflow Attacks To me sticky and static are options where we want to restrict only certain devices to be connected to our network, however it may lead to significant shutdown of ports, which option do u recommed to LAN around 700 devices. Please correct me if I am wrong ? Which port security would u recommend to IP phones setup if we dont want any one to allow any device other than company assets. With three address allowed one can disconnect IP phone and connect two pcs using HUB. However with sticky only those devices were allowed which were learnt i.e. With dynamic port security, I was able to disconnect one device and able to connect other one.
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