pixelpasob.blogg.se

1. #How to check mac address table in cisco switch full
2. #How to check mac address table in cisco switch password
3. #How to check mac address table in cisco switch mac

(config) spanning-tree portfast bpduguard default 8. You can also enable this globally on any port that has portfast enabled by running the following command, (config-if)# spanning-tree bpduguard enable This will ensure that if someone plugs a switch into this port and tries to place themselves as the root bridge the switch will place this port into a “blocking” state.īPDU guard ensures that no STP Protocol traffic (BPDU`s) are sent over ports that are designated as access ports. To guard against this you can use the guard root feature. Intruders can attempt to sabotage the root bridge role, changing the root bridge role can then allow them to force traffic over alternative STP path that is possible slower and also allow them to span traffic from the switch that they have forced to become the root bridge. Show port-security interface fastethernet 0/8 To enable port-security sticky the following command can be used : (config-if)# switchport port-security mac-address Learnt addresses are added to the switches configuration much the same as if you were to explicitly define the allowed address via the port security command, such as :

#How to check mac address table in cisco switch mac

Sticky MAC allows the configured number of mac address that enters the port to be assigned against it, any further MACs would be denied. Restrict – The same as protect mode but additionally generates a syslog message. Protect – Frames from MAC addresses other than the permitted addresses are dropped traffic from allowed addresses is permitted to pass normally. Shutdown (default) – The interface is transitioned to a state pf error-disable, that in turn blocks all traffic. (config-if)# switchport port-security violation shutdown (config-if)# switchport port-security maximum 1

#How to check mac address table in cisco switch full

Note : When you enter the default value the full command will not be displayed via a `show run` This can prevent potential CAM overflow attacks. PORT SECURITYĬisco provides the ability via the port-security commands to limit the amount of MAC address that can be populate the mac address table via a specific port. To ensure that a rogue device can not be plugged in and a trunk port formed (meaning all VLAN traffic would be sent out of this port) a switchport can be configured to be only set to access mode. Meaning that they can either be a trunk port or a access port depending on what you plug in. To disable CDP run the following command:īy default ports are set to dynamic desirable. This can be disabled unless otherwise required.ĬDP can be used as an attack vector. The console port is secured by setting a timeout value along with assigning the previously configured username and password.ī y default the HTTP server is enabled.

#How to check mac address table in cisco switch password

One password is used for the enable password and the other will later be assigned to the console port.