Default Configuration in newer switchesĬ. Is a Cisco implementation of STP that provides a separate spanning-tree instance for each configured VLAN in the network.ġ. It does not participate in spanning tree, and it does not forward frames. Disabled: In this state, a port is administratively shut down. It sends and receives frames and also sends and receives BPDUs.ĥ. It is considered as part of the active topology. Forwarding: After another period of time (forward delay) in learning state, the port is moved to forwarding state. A port in this state cannot send any data frames.Ĥ.
Ncc integrity plus mac#
The port still sends and receives BPDUs in addition, it can learn and add new MAC addresses to its table. Learning: After a period of time (forward delay) in listening state, the port is moved to learning state. But it is allowed to send and receive BPDUs, so it is participating in active topology.ģ. The port in this state still cannot send or receive data frames. Listening: A port is moved from blocking to listening state if there is a possibility to be selected as the root or designated port. A port in this state is a nondesignated port, and therefore it does not participate in active topology.Ģ. A port in this state cannot receive or transmit data, but it receives BPDUs, so the switch can hear from its neighbor switches and determine the location, and root ID, of the root switch and port roles of each switch.
Blocking: In this state, the port ensures that no bridging loops occur.
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