Switch Port vlan Mode

Switch Port vlan mode Ø the Acess port receives a packet to determine whether there is any VLAN information: If there is no vlan information, the PVID of the port is entered and the switch is forwarded. If yes, the packets are discarded directly (default) Ø send packets on the Acess port: the VLAN information of the packets is stripped and directly sent out (therefore, the Access port can implement host communication under the same VLAN on the same switch; the default VLAN1 Packet Exchange during vswitch-level connection is also possible, but VLAN passthrough is not supported .) Ø trunk Port Receiver: receives a packet and determines whether there is VLAN information. If yes, it determines whether the trunk port allows data from the VLAN to enter. If yes, it forwards the packet; otherwise, it is discarded; if no VLAN information is available, the PVID of the port is configured and forwarded. Ø send packets on the trunk port: Compare the VLAN information of the packet to be sent with the PVID of the port. If not, send the packets directly. If the two are equal, the VLAN information is stripped and then sent. (So, after you set all the vswitch-level ports to Trunk and allow all VLANs to pass through, the VLAN2-VLAN4000 is directly passthrough, and VLAN1 is because it is the same as the Trunk default PVID, you need to remove VLAN information and add VLAN information to implement passthrough. If you change the default PVID of the Trunk, the VLAN-X under a switch can communicate with the VLAN-Y under another switch.