Acess Port
Ticker: Determine if there is VLAN information: if there is no pvid on the upper port, and exchange forwarding, if there is a direct discard (default)
Text: The VLAN information of the message is stripped, sent directly out
Trunk Port
Ticker: Determine if there is VLAN information: if there is no pvid on the upper port, and exchange forwarding, if there is a judge whether the trunk port allows the data entry of the VLAN: if the message is allowed to carry the original VLAN tag forwarding, otherwise discard the message.
Text: Compare the Port's pvid and the VLAN information that will send the message, if the two are equal then stripped VLAN information, and then sent, otherwise the message will carry the original VLAN tag for forwarding.
Hybrid port
Ticker: Determine if there is VLAN information: if there is no pvid on the upper port, and exchange forwarding, if there is the hybrid port to determine whether to allow the VLAN data entry: If can be forwarded, otherwise discarded.
Text: 1, determine the properties of the VLAN on this port, 2, if the UNTAG is stripped VLAN information, and then sent, if the tag is compared to the port Pvid and the VLAN information will send the message, if the two are equal stripped VLAN information, and then sent, Otherwise the message will be forwarded with the original VLAN tag.
Reference: http://blog.csdn.net/jesseyoung/article/details/40047749
VLAN and switch port mode Access/trunk/hybrid
