The relevant knowledge points of VLAN frame format:
The four-byte 802.1Q tag header contains 2 bytes of tag protocol identification (TPID) and 2 bytes of tag control information (TCI).
The relevant knowledge points of VLAN frame format:
The four-byte 802.1Q tag header contains 2 bytes of tag protocol identification (TPID) and 2 bytes of tag control information (TCI).
The tag message structure is added after the source mac address and destination mac address With 4bytes of vlan information, ordinary PC network cards cannot recognize it.
Access ports belong
AccessPort:
General connection host
Only those with this port are allowedPVIDsameVLANPassed, receiveduntaggedThe data frame is mandatory to be marked with this portPVIDlabel ;
Tru
I. Concept
1, Trunk port, the trunk port can transmit multiple VLANs at the same time Packets are generally used for links between switches.
2, Hybrid port. The Hybrid port can transmit
Reposted from: https://www.cnblogs.com/keyi/p/5953649.html I believe that when beginners develop SVN as version management, it is estimated that it is impossible to consider how to use SVN flexi
Untag just ordinary ethernet message, ordinary PC The network card of the PC can recognize such messages for communication. Tag The change of message structure is in the source mac address and Pur