Method for preventing MAC address cheat
A technology of MAC address and forwarding table entry, applied in the field of data communication, can solve the problems of complex configuration, MAC address site does not notify CPU processing, etc., to achieve the effect of solving complex configuration
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[0042] The invention sets the dynamic MAC address forwarding entry of the uplink port as static through the CPU system, and simulates the aging mechanism of the MAC address of the chip to perform aging processing on the MAC address forwarding entry whose port is the uplink port.
[0043] Since there is usually a HIT bit in each MAC address forwarding entry, it is used to indicate whether the entry is hit, that is, when the source MAC address and VLAN ID in the packet are the same as a MAC address forwarding entry , the HIT bit of the entry will be set.
[0044] The network switching chip will check the dynamic MAC address entry in the MAC address forwarding table according to the set aging time. If the HIT bit in the entry is set, the HIT bit will be cleared. After the HIT bit is cleared, if the When a packet with the same source MAC address and VLAN ID as the MAC address and VLAN ID of the table entry enters, the HIT bit of the table entry is reset; if the HIT bit has been re...
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