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DHCP Client and DHCP Server interactive processes
DHCP Snooping supports adding, transmitting and managing Option 82. Option 82 is a DHCP
option, and used to record information about the DHCP client location.
The Administrator can locate DHCP client via this option, and exercise security controls - for
example, to limit the number of IP addresses that a port or VLAN can allocate. According to
different types of DHCP packets, the processing modes for Option 82 are different:
1.
After the device receives a DHCP request packet, the packet is processed according to
Option 82 and the processing policy configured by users and the fill mode. The
processed packet is transmitted to the DHCP server.
2.
When a device is receiving a responding packet of DHCP server, if the packet has
Option 82, then Option 82 is deleted and the packet transmitted to a DHCP client. If
the packet does not have Option 82, then the packet is transmitted directly to a DHCP
client.
Содержание 065-7434
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Страница 245: ...245 SIGNAMAX LLC www signamax eu Application Example Example of configuring DHCP Snooping ...
Страница 302: ...302 SIGNAMAX LLC www signamax eu Default status no switching interface ...
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Страница 655: ...287 SIGNAMAX LLC www signamax eu Sub VLAN members in the system ...