CTC Union GSW-3208M1, Руководство пользователя

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This page is used to configure DHCP Relay and DHCP Opti on 82 functions.
When DHCP relay mode operation is enabled, the agent forwards and transfers
DHCP messages between the clients and the server when they are not in the
same subnet domain. And the DHCP broadcast message won't be flooded for
security considerations.
When DHCP relay information mode operation is enabled, the agent inserts
specific information (option 82) into a DHCP message when forwarding to
DHCP server and removes it from a DHCP message when transferring to
DHCP client. It only works when DHCP relay operation mode is enabled.
The option 82 circuit ID format as "[vlan_id][module_id][port_no]". The first four
characters represent the VLAN ID, the fifth and sixth characters are the module
ID(in standalone device it always equal 0, in stackabl e device it means switch
ID). ), and the last two characters are the port number. For example, "00030108"
means the DHCP message receive form VLAN ID 3, switch ID 1, port No 8. And
the option 82 remote ID value is equal the switch MAC address.
When DHCP relay information mode operation is enabled, if agent receives a
DHCP message that already contains relay agent information it will enforce the
policy.
5). Configuration - Security - Network - IP Source Guard
5-1). Configuration - Security - Network - IP Source Guard - Configuration