Airlive POE-GSH2404M handleiding
Handleiding
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14.8.3 Option82 Property
Private DHCP Servers in the network may lead to wrong IP addresses obtained by
users. DHCP Snooping security mechanism based on PS7024 Ethernet switch divides the
ports into Trust Port and Untrust Port in order to provide the IP addresses through legal
DHCP Servers.
● Trust Port directly or indirectly connects legal DHCP Server. It ensures the correct
IP address for DHCP Client by forwarding the DHCP messages received.
● Untrust Port connects illegal DHCP servers. DHCP ACK and DHCPOFFER
messages responded by DHCP Server on untrusted ports will be discarded to prevent
incorrect IP addresses.
Option 82 is the Relay Agent Information Option in DHCP messages, which records the
location of DHCP Client. When the DHCP relay (or DHCP Snooping device) receives
the request, message sent from DHCP Client to DHCP Server, administrators can add
the Option 82 to locate the DHCP Client and control the security, cost, etc. More flexible
approaches to address allocation are created by the servers supporting Option 82 in line
with the IP addresses and other parameters allocation policies.
Up to 255 sub-options are contained in the Option 82. At least one sub-option should be
defined if Option 82 is defined. The current device supports 2 sub-options: Circuit ID Sub-
option and Remote ID Sub-option
Manufacturers usually fill options as needed since RFC 3046 fails to uniform the Option 82
options. As the DHCP relay device, Ethernet switch supports the extended padding formats
for Option 82 sub-options and the padding defaults are as follows:
● Sub-option 1: VLAN No. and port index (port physical number minuses 1) of the
port receiving the Request message sent by DHCP Client.
● Sub-option 2: bridge MAC address of DHCP relay device receiving the DHCP
Client Request message.
Sub-option 1: VLAN No. and port index (port physical number minuses 1) of the port
receiving the Request message sent by DHCP Client as follows.
Sub-option 2: bridge MAC address of DHCP relay device receiving the
DHCPREQUEST message of DHCP Client.
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Productinformatie
| Merk | Airlive |
| Model | POE-GSH2404M |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 72641 MB |
