Chapter 4: Web configuration
NS3552-8P-2S-V2 User Manual
53
Object
Description
related packets to the CPU. The ACEs are automatically removed when the
mode is disabled.
TTL
The TTL value is used by UPnP to send SSDP advertisement messages. Valid
values are in the range from 1 to 255.
Advertising
Duration
The duration, carried in SSDP packets, is used to inform a control point or
control points how often it or they should receive a SSDP advertisement
message from this switch. If a control point does not receive any message
within the duration, it will think that the switch no longer exists. Due to the
unreliable nature of UDP, in the standard it is recommended that such
refreshing of advertisements to be done at less than one-half of the advertising
duration. In the implementation, the switch sends SSDP messages periodically
at the interval one-half of the advertising duration minus 30 seconds. Valid
values are in the range 100 to 86400.
Buttons
• Click
Save
to save changes.
• Click
Reset
to undo any changes made locally and revert to previously saved
values.
DHCP relay
DHCP Relay is used to forward and to transfer DHCP messages between the clients
and the server when they are not on the same subnet domain.
The DHCP option 82 enables a DHCP relay agent to insert specific information into a
DHCP request packets when forwarding client DHCP packets to a DHCP server and
remove the specific information from a DHCP reply packets when forwarding server
DHCP packets to a DHCP client. The DHCP server can use this information to
implement IP address or other assignment policies. Specifically, the option works by
setting two sub-options:
• Circuit ID (option 1). This sub-option should include information specific to which
circuit the request came in on.
• Remote ID (option 2). This sub-option is designed to carry information relating to the
remote host end of the circuit.
The definition of Circuit ID in the switch is four bytes in length and the format is
"vlan_id" "module_id" "port_no". The parameter of "vlan_id" is the first two bytes
representing the VLAN ID. The parameter of "module_id" is the third byte for the
module ID (in a standalone switch it always equals 0; in the switch it means switch ID).
The parameter of "port_no" is the fourth byte and it means the port number.
The remote ID is six bytes in length, and the value equals the DHCP relay agent’s MAC
address. Configure DHCP relay in the DHCP Relay Configuration page.
Summary of Contents for NS3552-8P-2S-V2
Page 1: ...NS3552 8P 2S V2 User Manual P N 1073552 EN REV B ISS 25JAN19 ...
Page 41: ...Chapter 3 Switch management NS3552 8P 2S V2 User Manual 39 ...
Page 73: ...Chapter 4 Web configuration NS3552 8P 2S V2 User Manual 71 ...
Page 147: ...Chapter 4 Web configuration NS3552 8P 2S V2 User Manual 145 ...
Page 511: ......
