Chapter 4: Web management
44
NS3550-8T-2S Industrial Managed Switch User Manual
• Click
Reset
to undo any changes made locally and revert to previously saved
values.
UPnP
UPnP is an acronym for Universal Plug and Play. The goals of UPnP are to allow
devices to connect seamlessly and to simplify the implementation of networks in home
(data sharing, communications, and entertainment) and corporate environments for
easy installation of computer components. Configure UPnP on the UPnP Configuration
page.
This page includes the following fields:
Object
Description
Mode
Indicates the UPnP operation mode. Possible modes are:
Enabled
: Enable UPnP mode operation.
Disabled
: Disable UPnP mode operation.
When the mode is enabled, two ACEs are added automatically to trap UPnP
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.