D-Link xStack DGS-3120 Series Reference Guide

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
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Figure 3-16 Loopback Interface Settings - Add/Edit window
The fields that can be configured are described below:
Parameter Description
Interface Name
The name of the loopback interface. The loopback interface has the same name
domain space as the regular interface. So the name can’t be a duplicate of any of the
regular interfaces.
IPv4 Address
Enter a 32-bit IPv4 address for the loopback interface.
Subnet Mask
Enter a subnet mask to be applied to the loopback interface.
Interface Admin State
Use the drop-down menu to enable or disable the loopback interface.
Click the <<Back button to discard the changes made and return to the previous page.
Click the Apply button to accept the changes made for each individual section.
Management Settings
Users can stop the scrolling of multiple pages beyond the limits of the console when using the Command Line
Interface.
This window is also used to enable the DHCP auto configuration feature on the Switch. When enabled, the Switch
is instructed to receive a configuration file from a TFTP server, which will set the Switch to become a DHCP client
automatically on boot-up. To employ this method, the DHCP server must be set up to deliver the TFTP server IP
address and configuration file name information in the DHCP reply packet. The TFTP server must be up and
running and hold the necessary configuration file stored in its base directory when the request is received from the
Switch. For more information about loading a configuration file for use by a client, see the DHCP server and/or
TFTP server software instructions. The user may also consult the Upload Log File window description located in
the Tools section of this manual.
If the Switch is unable to complete the DHCP auto configuration, the previously saved configuration file present in
the Switch’s memory will be used.
This window also allows the user to implement the Switch’s built-in power saving feature. When power saving is
enabled, a port which has a link down status will be turned off to save power to the Switch. This will not affect the
port’s capabilities when the port status is link up.
Users can also configure Password Encryption on the Switch.
To view the following window, click Management > Management Settings, as shown below:

D-Link xStack DGS-3120 Series Specifications

General

MAC Address Table	16K entries
Ports	10/100/1000BASE-T ports
VLANs	4094
Jumbo Frame	Up to 9KB
Power Supply	Internal power supply (depending on model)
Power over Ethernet (PoE)	No
Layer 3 Features	RIP
Quality of Service (QoS)	8 queues per port, DiffServ
Security Features	ACLs
Management	Web-based, CLI, SNMP
Operating Temperature	0°C to 40°C
Storage Temperature	-40°C to 70°C
SFP Ports	Combo 10/100/1000BASE-T/SFP ports and/or dedicated SFP/SFP+ ports (depending on model)