D-Link xStack DGS-3420 Series Reference Manual page 306

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
Roaming State
Trap / Log
DHCP Snooping (IPv4)
DHCP Snooping (IPv6)
ND Snooping
Recover Learning Ports
File Name
Address Binding DHCP
Snooping Entry File
Auto Save
Figure 8-25 IMPB Global Settings
Description
Select to enable or disable the roaming state. When IMPB roaming is enabled, the
dynamic authenticated MAC address which learned through DHCP/ND snooping on
specific port can change to another port if it detects (1) a new DHCP process belong to
same IP and MAC address or (2) a new DAD process belong to same IP and MAC.
Click the radio buttons to enable or disable the sending of trap/log messages for IP-
MAC-port binding. When Enabled, the Switch will send a trap message to the SNMP
agent and the Switch log when an ARP/IP packet is received that doesn't match the IP-
MAC-port binding configuration set on the Switch. The default is Disabled.
Click the radio buttons to enable or disable DHCP snooping (IPv4) for IP-MAC-port
binding. The default is Disabled.
Click the radio buttons to enable or disable DHCP snooping (IPv6) for IP-MAC-port
binding. The default is Disabled.
Click the radio buttons to enable or disable enable ND snooping on the Switch. The
default is Disabled.
Enter the port numbers used to recover the learning port state. Tick the All check box
to apply to all ports.
This option is used to download or upload DHCPv4 Snooping binding entries by TFTP.
Enter the file path, to the TFTP server, here. Alternatively, click on the Browse button
and navigate to the file located on the PC. Click the Download button to initiate the
download. Click the Upload button to initiate the upload.
This option is used to save the DHCPv4 snooping binding entries. Enter the filename
here. Note: This feature is only supported on devices that support external memory
(e.g. SD card).
Select to enable or disable the automatic save option.
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