xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
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DHCP Packet
By default, the DHCP packet with broadcast DA will be flooded. When set to disable,
the broadcast DHCP packet received by the specified port will not be forwarded in
strict mode. This setting is effective when DHCP snooping is enabled, in the case
when a DHCP packet which has been trapped by the CPU needs to be forwarded by
the software. This setting controls the forwarding behavior in this situation.
Enter the number of blocked entries on the port. The default value is 500.
Click the Apply button to accept the changes made.
IMPB Entry Settings
This window is used to create static IP-MAC-binding port entries and view all IMPB entries on the Switch.
To view this window, click Security > IP-MAC-Port Binding (IMPB) > IMPB Entry Settings as shown below:
Figure 8-27 IMPB Entry Settings window
The fields that can be configured are described below:
Parameter Description
Click the radio button and enter the IP address to bind to the MAC address set below.
IPv6 Address
Click the radio button and enter the IPv6 address to bind to the MAC address set
Enter the MAC address to bind to the IP Address set above.
Ports
Specify the switch ports for which to configure this IP-MAC binding entry (IP Address
+ MAC Address). Tick the All Ports check box to configure this entry for all ports on
Click the Apply button to accept the changes made.
Click the Find button to locate a specific entry based on the information entered.
Click the Edit button to configure the specified entry.
Click the Delete button to remove the specified entry.
Click the View All button to display all the existing entries.
Click the Delete All button to remove all the entries listed.
MAC Block List
This window is used to view unauthorized devices that have been blocked by IP-MAC binding restrictions.
To view this window, click Security > IP-MAC-Port Binding (IMPB) > MAC Block List as shown below:
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