Westermo MDI-112-F4G - Manual (Page 40)

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DHCP Leased Entries: the switch provides an assigned IP address list for user
check. It will show the MAC and IP address that was assigned by the switch. Click
the Reload button to refresh the listing.
DHCP Relay Agent
You can select to Enable or Disable DHCP relay agent function, and then select
the modification type of option 82 field, circuit ID, remote ID.