Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 21
DNS Proxy: When DNS proxy is enabled, system will relay DNS requests to the currently configured DNS server,
and reply as a DNS resolver to the client devices on the network. Only IPv4 DNS proxy is now supported.
IP Interfaces
DHCP Per Port Mode: Enable/Disable DHCP per port.
DHCP Per Port IP: Define the IP range for DHCP per port.
Delete: Select this option to delete an existing IP interface.
VLAN: The VLAN associated with the IP interface. Only ports in this VLAN will be able to access the IP interface.
This field is only available for input when creating a new interface.
IPv4 DHCP Enabled: Enable the DHCPv4 client by checking this box. If this option is enabled, the system will
configure the IPv4 address and mask of the interface using the DHCPv4 protocol.
DHCPv4 Client ID Type: Specify which of the four Client Identifier types below (Auto, IF_MAC, ASCII, or HEX) to
use for the Client Identifier. See IETF RFC-2132 section 9.14. This option is used by DHCP clients to specify their
unique identifier. DHCP servers use this value to index their database of address bindings. This value is expected
to be unique for all clients in an administrative domain.
Auto: The Client Identifier is set automatically (default).
IPv4 DHCP Client ID IfMac: The interface name of the DHCP client identifier. When DHCPv4 client is
enabled and the client identifier type is ' IF_MAC ', the configured interface's hardware MAC address will
be used in the DHCP option 61 field.
IPv4 DHCP Client ID ASCII: The ASCII string of the DHCP client identifier. When DHCPv4 client is enabled
and the client identifier type is 'ASCII', the ASCII string will be used in the DHCP option 61 field.
IPv4 DHCP Client ID HEX: The hexadecimal string of the DHCP client identifier. When the DHCPv4 client
is enabled and the client identifier type 'HEX', the hexadecimal value will be used in the DHCP option 61
field.
IPv4 DHCP Hostname: The hostname of DHCP client. If a DHCPv4 client is enabled, the configured hostname will
be used in the DHCP option 12 field. When this value is an empty string, the field uses the configured system
name plus the latest last three bytes of the system MAC address as the hostname.
IPv4 DHCP Fallback: The Timeout in seconds for trying to obtain a DHCP lease. After this period expires, a
configured IPv4 address will be used as IPv4 interface address. A value of zero disables the fallback mechanism,
such that DHCP will keep retrying until a valid lease is obtained. Legal values are 0 to 4294967295 seconds.
IPv4 DHCP Current Lease: For DHCP interfaces with an active lease, this column shows the current interface
address, as provided by the DHCP server.
IPv4 Address: The IPv4 address of the interface in dotted decimal notation. If DHCP is enabled, this field
configures the fallback address. The field may be left blank if IPv4 operation on the interface is not desired - or no
DHCP fallback address is desired.
IPv4 Mask: The IPv4 network mask, in number of bits (prefix length). Valid values are between 0 and 30 bits for a
IPv4 address. If DHCP is enabled, this field configures the fallback address network mask. The field may be left
blank if IPv4 operation on the interface is not desired - or no DHCP fallback address is desired.
DHCPv6 Enable: Enable the DHCPv6 client by checking this box. If this option is enabled, the system will
configure the IPv6 address of the interface using the DHCPv6 protocol.
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