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Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
show ip dhcp lease
Displays lease information about the dynamic IP address currently assigned to a DHCP client-enabled interface.
Syntax
show ip dhcp lease[interface type slot/port]
Parameters
interface type
slot/port
Display DHCP client statistics on the specified interface.
● For the management interface on the stack-unit, enter the keyword
managementethernet followed by slot/port information. The slot and port
range is 0.
● For a VLAN, enter the keyword vlan followed by a number from 1 to 4094.
Command Modes EXEC Privilege
Supported Modes All Modes
Default Display DHCP lease information on all DHCP client-enabled interfaces on the switch.
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
Commands to Configure Secure DHCP
DHCP, as defined by RFC 2131, provides no authentication or security mechanisms. Secure DHCP is a suite of features that
protects networks that use dynamic address allocation from spoofing and attacks.
arp inspection
Enable dynamic arp inspection (DAI) on a VLAN.
Syntax
arp inspection
Defaults Disabled
Command Modes INTERFACE VLAN
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Related
Commands
arp inspection-trust — specifies a port as trusted so that ARP frames are not validated against the
binding table.
408 Dynamic Host Configuration Protocol