Dell N1100-ON, Справочное руководство

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Switch Management Commands
1889
DHCP Client Commands
Dell EMC Networking switches support an embedded DHCP client. Any IP
interface can use DHCP to obtain an IP address. The DHCP client can run
on multiple interfaces simultaneously.
For IPv4, an IP interface can either use manually configured addresses or be
enabled for DHCP. The options are mutually exclusive. When the operator
enables DHCPv4 on an IP interface, all manually configured IP addresses on
that interface are removed from the running configuration. When the
operator configures an IP address, the system automatically releases any IPv4
address assigned by a DHCP server and disables DHCPv4 on the interface.
For IPv6, DHCP can coexist with configured addresses. The operator may
enable DHCPv6 and configure IPv6 addresses on the same interface. Only a
single in-band interface can be configured as a DHCPv6 client.
DHCP is disabled by default on all in-band interfaces.
The DHCP client retains an IP address even if the IP interface goes down.
The client does not attempt to renew its IP address until the lease expires,
regardless of changes in link state.
The operator may renew or release an IP address at any time using the new
release dhcp and renew dhcp CLI commands (or web or SNMP equivalents).
When an IPv6 address is leased from a DHCP server, the address has a mask
length of 128. A local route for the network is only installed if the router
receives and accepts IPv6 router advertisements on the interface. Because
router advertisements are not accepted on a routing interface, a leased IPv6
address on a routing interface is not necessarily useful.
Commands in this Section
This section explains the following commands:
release dhcp –
renew dhcp show dhcp lease