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Step Description Command Keys
9 Specify DNS server IPv4/IPv6
addresses list. The list is transmitted to
clients as part of DHCP option 6
(optionally).
esr(config-dhcp-server)# dns-
server <ADDR>
<ADDR> – DNS server IP
address, defined as
AAA.BBB.CCC.DDD where each
part takes values of [0..255].
You can specify up to 8 IP
addresses separated by
commas.
esr(config-ipv6-dhcp-server)# dns-
server <IPV6-ADDR>
<IPV6-ADDR> – DNS server
IPv6 address, defined as
X:X:X:X::X where each part
takes values in hexadecimal
format [0..FFFF]. You can
specify up to 8 IP addresses
separated by commas.
10 Specify maximum IP addresses lease
time (optionally).
If DHCP client requests the lease time
that exceeds a maximum value, the
time specified by the command will be
set.
esr(config-dhcp-server)# max-
lease-time <TIME>
<TIME> – maximal IP address
lease time, sets in format
DD:HH:MM, where:
DD – amount of days,
takes values of [0..364].
HH – amount of hours,
takes values of [0..23].
MM – amount of
minutes, takes the value
of [0 ..59].
Default value: 1 day
esr(config-ipv6-dhcp-server)#
max-lease-time <TIME>
11 Specify the lease time for which a client
will be given IP address (optionally).
This time will be used if a client did not
request the certain lease time.
esr(config-dhcp-server)# default-
lease-time <TIME>
<TIME> – maximal IP address
lease time, sets in format
DD:HH:MM, where:
DD – amount of days,
takes values of [0..364].
HH – amount of hours,
takes values of [0..23].
MM – amount of
minutes, takes the value
of [0 ..59].
Default value: 12 hours.
esr(config-ipv6-dhcp-server)#
default-lease-time <TIME>
12 Create supplier class identifier (DHCP
Option 60) (optionally).
esr(config)# ip dhcp-server
vendor-class-id <NAME>
<NAME> – carrier class
identifier, set by the string of up
to 31 characters.
esr(config)# ipv6 dhcp-server
vendor-class-id <NAME>
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