Ip dhcp inform – LevelOne GTL-2691 User Manual
Page 1363
C
HAPTER
46
| DHCP Commands
DHCP Client
– 1363 –
E
XAMPLE
Console(config)#interface vlan 2
Console(config-if)#ip dhcp client class-id hex 000099669966
Console(config-if)#
R
ELATED
C
OMMANDS
ip dhcp inform
This command submits a DHCP request for information about the default
domain name server and default gateway from a VLAN interface configured
with a static IPv4 address. Use the no form to stop this request.
S
YNTAX
[no] ip dhcp inform
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
◆
This command can only be issued for a VLAN interface which has been
configured with a static IPv4 address.
◆
The switch will continue sending DHCP inform requests until it receives
an acknowledgement from the server. If retry interval is larger than 60
seconds, the switch will stop sending requests, record a log entry, and
then wait for another 300 seconds before trying again.
◆
When the server receives a DHCP inform request, it will return the
requested optional information to the host without assigning an IP
address. If there is no option 6 (DNS) in the DHCP acknowledgement,
the switch will delete all configured name servers. If there is more than
one gateway address in option 3 (default gateway), the switch will use
the first entry.
◆
If the interface address is changed to another static IP address in a
different subnet, the DHCP inform request should be sent again.
E
XAMPLE
In the following example, a static IP address is assigned to VLAN 1, and the
switch is then configured to start submitting DHCP inform requests.
Console(config)#interface vlan 1
Console(config-if)#ip address 192.168.0.99 255.255.255.0
Console(config-if)#ip dhcp inform
Console(config-if)#