modified on 5 maj 2011 at 10:57 ••• 5 885 views

IP/Klient DHCP

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Dla RouterOS:
v3, v4 +

Spis treści

Summary

The MikroTik RouterOS DHCP client may be enabled on any Ethernet-like interface at a time. The client will accept an address, netmask, default gateway, and two dns server addresses. The received IP address will be added to the interface with the respective netmask. The default gateway will be added to the routing table as a dynamic entry. Should the DHCP client be disabled or not renew an address, the dynamic default route will be removed. If there is already a default route installed prior the DHCP client obtains one, the route obtained by the DHCP client would be shown as invalid.

Quick setup example

Add a DHCP client on ether1 interface:

/ip dhcp-client add interface=ether1 disabled=no

After interface is added, you can use rint" or "print detail" command to see what parameters DHCP client acquired:

[admin@MikroTik] ip dhcp-client> print detail
Flags: X - disabled, I - invalid 
 0   interface=ether1 add-default-route=yes use-peer-dns=yes use-peer-ntp=yes
     status=bound address=192.168.0.65/24 gateway=192.168.0.1
     dhcp-server=192.168.0.1 primary-dns=192.168.0.1 primary-ntp=192.168.0.1
     expires-after=9m44s 
[admin@MikroTik] ip dhcp-client>

Plik:Icon-note.png

Przypis: If interface used by DHCP client is part of VRF configuration, then default route and other received routes from DHCP server will be added to VRF routing table.


Properties

Sub-menu: /ip dhcp-client


Property Description
add-default-route (yes Szablon:! no; Default: yes) Whether to install default route in routing table received from dhcp server.
client-id (string; Default: ) Corresponds to the settings suggested by the network administrator or ISP. If not specified, client's MAC address will be sent
default-route-distance (integer:0..255; Default: ) Distance of default route. Applicable if add-default-route is set to yes.
host-name (string; Default: ) Host name of the client sent to a DHCP server. If not specified, client's system identity will be used.
interface (string; Default: ) Interface on which DHCP client will be running.
use-peer-dns (yes Szablon:! no; Default: yes) Whether to accept the DNS settings advertised by DHCP Server. (Will override the settings put in the /ip dns submenu.
use-peer-ntp (yes Szablon:! no; Default: yes) Whether to accept the NTP settings advertised by DHCP Server. (Will override the settings put in the /system ntp client submenu)


Status

Command /ip dhcp-client print detail will show current status of dhcp client and read-only properties listed in table below:


Property Description
address (IP/Netmask) IP address and netmask, which is assigned to DHCP Client from the Server
dhcp-server (IP) IP address of the DHCP server.
expires-after (time) Time when the lease expires (specified by the DHCP server).
gateway (IP) IP address of the gateway which is assigned by DHCP server
invalid (yes Szablon:! no) Shows whether configuration is invalid.
netmask (IP)
primary-dns (IP) IP address of the primary DNS server, assigned by the DHCP server
primary-ntp (IP) IP address of the primary NTP server, assigned by the DHCP server
secondary-dns (IP) IP address of the secondary DNS server, assigned by the DHCP server
secondary-ntp (IP) IP address of the secondary NTP server, assigned by the DHCP server
status (bound Szablon:! error Szablon:! rebinding... Szablon:! requesting... Szablon:! searching... Szablon:! stopped) Shows the status of DHCP Client


Menu specific commands

Property Description
release (numbers) Release current binding and restart DHCP client
renew (numbers) Renew current leases. If the renew operation was not successful, client tries to reinitialize lease (i.e. it starts lease request procedure (rebind) as if it had not received an IP address yet)


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