Cisco DHCP configuration

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This configuration will be applied to Cisco 1941 with EHWIC-3G-HSPA+7 card and Light Weigh Access Point.

Basic DHCP config

Configure Cisco router as DHCP SERVER

configure terminal
 service dhcp
 ip dhcp pool LMA-POOL
  network 192.168.100.0 255.255.255.0
  default-router 192.168.100.254
  dns-server 192.168.100.254 8.8.8.8
  domain-name lma.gateway
  lease 0 8 '<--- 8 hrs lease -- number represents: Days Hours Minutes ---'
ip dhcp excluded-address 192.168.100.1 192.168.100.10
ip dhcp excluded-address 192.168.100.240 192.168.100.255

Cisco router interface configured to obtain an IP Address from DHCP server

configure terminal
r1-basic(config)#int gi 0/0
r1-basic(config-if)#ip address dhcp
r1-basic(config-if)#no shutdown
r1-basic(config-if)#end

once ip is assigned you will see

*Sep  1 22:08:33.531: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Sep  1 22:08:34.531: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up

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