Cisco IOS DHCP Server configuration

Cisco IOS DHCP Server configuration: https://study-ccna.com/configure-cisco-router-as-dhcp-server/

Global configuration, not local to dhcp pool.

cisco_ios_sw(config)#ip dhcp excluded-address 192.168.0.1 192.168.0.47
cisco_ios_sw(config)#ip dhcp excluded-address 192.168.5.47

cisco_ios_sw(config)#ip dhcp pool YOUR_DHCP_POOLNAME
cisco_ios_sw(dhcp-config)#network 192.168.0.0 255.255.255.0
cisco_ios_sw(dhcp-config)#default-router 192.168.0.1
cisco_ios_sw(dhcp-config)#dns-server 192.168.0.1

show running-config

.../...
ip dhcp pool YOUR_POOL_NAME
 import all
 network 10.10.10.0 255.255.255.0
 default-router 10.10.10.1 
 domain-name YOUR_DOMAIN.COM
 dns-server 10.10.10.1 8.8.8.8
 lease 2
.../...

Static IPs:

You cannot configure manual bindings within the same pool that is configured with the networkcommand in DHCP pool configuration mode. See the "Configuring DHCP Address Pools" section for information about DHCP address pools and the network command.

.../...
ip dhcp pool STATIC_IP
host 192.168.184.183 255.255.255.0
hardware-address bce1.43d4.16b1
default-router 192.168.183.1
dns-server x.170.119.9 x.170.119.19 8.8.8.8 8.8.4.4
.../...

Commands

• show ip dhcp pool or show ip dhcp pool <name>
• show ip dhcp binding
• show ip dhcp server statistics
• show dhcp server
• show ip dhcp conflict
• lease (duration of the lease in days )
• lease infinite
• nbtstat
• debug ip dhcp server packet
• debug ip dhcp server

Activities

• Read verify and troubleshooting DHCP configuration: https://www.ciscopress.com/articles/article.asp?p=1574301&seqNum=6
• Read https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/xe-3se/3850/dhcp-xe-3se-3850-book/config-dhcp-server.html#GUID-0EF9A43F-98F1-4FD4-B232-151508AD397C

Related terms

• client-identifier
• Jun 6 14:50:40.456: %DHCPD-4-PING_CONFLICT: DHCP address conflict: server pinged 10.10.xxx.xxx.

See also

• DHCP: Cisco IOS DHCP Server, isc-dhcp-server (dhcpd.conf), ip dhcp pool show ip dhcp pool, show ip dhcp binding, show ip dhcp conflict, show ip dhcp server statistics, DHCP snooping, client-identifier, hardware-address, show ip dhcp, ip link, dhcpcd, AWS::EC2::DHCPOptions, dhclient, systemd-networkd
• Configure a DHCP server for your network

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/12-2sx/dhcp-12-2sx-book/config-dhcp-client.html#GUID-BCEB43D4-8C44-4C86-BBAA-6B977196D35C

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr/command/ipaddr-cr-book/ipaddr-l1.html#wp3986925401