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
.../...

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/command/ipaddr-cr-book/ipaddr-l1.html#wp3986925401