How to configure a DHCP server on Cisco

Cisco routers and switches are capable to act as a DHCP server. In the example configuration below is show how this can be configured.

Configuring DHCP:

service dhcp
!
!
interface vlan1
 ip address 10.100.0.1 255.255.255.0
!
!
ip dhcp excluded-address 10.100.0.1 10.100.0.99
ip dhcp excluded-address 10.100.0.201 10.100.0.255
!
!
ip dhcp pool pool_vlan1
 network 10.100.0.0/24
 default-router 10.100.0.1
 dns-server 10.100.0.11 10.100.0.12
!

It is possible to configure more IP DHCP pools for different IP ranges. Also can a Cisco device act as DHCP server for network which are not directly connected.


Vulnerability Announcements
Multiple Vulnerabilities in Cisco Unified IP Phones 7900 Series

Default Credentials Vulnerability in Cisco Network Registrar

Cisco RVS4000 and WRVS4400N Web Management Interface Vulnerabilities

Cisco Content Services Gateway Denial of Service Vulnerability

Multiple Vulnerabilities in Cisco AnyConnect Secure Mobility Client

Cisco SA 500 Series Security Appliances Web Management Interface Vulnerabilities

Cisco ASR 9000 Series Routers Line Card IP Version 4 Denial of Service Vulnerability

Field Notices
(Cisco CRS Series Routers) Field Notice: FN - 63126 - CRS: 1OC768-ITU/C cards may experience High Bit Error Rate (BER) or loss of Transmit power incidents in certain batch of optical module - Workaround Fix on Failure

(Cisco CRS Series Routers) Field Notice: FN - 63046 - CRS - 1OC768-POS-SR cards May Experience Bit Error Rate (BER) Incidents Due to Onboard Short - Fix on Failure

(Cisco MGX 8800 Series Switches) Field Notice: FN - 63319 - MGX - VXSM-SW May Report Error Code 400 for CAS Signaling Call - Workaround Available

(Cisco 7800 Series Media Convergence Servers) Field Notice: FN - 63324 - A Limited Number of HP DL380-G6 Servers Shipped Prior to November 16, 2009 May Unexpectedly Reboot

(Cisco 800 Series Routers) Field Notice: FN - 63343 - PCEX-3G-HSPA-R6 Modem not Recognized in Cisco IOS 15.1(1)T of Cisco 880G Series Router - Cisco IOS Upgrade Required

(Cisco MDS 9500 Series Multilayer Directors) Field Notice: FN - 63132 - MDS9000 - Potential DIMM Memory Issue in a Small Number of DS-X9530-SF2-K9 Supervisor Cards Manufactured Between September 2007 and February 2008