Dynamic Host Configuration Protocol for IPv4 (DHCPv4) streamlines network administration by automatically assigning IP addresses and providing network configuration information to devices within a network.
In this blog post, we’ll explore how to configure a DHCPv4 server on R1 and set up R2 as a DHCPv4 client. We’ll also verify the DHCPv4 settings and examine DHCPv4 server statistics.
Network topology
The network topology we will be making use of in this post is shown below. As you can see, it consists of two routers. Router 1 and Router 2. We will configure Router 1 as the DHCP server and Router 2 as the DHCPv4 client.
DHCPv4 Server and Client Configuration Steps
Here are the steps to configure DHCPv4 on the network above:
Step 1: Configure Router 1 as DHCPv4 Server
As stated in the network topology, we will configure Router 1 as a DHCPv4 server.
Firstly, configure the interface of the router.
R1(config)#interface ethernet0/0
R1(config-if)#ip address 192.168.12.1 255.255.255.0
R1(config-if)#no shutdown
Then configure Router1 as the DHCPv4 server.
R1(config)#ip dhcp excluded-address 192.168.12.1 192.168.12.10
R1(config)#ip dhcp pool LAN
R1(dhcp-config)#network 192.168.12.0 /24
R1(dhcp-config)#default-router 192.168.12.1
R1(dhcp-config)#dns-server 1.1.1.1 1.0.0.1
R1(dhcp-config)#domain-name cisco.lab
R1(dhcp-config)#lease 1Here is a brief explanation of the above commands;
Line 1: <– Reserved the IP address pool from 192.168.12.1 to 192.168.12.10
Line 2: <– Create a DHCP pool
Line 3: <– Network number and mask
Line 4: <– Default Routers
Line 5: <– DNS Servers
Line 6: <– Domain name
Line 7: <– Address lease time
Step 2: Configure R2 as a DHCPv4 Client
R2(config)#interface ethernet0/0
R2(config-if)#ip address dhcp
R2(config-if)#no shutdownStep 3: Confirm the Configuration (Show commands)
Checking if Router2 Received an IP address from the server;
R2#show ip interface brief
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 192.168.12.11 YES DHCP up up
Ethernet0/1 unassigned YES unset administratively down down
Ethernet0/2 unassigned YES unset administratively down down
Ethernet0/3 unassigned YES unset administratively down downMore Details about Router2’s ethernet0/0 interface
R2#show ip interface ethernet0/0
Ethernet0/0 is up, line protocol is up
Internet address is 192.168.12.11/24 <-- ethernet0/0 has been assigned the IP address 192.168.12.11/24 via DHCP server.
Broadcast address is 255.255.255.255
Address determined by DHCP
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is enabled
IP CEF switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
Input features: MCI Check
IPv4 WCCP Redirect outbound is disabled
IPv4 WCCP Redirect inbound is disabled
IPv4 WCCP Redirect exclude is disabledChecking the gateway and default route
R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is 192.168.12.1 to network 0.0.0.0
S* 0.0.0.0/0 [254/0] via 192.168.12.1 <-- Default Route and Next hop gateway
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, Ethernet0/0
L 192.168.12.11/32 is directly connected, Ethernet0/0
Checking what is Primary DNS, Secondary DNS and Domain name
R2#show ip dns view
DNS View default parameters:
Logging is off
DNS Resolver settings:
Domain lookup is enabled
Default domain name: cisco.lab <-- Domain name
Domain search list:
Lookup timeout: 3 seconds
Lookup retries: 2
Domain name-servers:
1.1.1.1 <-- Primary DNS
1.0.0.1 <-- Secondary DNS
DNS Server settings:
Forwarding of queries is enabled
Forwarder timeout: 3 seconds
Forwarder retries: 2
Forwarder addresses:On Router 1
Check on R1 the DHCP IP binding
R1#show ip dhcp binding
Bindings from all pools not associated with VRF:
IP address Client-ID/ Lease expiration Type
Hardware address/
User name
192.168.12.11 0063.6973.636f.2d61. Dec 14 2023 08:56 AM Automatic
6162.622e.6363.3030.
2e32.6130.302d.4574.
302f.30Check on R1 the DHCP Statistics
R1#show ip dhcp server statistics
Memory usage 32643
Address pools 1
Database agents 0
Automatic bindings 1
Manual bindings 0
Expired bindings 0
Malformed messages 0
Secure arp entries 0
Message Received
BOOTREQUEST 0
DHCPDISCOVER 1
DHCPREQUEST 1
DHCPDECLINE 0
DHCPRELEASE 0
DHCPINFORM 0
Message Sent
BOOTREPLY 0
DHCPOFFER 1
DHCPACK 1
DHCPNAK 0Related:
How to Configure DHCP on Layer 2 Switch in Packet Tracer
How to Configure DHCP on Layer 3 Switch In Packet Tracer
Reference: https://github.com/misterkrittin/CCNA-Labs
Related content;
How to Configure DHCP Server For Multiple VLANS in Packet Tracer
How to Configure DHCP Snooping In Cisco Packet Tracer
How to Configure DHCP on Layer 2 Switch in Packet Tracer
How to Configure DHCP Relay Agent on Layer 3 Switch
How to Configure DHCP on Layer 3 Switch In Packet Tracer
I am a passionate Networking Associate specializing in Telecommunications.
With a degree in Electronic engineering, I possess a strong understanding of electronic systems and the intricacies of telecommunications networks. I gained practical experience and valuable insights working for a prominent telecommunications company.
Additionally, I hold certifications in networking, which have solidified my expertise in network architecture, protocols, and optimization.
Through my writing skills, I aim to provide accurate and valuable knowledge in the networking field.
Connect with me on social media using the links below for more insights.
You can contact me using [email protected] or connect with me using any of the social media account linked below