how to configured two routers cisco 1841 with dynamic ip address with routing with steps

 Here is a simple step-by-step guide to configure two Cisco 1841 routers with dynamic IP addressing and routing using DHCP + RIP (dynamic routing).

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🔧 Network Example

PC1 ---- R1 -------- R2 ---- PC2
        (Fa0/0)   (Fa0/1)

Device	Interface	IP Type
R1 Fa0/0	LAN	DHCP Server
R1 Fa0/1	WAN	Static
R2 Fa0/0	LAN	DHCP Server
R2 Fa0/1	WAN	Static

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🧰 Step 1: Connect Devices

• Connect PC → Router using Ethernet cable

• Connect Router R1 → Router R2 using crossover cable

• Connect console cable to configure routers

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⚙️ Step 2: Configure Router R1

1. Enter configuration mode

enable
configure terminal

2. Configure LAN Interface (Fa0/0)

interface fastethernet0/0
ip address 192.168.1.1 255.255.255.0
no shutdown
exit

3. Configure WAN Interface (Fa0/1)

interface fastethernet0/1
ip address 10.0.0.1 255.255.255.252
no shutdown
exit

4. Configure DHCP on R1

ip dhcp pool LAN1
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 8.8.8.8
exit

Exclude gateway IP:

ip dhcp excluded-address 192.168.1.1

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⚙️ Step 3: Configure Router R2

1. Enter configuration mode

enable
configure terminal

2. Configure LAN Interface (Fa0/0)

interface fastethernet0/0
ip address 192.168.2.1 255.255.255.0
no shutdown
exit

3. Configure WAN Interface (Fa0/1)

interface fastethernet0/1
ip address 10.0.0.2 255.255.255.252
no shutdown
exit

4. Configure DHCP on R2

ip dhcp pool LAN2
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8
exit

Exclude gateway IP:

ip dhcp excluded-address 192.168.2.1

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🔁 Step 4: Configure Dynamic Routing (RIP)

👉 Configure on both routers

On R1:

router rip
version 2
no auto-summary
network 192.168.1.0
network 10.0.0.0
exit

On R2:

router rip
version 2
no auto-summary
network 192.168.2.0
network 10.0.0.0
exit

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💻 Step 5: Configure PCs

• Set PC1 and PC2 to DHCP (Automatic IP)

• They will receive IP addresses automatically

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✅ Step 6: Verify Configuration

Check IP:

show ip interface brief

Check routing:

show ip route

Test connectivity:

ping 192.168.2.1

From PC1 → Ping PC2 ✅

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🎯 Expected Result

• PC1 gets IP: 192.168.1.x

• PC2 gets IP: 192.168.2.x

• Both PCs can communicate using dynamic routing (RIP)

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🚀 Bonus Tips

• Use debug ip rip to troubleshoot

• Use show ip dhcp binding to check DHCP clients

• Save config:

write memory

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If you want, I can also give:
✅ Packet Tracer file
✅ OSPF configuration (better than RIP)
✅ Full lab diagram with IP table

Just tell me 👍

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