Configure Static Routing IPv4 with Next Hop IP

Static routing is an essential concept in networking that enables manual configuration of routes to control traffic between different networks. In this guide, we’ll demonstrate how to configure static routing using next-hop IP addresses based on the topology provided.

Static Routing IPv4

1. Configure Static Routing IPv4 with Next Hop IP
2. Configure Static Routing IPv4 with Exit Interface (Point to Point – Serial Interface)
3. Configure Static Routing IPv4 with Fully Specified Route

Network Topology Overview

The topology consists of:

1. Two Routers (R1 and R2):
   • Connected via the 192.168.30.0/24 network.
2. Four Subnets attached to the routers:
   • 192.168.10.0/24 (PC10)
   • 192.168.20.0/24 (PC20)
   • 192.168.40.0/24 (PC40)
   • 192.168.50.0/24 (PC50)

IP Address Assignments

Configuration of Routers

Static routes will be configured using the next-hop IP to ensure connectivity between networks.

Router R1 Configuration

1. Set Hostname:

   Router>enable
   Router#configure terminal
   Router(config)#hostname R1
   

2. Configure Interfaces:
   • Gig0/0/1 (connected to 192.168.10.0/24):

     R1(config)#interface gigabitEthernet 0/0/1
     R1(config-if)#no shutdown
     R1(config-if)#ip address 192.168.10.1 255.255.255.0
     

   • Gig0/0/2 (connected to 192.168.20.0/24):

     R1(config)#interface gigabitEthernet 0/0/2
     R1(config-if)#no shutdown
     R1(config-if)#ip address 192.168.20.1 255.255.255.0
     

   • Gig0/0/0 (connected to 192.168.30.0/24 – R2):

     R1(config)#interface gigabitEthernet 0/0/0
     R1(config-if)#no shutdown
     R1(config-if)#ip address 192.168.30.1 255.255.255.0
     

3. Configure Static Routes: To enable communication with the networks on R2 (192.168.40.0/24 and 192.168.50.0/24), static routes are added using the next-hop IP (192.168.30.2):

   R1(config)#ip route 192.168.40.0 255.255.255.0 192.168.30.2
   R1(config)#ip route 192.168.50.0 255.255.255.0 192.168.30.2
   

Router R2 Configuration

1. Set Hostname:

   Router>enable
   Router#configure terminal
   Router(config)#hostname R2
   

2. Configure Interfaces:
   • Gig0/0/1 (connected to 192.168.40.0/24):

     R2(config)#interface gigabitEthernet 0/0/1
     R2(config-if)#no shutdown
     R2(config-if)#ip address 192.168.40.1 255.255.255.0
     

   • Gig0/0/2 (connected to 192.168.50.0/24):

     R2(config)#interface gigabitEthernet 0/0/2
     R2(config-if)#no shutdown
     R2(config-if)#ip address 192.168.50.1 255.255.255.0
     

   • Gig0/0/0 (connected to 192.168.30.0/24 – R1):

     R2(config)#interface gigabitEthernet 0/0/0
     R2(config-if)#no shutdown
     R2(config-if)#ip address 192.168.30.2 255.255.255.0
     

3. Configure Static Routes: To enable communication with the networks on R1 (192.168.10.0/24 and 192.168.20.0/24), static routes are added using the next-hop IP (192.168.30.1):

   R2(config)#ip route 192.168.10.0 255.255.255.0 192.168.30.1
   R2(config)#ip route 192.168.20.0 255.255.255.0 192.168.30.1
   

Verification of Static Routing

Once the configurations are complete, verify connectivity between networks:

1. Ping from PC10 (192.168.10.10) to PC50 (192.168.50.10):

   > ping 192.168.50.10
   

   The ping should be successful if routing is configured correctly.

2. Check Routing Tables: On R1:

   R1#show ip route
   

   On R2:

   R2#show ip route
   

Key Points to Remember

1. Next-Hop IP: When configuring static routes, always ensure the next-hop IP is reachable. For example, on R1, the next-hop IP for networks on R2 is 192.168.30.2.
2. Subnet Mask: Ensure that subnet masks are consistent and correctly configured across all interfaces.
3. Interface Status: All interfaces must be enabled (using no shutdown) for successful communication.
4. Testing: Always verify connectivity between devices after completing the configuration.

This concludes the step-by-step guide on configuring static routing with next-hop IP for IPv4. With proper static routing, seamless communication across networks is achievable, providing a robust foundation for managing and troubleshooting routed networks.