1. Static Route

2. Identify Default gateway What is the default gateway for PC1 PC2 r1 r2 PC1PC2

3. Routing Table When all the connecting interfaces are ‘up’, the routing table : C 192.168.100.0 C192.168.10.1 C192.168.200.1 C – connected networks

4. Static route Needs three parameters Destination network Subnet mask default gateway address ROUTER(CONFIG)# ip route Example: ip route 192.168.100.0 255.255.255.0 192.168.20.1

5. Static route R1 does not know about Fa0/0 network R2 does not know about Fa0/1 network Static routes is set up to inform these routes R1(config)# ip route 192.168.10.0 255.255.255.0 192.168.200.1 R2(config)# ip route 192.168.100.0 255.255.255.0 192.168.200.2

6. Default Static Route Default route is to any destination, any subnet mask thru a gateway Default Route at R2 R2(config)# ip route 0.0.0.0 0.0.0.0 200.1.2.2 Internet 200.1.2.2/30.

7. IP Address Wastage How many addresses are wasted on 192.168.102.0/24 network? 254-20 = 234 192.168.100.0/24 network? 254-2 = 252 192.168.101.0/24 network? 254-55 = 199 20 Hosts 55 Hosts

9. Solution – IP Address Wastage Subnetting IP address space Borrow bits from host address space to create subnetworks Example: Class C address – 192.168.100.0/24 Borrow from last byte 192.168.100.0/24

10. Next Week Subnetting IP address Space