Static Route

Identify Default gatewayWhat is the default

gateway for PC1PC2r1r2

PC1 PC2

Routing TableWhen all the

connecting interfaces are ‘up’, the routing table :

C 192.168.100.0C 192.168.10.1C 192.168.200.1

C – connected networks

Static routeNeeds three parametersDestination network Subnet mask default gateway address

ROUTER(CONFIG)# ip route <destination network > <subnet mask> <default-gateway address>

Example:ip route 192.168.100.0 255.255.255.0 192.168.20.1

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

Default Static Route

Default route is to any destination, any subnet mask thru a gateway

Default Route at R2R2(config)# ip route 0.0.0.0 0.0.0.0 200.1.2.2

Internet

200.1.2.2/30.

IP Address Wastage How many addresses

are wasted on192.168.102.0/24

network? 254-20 = 234192.168.100.0/24

network?254-2 = 252 192.168.101.0/24

network?254-55 = 199

20 Hosts

55 Hosts

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

Next Week

Subnetting IP address Space