Introduction to networking (Yarnfield) Static routes

Objectives Describe what a static route is Define what administrative distance refers to Describe how to configure a static route

Static routes Static routes are commonly used when routing from a network to a stub network A stub network is a network that can only be accessed by one route Routing protocols used in stub networks can be a waste of resources Therefore static routes are configured for connectivity to remote networks that are not directly connected to a router

Static route operation Next hop address Next hop IP address

Administrative distance A measure of reliability When there are two or more protocols showing two or more routes to a destination, the router uses the admin distance to determine which protocol to use Lower values are more reliable Static routes have a default admin distance of 1 However, a true directly connected route has an admin distance of 0! To verify the administrative distance use show ip route address

Configuring static routes Hoboken must be configured so that it can reach the 172.16.1.0 network and the 172.16.5.0 network. Both of these networks have a subnet mask of 255.255.255.0. Hoboken(config)#ip route 172.16.1.0 255.255.255.0 s1 Hoboken(config)#ip route 172.16.5.0 255.255.255.0 s0 Admin. Distance set to 0 as none in specified

Configuring static routes Admin. distance set to 1

Configuring default route forwarding Default routes are used to route packets with destinations that do not match any of the other routes in the routing table

Verifying static route configuration

Verifying static route configuration

Troubleshooting static route configuration

Troubleshooting static route configuration

Summary Static and dynamic routing is often used together Static routes are commonly used with stub networks i.e. networks with only one way to access them Administrative distance is a measure of reliability

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