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Introduction to networking ( Yarnfield )

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

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Introduction to networking ( Yarnfield )

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  1. Introduction to networking(Yarnfield) Static routes

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

  3. 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

  4. Static route operation Next hop address Next hop IP address

  5. 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 routeaddress

  6. 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. Admin. Distance set to 0 as none in specified 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

  7. Configuring static routes Admin. distance set to 1

  8. 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

  9. Verifying static route configuration

  10. Verifying static route configuration

  11. Troubleshooting static route configuration

  12. Troubleshooting static route configuration

  13. 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

  14. Questions... • ...are there any?

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