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Static Routing - Posted at 15:06 on 20/1/2007 by @lfons

Static Routing


Static routing provides a means of explicitly defining the next hop from a router for a particular destination. A router SHOULD provide a means for defining a static route to a destination, where the destination is defined by a network prefix. The mechanism SHOULD also allow for a metric to be specified for each static route.

A router that supports a dynamic routing protocol MUST allow static routes to be defined with any metric valid for the routing protocol used. The router MUST provide the ability for the user to specify a list of static routes that may or may not be propagated through the routing protocol. In addition, a router SHOULD support the following additional information if it supports a routing protocol that could make use of the information. They are:

  • TOS,
  • Subnet Mask, or
  • Prefix Length, or
  • A metric specific to a given routing protocol that can import the route.


We intend that one needs to support only the things useful to the given routing protocol. The need for TOS should not require the vendor to implement the other parts if they are not used.

Whether a router prefers a static route over a dynamic route (or vice versa) or whether the associated metrics are used to choose between conflicting static and dynamic routes SHOULD be configurable for each static route.

A router MUST allow a metric to be assigned to a static route for each routing domain that it supports. Each such metric MUST be explicitly assigned to a specific routing domain. For example:

           route via rip metric 3
           route via ospf inter-area metric 27
           route via egp 123 metric 99

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