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The default route is generally the address of another router, which treats the packet the same way: if a route matches, the packet is forwarded accordingly, otherwise the packet is forwarded to the default route of that router. The route evaluation process in each router uses the
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is the next-hop network gateway. The process repeats until a packet is delivered to the destination host, or earlier along the route, when a router has no default route available and cannot route the packet otherwise. In the latter case, the packet is dropped and an
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In the highest-level segment of a network, administrators generally point the default route for a given host towards the router that has a connection to a
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Note that the degenerate route to prefix 0.0.0.0/0 is used as a default route and MUST be accepted by all implementations.
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message may be returned. Each router traversal counts as one hop in the distance calculation for the transmission path.
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Classless Inter-domain
Routing (CIDR): The Internet Address Assignment and Aggregation Plan
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INTERNET CONTROL MESSAGE PROTOCOL, DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION
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method to obtain the most specific route. The network with the longest
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when no specific address of a next-hop host is available from the
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The device to which the default route points is often called the
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49:. Unsourced material may be challenged and removed.
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153:or network prefix that matches the destination
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109:Learn how and when to remove this message
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273:(September 1981).
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99:December 2008
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