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255.255.255.255 UH 0 0 0 ppp0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 172.16.0.0 0.0.0.0 255.240.0.0 U 0 0 0 eth0 192.168.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 192.168.1.0 192.168.96.1 255.255.255.0 UG 0 0 0 eth0 192.168.96.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
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Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 71.46.14.1 0.0.0.0 UG 0 0 0 ppp0 10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth0 71.46.14.1 0.0.0.0
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A routing protocol specifies how routers communicate and share information about the topology of the network, and the capabilities of each routing node. Different protocols are often used for different topologies or different application areas. For example, the
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algorithm. In routers, packets arriving at an interface are examined for source and destination addressing and queued to the appropriate outgoing interface according to their destination address and a set of rules and performance metrics. Rules are encoded in a
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is used. If there are multiple default routes, the metric is also used to determine which to use. If there are multiple routes with the same subnet mask and metric, the system may use
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Many implementations list these directly-connected networks as routing table entries, in which case, this condition is handled by the general route table lookup.
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that contains entries for all interfaces and their connected networks. If no rule satisfies the requirements for a network packet, it is forwarded to a
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357:. In order to achieve a successful transfer of data, the algorithm uses a routing table to select a next-hop router as the next destination for a
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error message is sent to the originator of the packet, to inform that host that the packet could not be delivered. To avoid unnecessary
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234:. This involves not only protocols and technologies but includes the policies of the worldwide organization and configuration of
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is chosen as it is the most specific one. If there are multiple routes with the same subnet mask, the route with the lowest
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from a source to its destination in an IP network. The process uses static configuration rules or dynamically obtained from
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341:(BGP) are examples of the exterior type. BGP is the dominant route distribution protocol used on the Internet.
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689:"Guide to IP Layer Network Administration with Linux - chapter 4.2. Routing to Locally Connected Networks"
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282:. Routing tables are maintained either manually by a network administrator, or updated dynamically by a
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infrastructure. In each IP network node, IP routing involves the determination of a suitable path for a
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Please help update this article to reflect recent events or newly available information.
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may be broadly distinguished by their realm of operation in terms of network scope.
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closer to the desired final destination, a total path potentially spanning multiple
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Networks are separated from each other by specialized hosts, called gateways or
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methods to direct traffic to the next available intermediate network node one
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Process used to determine which path a packet or datagram can be sent
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When multiple route table entries match, the entry with the longest
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route traffic between them. The former group is exemplified by the
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Send datagram to the next-hop address listed in the routing table;
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algorithms in most routing software determine a route through a
294:(OSPF) protocol is generally used within an enterprise and the
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The IP forwarding algorithm is a specific implementation of
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with specialized software support optimized for routing.
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652:(4th ed.). Upper Saddle River, NJ: Prentice Hall.
542:A default route is recognized by the destination
457:Send a forwarding error message to the originator
184:may be compromised due to out-of-date information
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396:matches a directly connected network address
298:(BGP) is used on a global scale. BGP is the
103:introducing citations to additional sources
64:Learn how and when to remove these messages
515:The host has several network interfaces.
211:Learn how and when to remove this message
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93:Relevant discussion may be found on the
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418:The routing table contains a route for
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371:The IP forwarding algorithm states:
444:Send datagram to the default route
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500:The following presents a typical
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585:Use Gateway (gateway filled in)
375:Given a destination IP address,
302:for worldwide Internet routing.
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86:relies largely or entirely on a
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480:When no route is available, an
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519:is the interface name of the
475:equal-cost multi-path routing
327:Routing Information Protocol
317:are used for routing within
650:Internetworking with TCP/IP
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648:Comer, Douglas E. (2000).
506:Unix-like operating system
477:as a forwarding strategy.
323:exterior gateway protocols
315:Interior gateway protocols
335:Exterior Gateway Protocol
669:"IP Routing and Subnets"
331:Open Shortest Path First
292:Open Shortest Path First
339:Border Gateway Protocol
306:Protocol classification
296:Border Gateway Protocol
521:network interface card
438:a default route exists
406:over that network link
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569:Common routing flags
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246:to select specific
593:Target is a Host (
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490:network congestion
333:(OSPF), while the
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367:next-hop address.
345:Routing algorithm
311:Routing protocols
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692:. Retrieved
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672:. Retrieved
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605:Route is Up
597:of 32 bits)
577:Description
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114:"IP routing"
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47:Please help
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467:subnet mask
355:IP networks
232:IP networks
694:2022-08-02
674:2022-08-02
632:References
363:IP address
329:(RIP) and
224:IP routing
125:newspapers
50:improve it
488:to avoid
194:June 2020
155:June 2020
95:talk page
56:talk page
709:Category
525:Ethernet
359:datagram
321:, while
236:Internet
715:Routing
595:bitmask
544:0.0.0.0
434:else if
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351:routing
263:routers
228:routing
139:scholar
527:port.
471:metric
361:. The
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612:Notes
574:Flag
533:PPPoE
531:is a
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132:books
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529:ppp0
517:eth0
482:ICMP
452:else
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101:by
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