1 / 10

Routing Information Protocol (RIP)

Routing Information Protocol (RIP). Josh Timmons, CCNA Datacom II February 15, 2000. RIP -- What is it?. RIP is a rout ing protocol for exchanging routing table information between routers.

marja
Télécharger la présentation

Routing Information Protocol (RIP)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Routing Information Protocol(RIP) Josh Timmons, CCNA Datacom II February 15, 2000

  2. RIP -- What is it? • RIP is a routing protocol for exchanging routing table information between routers. • Routing updates must be passed between routers so that they can make the proper choice on how to route a packet.

  3. RIP Characteristics • Distance vector routing protocol. • Uses hop count as a path selection metric. • Three types of timers. • Multiple stability features.

  4. Distance Vector Routing Protocol • Each router sends all or part of its routing table in routing updates. However, the updates are only sent to neighboring routers. Cisco Systems Inc.

  5. Hop Count -- Fifteen Hop Limit • Hop count is the sum of all the legs in a route. • After 15 hops, the packet is discarded Lucent Technologies

  6. Timers • Routing-update timer • By default, routers send updates every 30 seconds. • A small random number is added to prevent collisions. • Route timeout • A route timeout timer is associated with a route. When it expires, the route is marked invalid. • Route-flush timer • After the route timeout expires, the route-flush timer eventually expires, deleting the route from the table.

  7. Multiple Stability Features • Split Horizon • Information learned about a route is not sent back out the interface it was learned from. • Hold-down mechanisms • When a link in a route fails, that route is put in a hold-down state, where routers neither send or receive updates about that route.

  8. Rip Packet • A -- Command - request or response. • B -- Version # - specifies version of RIP. • C -- Zero - Not used. • D -- Address Family Identifier (AFI) - Indicates type of address being specified (IP, IPX, etc) • E -- Address - Specifies IP address of entry. • F -- Metric - # of hops traversed from source to destination

  9. Drawbacks • RIP version 1 does not recognize subnets. • This feature was added in RIP version 2. • Because RIP only uses hop count as a metric, packets may be forced to take a slower route with less hops over a faster route with more hops. • Other routing protocols use a combination of different metrics to calculate a route.

  10. FHSU Percussion Ensemble • Where: • Beach/Schmidt PAC • When: • Thursday 2-17-2000 • 8:00 PM • Cost: • Adults -- $6.00 • Senior Citizens & Students Over 12 -- $4.00 • FHSU Students -- Free w/ ID

More Related