1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

OSPF

Discussion in 'Network Infrastructure' started by Muhozya, Mar 3, 2006.

  1. Muhozya

    Muhozya Bit Poster

    42
    0
    16
    Hello everyone out there. There's this one confusing me in windows 2003 server, yes it supports two dynamic routing protocols that is RIP V2 and OSPF. RIP best for small or medium size network while OSPF designed for very large networks and its routing tables will never contain loops, how and why is it loop free??? :blink :blink :blink
     
    Certifications: IT Diploma, w2k Professional, Server+
    WIP: MCSE
  2. simongrahamuk
    Honorary Member

    simongrahamuk Hmmmmmmm?

    6,199
    125
    199
    OSPF Only sends updates when a route on its network recieves an update that a path is no longer available. It then sends via multicast (I think) an update to all routers in its routing table that the path is unavailable, so that every router knows immediately not to go that path, so no loops.

    RIP on the other hand sends updates every 30 seconds regardless of whether there have been any changes or not. RIP however only sends it's updates to its neighbouring routers, not to all of them. Because of the time delay that it takes to send the update to all of the routers in the network loops occur.

    Try typing OSPF into a google.

    8)
     
  3. Muhozya

    Muhozya Bit Poster

    42
    0
    16
    So that means that the RIP will still send packets regardless of unavailabilty of the path :blink
     
    Certifications: IT Diploma, w2k Professional, Server+
    WIP: MCSE
  4. simongrahamuk
    Honorary Member

    simongrahamuk Hmmmmmmm?

    6,199
    125
    199
    Only if it hasn't yet been notified that the path is no longer there. In which case it's packets will bounce and it will sent out it's own Update that the route is unavailable.
     
  5. Muhozya

    Muhozya Bit Poster

    42
    0
    16
    Is that the same as that RIP uses hold-downs, split horizons, and poison reverse updates in order to attempt to reduce the possibility of a loop in the network???
     
    Certifications: IT Diploma, w2k Professional, Server+
    WIP: MCSE
  6. Theprof

    Theprof Petabyte Poster Forum Leader

    4,570
    68
    196
    Yes exactly those are the measures used to avoid loops, cause remember the loops occur when inconsitent routing tables are being passed around the network, thus creating routing loops.
     
    Certifications: A+ | CCA | CCAA | Network+ | MCDST | MCSA | MCP (270, 271, 272, 290, 291) | MCTS (70-662, 70-663) | MCITP:EMA | VCA-DCV/Cloud/WM | VTSP | VCP5-DT | VCP5-DCV
    WIP: VCAP5-DCA/DCD | EMCCA

Share This Page

Loading...