routing autonomous system

Anne-Marie BraunigAnne-Marie Braunig Member Posts: 3 ■□□□□□□□□□
in CCNA & CCENT
Hi there

I am confused with which routing protocols use an autonomous system, my study guides provide conflicting results for igrp and ospf

Can anyone confirm which protocols use an a.s.

cheers
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Comments

  • UndertowUndertow Member Posts: 48 ■■□□□□□□□□
    IGRP and EIGRP use autonomous systems and they must be defined using the router (e)igrp 10 (autonomous system number).
    Moreover , OSPF uses autonomous systems , but instead of these , you must define the area and not tha autonomous sytem.
    Areas are part of a whole autonomous system.
    An autonomous sytem may include multiple areas ,up to 4294967295 because area id is a 32bit number.
    For routing berween autonomous systems , we need an exterior gateway protocol , such as BGP.
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  • rossonieri#1rossonieri#1 Member Posts: 799 ■■■□□□□□□□
    hello,

    IGRP + EIGRP = AS
    OSPF = proc. id
    the More I know, that is more and More I dont know.
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  • QUIX0TICQUIX0TIC Member Posts: 277
    UnderTow:

    Im new on this board but I am on a couple of others. But, I have to say that is the best answer I have seen in a long time. Great response!
    "To realize one's destiny is a person's only obligation."
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