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What is the Importance of ASN ?
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What is the Importance of ASN ?

Can the members plz enlighten me :

  • What is the Importance of ASN / AS numbers ?
  • How does it help a web host ?
  • What advantages do web hosts when they "declare" an ASN ?

Thank You.

Comments

  • WilliamWilliam Member
    edited October 2015

    eh, you seem to lack basic understanding of what an ASN actually is and what it is used for.... you better get that before or this would be a very long explanation.

    In basic: An ASN allows you to use other ASNs as upstream via BGP (the currently most common routing protocol, nearly 100%), with it you can run your own independent network with multiple upstreams and/or peerings for redundancy and/or cost based routing.

    Thanked by 3Mridul Fusl alfred
  • MadMad Member

    @William said:

    you can run your own independent network with multiple upstreams and/or peerings for redundancy and/or cost based routing.

    This is clear and accurate enough, well done.
    It actually describes what it is, in 4 words "your own independent network"

  • Got it Guys.
    So, Whats the importance of "declaring" your own ASN ?

  • Mridul said: Got it Guys. So, Whats the importance of "declaring" your own ASN ?

    William said: with it you can run your own independent network with multiple upstreams and/or peerings for redundancy and/or cost based routing.

  • ClouviderClouvider Member, Patron Provider

    Mridul said: Got it Guys. So, Whats the importance of "declaring" your own ASN ?

    None. It simply means that the operator of such AS (Autonomous System) potentially runs own BGP network.

    Of course there are companies running their own AS who have worse connectivity than if they would let their DC handle it, and ones that add multiple networks (other AS'es) to their network mix for better performance/reliability

    Thanked by 1XiNiX
  • Yea, having ASN itself means nothing - It can be still singlehomed to DC/one ISP.

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