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Auto summary question

1number91number9 Member Posts: 13 ■□□□□□□□□□
in CCNA & CCENT
When using Rip v2 are you supposed to always issue the no auto command? In class we always did it but I was wondering if this is common practice in the real world.
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    networker050184networker050184 Mod Posts: 11,962 Mod
    Well, using RIP at all isn't really that common in the real world, but when it is used auto summary has been disabled from what I have seen.
    An expert is a man who has made all the mistakes which can be made.
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    tech-airmantech-airman Member Posts: 953
    1number9 wrote: »
    When using Rip v2 are you supposed to always issue the no auto command? In class we always did it but I was wondering if this is common practice in the real world.

    1number9,

    What does auto summarization do?
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    tim100tim100 Member Posts: 162
    1number9 wrote: »
    I was wondering if this is common practice in the real world.

    Yes. A real world example would be when a cable ISP assigns you a /29 block and gives you a managed router. The router usually uses RIPv2 with "no auto-summary" configured. This is then redistributed into their IGP. This /29 block is usually a subnet of a class A with many other /29 blocks being assigned to other customers.
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