Re: "AD on IP summary Address in Eigrp"

You have to specify AD or it defaults to 5 for loop prevention. If the router receives the same summary from another router, it will use the local route with the lower AD.

Is it required to set it to something <90? No, it is not a requirement. You could set the AD higher so that the router will use a learned summary as opposed to using the discard route, for example. Dangerous, but certainly something that you can do.

Ronnie

Sent from my iPhone

On Jul 28, 2012, at 6:15 AM, "ccie.butcher" <ccie.butcher_at_gmail.com> wrote:

> Is there always necessary to add an AD value (less than 90) while
> configuring manual summarization in EIGRP by the command - ip
> summary-address eigrp <AS no> <Ip addr> <Mask> <AD> or it is only required
> when we are doing the manual summarization of same ip addresses on
> different routers in order to avoid the reception of summary advertisement
> of same address from different routers.
>
> --
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>
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Received on Sat Jul 28 2012 - 09:31:15 ART