Definition/Classification of Bogon

William Herrin bill at
Tue Jul 24 13:02:28 UTC 2018

On Tue, Jul 24, 2018 at 7:24 AM, Aftab Siddiqui
<aftab.siddiqui at> wrote:
> Q - Generally, Private or Reserved ASNs are considered as Bogon ASN but
> what about unallocated ASNs?

Hi Aftab,

You can reasonably think of a bogon as any Internet number resource
which according to the registration authority should not appear on
whatever network is at issue.

> Q - Is there any RFC (or even draft) which classify unallocated ASNs as
> Bogon as well?

The RFCs offer guidelines and conventions in this, not hard rules. It
would be an error to treat them as hard rules.

> Q - In the above scenario when an RIR deregister a resource (IPv4/v6 or
> ASN) due to any disagreement (sometimes deregistration happens because of
> non-payment and can be resolved in a few days/weeks). How long should a
> service provider wait to mark them as bogon and stop advertising or
> accepting it?

In my opinion: until the customer stops paying you or the authority
assigns the resource to someone else. As long as the resource was
properly assigned to the customer when they started advertising it,
there's no real angle to forcibly ending it sooner.

Bill Herrin

William Herrin ................ herrin at  bill at
Dirtside Systems ......... Web: <>

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