Definition/Classification of Bogon

Aftab Siddiqui aftab.siddiqui at
Tue Jul 24 11:24:22 UTC 2018

Hi Everyone,
Just wanted to understand something about Bogons.

As per RFC3871 - A "Bogon" (plural: "bogons") is a packet with an IP source
address in an address block not yet allocated by IANA or the Regional
Internet Registries (ARIN, RIPE, APNIC...) as well as all addresses
reserved for private or special use by RFCs. See [RFC3330] and [RFC1918].

Q - Generally, Private or Reserved ASNs are considered as Bogon ASN but
what about unallocated ASNs?

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

Additionally, Geoff Huston [1] explained all the possible classifications
of "Bogon" in his blog post back in 2004 --> "Sometimes a bogon is just a
case of keystroke error by a network operator, and the consequent bogons
are entirely inadvertent, and other times it may be a disagreement between
an end user and a registration authority"

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?

[1] -

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