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- Path: sparky!uunet!wupost!zaphod.mps.ohio-state.edu!samsung!crackers!stars!martillo
- From: martillo@stars.clearpoint.com (Joachim Martillo)
- Newsgroups: comp.protocols.tcp-ip
- Subject: IP Directed Broadcast
- Message-ID: <11132@crackers.clearpoint.com>
- Date: 30 Jul 92 06:10:16 GMT
- Sender: news@clearpoint.com
- Organization: Clearpoint Inc., Hopkinton, MA
- Lines: 15
-
- On reading RFC 1009 Requirements for Internet Gateways, one finds in
- section 4.4 on page 34. An Internet gateway is permitted, but not
- required, to filter out directed broadcasts destined for any of its
- locally-connected networks.
-
- If a networks gateways do not filter IP broadcasts and that network
- has active loops in its subnet topology, and if someone extern to the
- network sends a directed broadcast to that network with a TTL of 255,
- the target network could easily suffer a major broadcast storm.
-
- Such a storm would seem a bad thing. Maybe I am missing something,
- but perhaps filterning directed broadcasts should be obligatory rather
- than optional.
-
- Joachim Carlo Santos Martillo Ajami
-