Re: Directed broadcasts

Article View: comp.dcom.sys.cisco

Article #459

Back to comp.dcom.sys.cisco Previous Next

#459

From: Greg Satz
Date: Fri, 06 Jul 1990 09:03

14 lines
1025 bytes

The hardware (MAC) address will determine who receives a packet. The
network layer address (IP) will determine how that packet is handled and
where it is routed. To be a directed broadcast only implies that the IP
destination address contains a well formed IP network number in the network
part and all ones or all zeros (originating host preference) in the host
part. The network mask determines what are network and host parts.

To answer your question, no. The hardware address has no bearing on whether
a directed broadcast will be forwarded. A directed broadcast is only
broadcast on its final hop. Up until then, it is treated like any other
unicast packet.

Greg Satz
cisco

Technical Details

Message-ID: <23158@boulder.Colorado.EDU>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!uwm.edu!zaphod.mps.ohio-state.edu!ncar!boulder!daemon

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!uwm.edu!zaphod.mps.ohio-state.edu!ncar!boulder!daemon
From: satz@cisco.com (Greg Satz)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: Directed broadcasts
Message-ID: <23158@boulder.Colorado.EDU>
Date: 6 Jul 90 09:03:57 GMT
Sender: news@boulder.Colorado.EDU
Lines: 14