From: ccie2be (ccie2be@nyc.rr.com)
Date: Tue May 24 2005 - 19:00:04 GMT-3
Typically, routers don't send or forward broadcast traffic. For a router to
do so, it's behaving in a non default manner.
Various host protocols, on the hand, do use broadcasts for a variety of
functions: arp, dhcp, and depending on the desktop OS and underlying
transport protocols a whole slew of other reasons. Windows based hosts used
to generate a lot of broadcast traffic although I don't know how true that
still is.
Off-hand, the only time I can think of when a router generates a directed
broadcast is if it's configured with a helper-address which uses a
directed-broadcast address parameter or if the router is configured to
behave like a host. For example, you can configure a router interface as a
dhcp client.
A router also uses arp so that will generate a broadcast.
HTH, Tim
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ccie
Be
Sent: Tuesday, May 24, 2005 4:43 PM
To: ccielab@groupstudy.com
Subject: Broadcast address
Lets say a router has an ethernet interface with IP 192.168.1.1/24. When
would it use the broadcast address 192.186.1.255 vs 255.255.255.255. Any
good examples would be helpful.
Thanks.
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