blank.gif (43 bytes)

Church Of The
Swimming Elephant

Search:
5.3.5.2 Directed Broadcasts Connected: An Internet Encyclopedia
5.3.5.2 Directed Broadcasts

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1812
Up: 5. INTERNET LAYER - FORWARDING
Up: 5.3 SPECIFIC ISSUES
Up: 5.3.5 Forwarding of Internet Layer Broadcasts
Prev: 5.3.5.1 Limited Broadcasts
Next: 5.3.5.3 All-subnets-directed Broadcasts

5.3.5.2 Directed Broadcasts

5.3.5.2 Directed Broadcasts

A router MUST classify as network-prefix-directed broadcasts all valid, directed broadcasts destined for a remote network or an attached nonsubnetted network. Note that in view of CIDR, such appear to be host addresses within the network prefix; we preclude inspection of the host part of such network prefixes. Given a route and no overriding policy, then, a router MUST forward network- prefix-directed broadcasts. Network-Prefix-Directed broadcasts MAY be sent.

A router MAY have an option to disable receiving network-prefix- directed broadcasts on an interface and MUST have an option to disable forwarding network-prefix-directed broadcasts. These options MUST default to permit receiving and forwarding network-prefix- directed broadcasts.

DISCUSSION

There has been some debate about forwarding or not forwarding directed broadcasts. In this memo we have made the forwarding decision depend on the router's knowledge of the destination network prefix. Routers cannot determine that a message is unicast or directed broadcast apart from this knowledge. The decision to forward or not forward the message is by definition only possible in the last hop router.


Next: 5.3.5.3 All-subnets-directed Broadcasts

Connected: An Internet Encyclopedia
5.3.5.2 Directed Broadcasts

Cotse.Net

Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

 
.
www.cotse.com
Have you gone to church today?
.
All pages İ1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephantİ1999, 2000, 2001, 2002, 2003 Cotse.com.
Cotse.com is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609