Return-Path: william@bourbon.usc.edu Delivery-Date: Sat Apr 28 08:19:23 2007 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on merlot.usc.edu X-Spam-Level: X-Spam-Status: No, score=-3.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, NO_REAL_NAME autolearn=ham version=3.1.3 Received: from bourbon.usc.edu (bourbon.usc.edu [128.125.9.75]) by merlot.usc.edu (8.13.5/8.13.5) with ESMTP id l3SFJNGY011756 for ; Sat, 28 Apr 2007 08:19:23 -0700 Received: from bourbon.usc.edu (localhost.localdomain [127.0.0.1]) by bourbon.usc.edu (8.13.5/8.13.5) with ESMTP id l3SFIlOJ002978 for ; Sat, 28 Apr 2007 08:18:47 -0700 Message-Id: <200704281518.l3SFIlOJ002978@bourbon.usc.edu> To: cs551@merlot.usc.edu Subject: Re: traffic shaping Date: Sat, 28 Apr 2007 08:18:47 -0700 From: william@bourbon.usc.edu Someone wrote: > When a traffic is shaped (delayed from entering a network), > exactly where in the boundary the event occurs? Is it > inside the boundary router (i.e. no tokens, queue packet up) or > its input port (that would seem like "drop" the packet)? If you are asking a generic question, then anywhere is possible. Wherever you want the traffic to be shaped, you can install a token bucket filter. Or are you asking just about an input port? If you put a token bucket filter right before an input, that would work because a token bucket filter can has its own buffer. (A token bucket filter is a mathematical abstraction, it can be implemented any way you want.) -- Bill Cheng // bill.cheng@usc.edu