From owner-freebsd-net Sun Jan 31 21:10:35 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id VAA20670 for freebsd-net-outgoing; Sun, 31 Jan 1999 21:10:35 -0800 (PST) (envelope-from owner-freebsd-net@FreeBSD.ORG) Received: from ns11.nokia.com (ns11.nokia.com [131.228.6.230]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA20665 for ; Sun, 31 Jan 1999 21:10:33 -0800 (PST) (envelope-from yu.shi@research.nokia.com) Received: from pepper.research.nokia.com (pepper.research.nokia.com [131.228.12.3]) by ns11.nokia.com (8.8.8/8.6.9) with ESMTP id HAA25985 for ; Mon, 1 Feb 1999 07:10:31 +0200 (EET) Received: from pupu.research.nokia.com (pupu.research.nokia.com [131.228.13.130]) by pepper.research.nokia.com (8.9.1a/8.9.1) with ESMTP id HAA21070 for ; Mon, 1 Feb 1999 07:10:30 +0200 (EET) Received: from research.nokia.com ([172.28.31.90]) by pupu.research.nokia.com (8.9.1a/8.9.1) with ESMTP id HAA23270 for ; Mon, 1 Feb 1999 07:07:48 +0200 (EET) Message-ID: <36B53717.2D4B7C8F@research.nokia.com> Date: Mon, 01 Feb 1999 13:09:43 +0800 From: Shi Yu Reply-To: yu.shi@research.nokia.com Organization: Nokia China X-Mailer: Mozilla 4.02 [en] (Win95; I) MIME-Version: 1.0 To: "freebsd-net@FreeBSD.ORG" Subject: drop packets? Content-Type: text/plain; charset=gb2312 Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I have a question: When the IF output queue is full, the if_output simply drop the packet!?? I mean for a busy router, it often forwards the a lot of packets. If the IF output queue is often full, why ip stack does not get feedback from the driver and buffer the packets so that less packets are dropped ? Is the IF output queue often full? what is the max size of them? How to supervise them? Thanks a lot! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message