From owner-freebsd-net@FreeBSD.ORG Tue May 9 13:15:21 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6DAF716A415 for ; Tue, 9 May 2006 13:15:21 +0000 (UTC) (envelope-from bms@spc.org) Received: from mindfull.spc.org (mindfull.spc.org [83.167.185.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C36443D49 for ; Tue, 9 May 2006 13:15:20 +0000 (GMT) (envelope-from bms@spc.org) Received: from arginine.spc.org ([83.167.185.2]) by mindfull.spc.org with esmtps (TLSv1:AES256-SHA:256) (Exim 4.52) id 1FdS3a-0001nm-B1; Tue, 09 May 2006 14:15:18 +0100 Received: from localhost (localhost [127.0.0.1]) by arginine.spc.org (Postfix) with ESMTP id 5F38565654; Tue, 9 May 2006 14:15:18 +0100 (BST) Received: from arginine.spc.org ([127.0.0.1]) by localhost (arginine.spc.org [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 65701-02; Tue, 9 May 2006 14:15:17 +0100 (BST) Received: by arginine.spc.org (Postfix, from userid 1078) id 7BA076564E; Tue, 9 May 2006 14:15:17 +0100 (BST) Date: Tue, 9 May 2006 14:15:17 +0100 From: Bruce M Simpson To: freebsd-net@freebsd.org, atanu@icir.org, pavlin@icir.org Message-ID: <20060509131517.GB79277@spc.org> Mail-Followup-To: Bruce M Simpson , freebsd-net@freebsd.org, atanu@icir.org, pavlin@icir.org References: <20060509122801.GA65297@spc.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060509122801.GA65297@spc.org> User-Agent: Mutt/1.4.1i Organization: Incunabulum X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mindfull.spc.org X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - spc.org X-Source: X-Source-Args: X-Source-Dir: Cc: Subject: Re: IP_MAX_MEMBERSHIPS story. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 May 2006 13:15:21 -0000 On Tue, May 09, 2006 at 01:28:01PM +0100, Bruce M Simpson wrote: > A user recently reported a problem with running into IP_MAX_MEMBERSHIPS > on a system running FreeBSD with IPv4 forwarding enabled, and running > the OSPF routing protocol. More background. People may be wondering why this is even an issue for FreeBSD as a router. The answer: the imo_membership array contains members which exist as separate entries for each ifnet in the system, and the system where this was observed to be a problem had a number of ifnet interfaces which was larger than IP_MAX_MEMBERSHIPS (20). Regards, BMS