From owner-freebsd-questions@FreeBSD.ORG Fri May 27 23:09:04 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0D85C106564A for ; Fri, 27 May 2011 23:09:04 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout028.mac.com (asmtpout028.mac.com [17.148.16.103]) by mx1.freebsd.org (Postfix) with ESMTP id E988D8FC21 for ; Fri, 27 May 2011 23:09:03 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp028.mac.com (Oracle Communications Messaging Exchange Server 7u4-20.01 64bit (built Nov 21 2010)) with ESMTPSA id <0LLV000ZUMZ23E70@asmtp028.mac.com> for freebsd-questions@freebsd.org; Fri, 27 May 2011 16:09:03 -0700 (PDT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.4.6813,1.0.148,0.0.0000 definitions=2011-05-27_08:2011-05-28, 2011-05-27, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=1 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1012030000 definitions=main-1105270190 From: Chuck Swiger In-reply-to: Date: Fri, 27 May 2011 16:09:02 -0700 Message-id: <8201F019-44EF-4AA3-B221-45438628B80E@mac.com> References: <4DDB706E.2090108@gmx.com> To: scubacuda@gmail.com X-Mailer: Apple Mail (2.1084) Cc: FreeBSD - Subject: Re: ARP tables in FreeBSD (vs Linux) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 May 2011 23:09:04 -0000 On May 27, 2011, at 3:31 PM, Rogelio wrote: > It was one of those things where in an effort to quickly fix things, I > split up the collision domain and used a router to handle the ARP. > > Right now, a 7201 router has about 15K ARPs, and the system is much slower. I'm not surprised. Even good switches tend to have max ARP table sizes of 4000 of 8000 entries; your 7201 or the Linux gateway previously might be encountering slowdowns because the switches are constantly needing to relearn ARP table entries which have been dropped. Anyway, regardless of your router platform, it's not a preferable situation to put thousands of MACs into a single collision domain, much less tens of thousands. Regards, -- -Chuck