From owner-freebsd-questions Thu Nov 14 13:03:42 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id NAA05386 for questions-outgoing; Thu, 14 Nov 1996 13:03:42 -0800 (PST) Received: from silver.sms.fi (root@silver.sms.fi [194.111.122.1]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id NAA05232 for ; Thu, 14 Nov 1996 13:01:08 -0800 (PST) Received: (from pete@localhost) by silver.sms.fi (8.7.6/8.7.3) id XAA13454; Thu, 14 Nov 1996 23:00:48 +0200 (EET) Date: Thu, 14 Nov 1996 23:00:48 +0200 (EET) Message-Id: <199611142100.XAA13454@silver.sms.fi> From: Petri Helenius To: Seppo Kallio Cc: Steve , freebsd-questions@FreeBSD.ORG Subject: Re: arp info overwritten In-Reply-To: References: <199611141529.RAA06384@silver.sms.fi> Sender: owner-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Seppo Kallio writes: > 1. It is cosco router > 2. netmasks are OK, but we use unclassified ip, that is mask is varying I hope you mean classless :-) > 3. Netmasks of the two nodes: the FreeBSD and the micro are correct, they > are 255.255.0.0 They highly likely are incorrect. > 4. There is some nodes with some other masks between > 255.255.0.0 - 255.255.255.0 > Which makes this problem. The issue here is that you have misunderstood the concept of 'variable length subnets'. It means that a subnet of an address (for example a B-class address) can have different length prefixes, but *NOT* the same subnet. This means that if you have 155.155.3.0 masked with 255.255.255.0 you CAN NOT have 155.155.3.16 masked with 225.255.255.240 NOR 155.155.0.0 masked with 255.255.0.0 or othervise bad things start to happen to you (like the one you describe) > I think proxy arping is in use. > Which in some cases saves you, but causes other side-effects for misconfigured machines. Pete