From owner-freebsd-questions Fri Jan 18 10:25:35 2002 Delivered-To: freebsd-questions@freebsd.org Received: from lv.raad.tartu.ee (lv.raad.tartu.ee [194.126.106.110]) by hub.freebsd.org (Postfix) with ESMTP id 24BD337B400 for ; Fri, 18 Jan 2002 10:25:29 -0800 (PST) Received: Message by Barricade lv.raad.tartu.ee with ESMTP id g0IIPRG09201 for ; Fri, 18 Jan 2002 20:25:27 +0200 Message-Id: <200201181825.g0IIPRG09201@lv.raad.tartu.ee> Received: from INFO/SpoolDir by raad.tartu.ee (Mercury 1.48); 18 Jan 02 20:25:09 +0200 Received: from SpoolDir by INFO (Mercury 1.48); 18 Jan 02 20:24:59 +0200 From: "Toomas Aas" Organization: Tartu City Government To: freebsd-questions@freebsd.org Date: Fri, 18 Jan 2002 20:24:51 +0200 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: weird issue with icmpmonitor Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hello! Is anyone else using icmpmonitor (/usr/ports/net/icmpmonitor)? I use it for monitoring ca 20 hosts and I find it quite good, except this one nagging issue. From time to time, it seems, icmpmonitor stops receiving ICMP responses from *all* of the hosts it sends echo requests to. I can see it with 'icmpmonitor -v': ICMP packets are sent out, but replies never arrive. While this happens, I can still successfully ping the hosts in question. Some of the hosts are on the same LAN with the box running icmpmonitor, some are beyond the gateway. So I don't think it's a problem somewhere on the network. Generally, when I receive the notification that all the hosts are down, I kill the running icmpmonitor daemon and try icmpmonitor -v. Then I see that no ICMP responses are coming in. I usually try it for a couple of times and finally give up, leaving icmpmonitor not running. And the most interesting part is: when I decide to try it again after couple of days, it miraculously (sp?) starts working again. 'icmpmonitor -v' shows packets going out and coming in just fine. Then I start the icmpmonitor daemon and I'm fine again for a couple of weeks. I do not reboot the box where icmponitor is running. It just starts working again itself. What might be going on here? Maybe I need to tweak some sysctls? System specifics: #uname -a FreeBSD kuller.raad.tartu.ee 4.3-RELEASE FreeBSD 4.3-RELEASE #4: Wed Aug 22 11:4 8:24 EET 2001 toomas@kuller.raad.tartu.ee:/mirror01/usr/src/sys/compile/KULLER i386 #icmpmonitor icmpmonitor[83030]:ICMPmonitor v1.1 by lord@crocodile.org #ifconfig fxp0: flags=8843 mtu 1500 inet 194.126.106.100 netmask 0xfffffff0 broadcast 194.126.106.111 inet6 fe80::260:94ff:fe19:8df2%fxp0 prefixlen 64 scopeid 0x1 ether 00:60:94:19:8d:f2 media: 100baseTX status: active -- Toomas Aas | toomas.aas@raad.tartu.ee | http://www.raad.tartu.ee/~toomas/ * What happens if you get scared half to death twice? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message