From owner-freebsd-questions@FreeBSD.ORG Fri Nov 30 19:51:14 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 18188724 for ; Fri, 30 Nov 2012 19:51:14 +0000 (UTC) (envelope-from dweimer@dweimer.net) Received: from webmail.dweimer.net (24-240-198-187.static.stls.mo.charter.com [24.240.198.187]) by mx1.freebsd.org (Postfix) with ESMTP id DAA208FC0C for ; Fri, 30 Nov 2012 19:51:13 +0000 (UTC) Received: from www.dweimer.net (webmail.dweimer.net [192.168.5.1]) by webmail.dweimer.net (8.14.5/8.14.5) with ESMTP id qAUJpCZR046498 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Fri, 30 Nov 2012 13:51:12 -0600 (CST) (envelope-from dweimer@dweimer.net) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 30 Nov 2012 13:51:12 -0600 From: dweimer To: Subject: Re: CARP within VirtualBox Does it =?UTF-8?Q?work=3F?= Organization: dweimer.net Mail-Reply-To: In-Reply-To: References: <737f4b1c8bff13850af119f917ed811c@dweimer.net> <9232DDFC-F40B-4914-A92D-3B5D9C1ECE5F@my.gd> Message-ID: X-Sender: dweimer@dweimer.net User-Agent: Roundcube Webmail/0.8.1 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: dweimer@dweimer.net List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Nov 2012 19:51:14 -0000 On 2012-11-30 13:44, dweimer wrote: > On 2012-11-29 14:07, dweimer wrote: >> On 2012-11-29 12:53, Fleuriot Damien wrote: >>> On Nov 29, 2012, at 6:43 PM, dweimer wrote: >>> >>>> I was trying to setup a test of CARP on two virtual machines >>>> running in VirtualBox 4.2.4r81684 I am not sure if I have something >>>> wrong with my CARP configuration or if VirtualBox just doesn't work >>>> right with it. I can only ping the CARP interface IP address from >>>> the machine listed as MASTER, if I do an ifconfig carp0 down on the >>>> MASTER the other machine correctly switches form BACKUP to MASTER >>>> and then I can ping the interface from it but not from the Original >>>> system. >>>> >>>> The VirtualBox systems are both using bridged networking, and the >>>> host cannot ping the carp0 IP address but can ping the interface IP >>>> address. >>>> >>>> Before I go through more trouble shooting, does anyone know if >>>> CARP doesn't work with VirtualBox? >>>> >>>> carp configuration >>>> Machine1: >>>> ifconfig_em0="UP" >>>> ifconfig_em0_name="LAN" >>>> ipv4_addrs_LAN="10.20.190.201/16" >>>> defaultrouter="10.20.111.2" >>>> cloned_interfaces="carp0" >>>> ifconfig_carp0="vhid 1 advskew 100 pass ReduntantCarpTest >>>> 10.20.190.203/16 >>>> >>>> ifconfig carp0: >>>> carp0 flags=49 metric 0 mtu 1500 >>>> inet 10.20.190.203 netmask 0xffff0000 >>>> nd6 options=29 >>>> carp: MASTER vhid 1 advbase 1 advskew 100 >>>> >>>> >>>> Machine2: >>>> ifconfig_em0="UP" >>>> ifconfig_em0_name="LAN" >>>> ipv4_addrs_LAN="10.20.190.202/16" >>>> defaultrouter="10.20.111.2" >>>> cloned_interfaces="carp0" >>>> ifconfig_carp0="vhid 1 pass ReduntantCarpTest 10.20.190.203/16 >>>> >>>> ifconfig carp0: >>>> carp0 flags=49 metric 0 mtu 1500 >>>> inet 10.20.190.203 netmask 0xffff0000 >>>> nd6 options=29 >>>> carp: BACKUP vhid 1 advbase 1 advskew 0 >>>> >>>> FreeBSD version is 9.1RC3 on both test machines. >>> >>> >>> >>> We're using FreeBSD and CARP in virtualized environments at work, >>> albeit not on VirtualBox but on Proxmox/KVM. >>> >>> First, I would advise replacing 10.20.190.203/16 with >>> 10.20.190.203/32 >>> >>> >>> I notice your carp0 is MASTER on machine1 with an advskew of 100 vs >>> machine 2 advskew 0, same advbase. >>> Confirm this is *after* you've set carp0 down on machine2. >>> >>> If both carps are up and machine1 with advskew 100 beats machine2 >>> with advskew 0, you have an additional problem. >>> >>> >>> See if you have any more luck with the /32 address on carp0 anyway. >> >> The documentation shows the mask matching that of the interface: >> hostname="hostb.example.org" >> ifconfig_fxp0="inet 192.168.1.4 netmask 255.255.255.0" >> cloned_interfaces="carp0" >> ifconfig_carp0="vhid 2 pass testpass 192.168.1.51/24" >> >> This is consistent with the man page for CARP on the system as well. >> Regardless I tried with the /32 and had the same result as I did >> with >> the /16. I had done various UP/DOWN on interfaces so the current >> MASTER was just the last one to have not been DOWN. I think I might >> just copy these VMs to my VMWARE Workstation 9 install on my home PC >> after work tonight and see if the problem persists. > > The behavior definitely changed going from VirtualBox to VMWare, the > only change in my configuration was the IP addresses to match the > home > network. However now I can talk to the carp interface form other > machines, but they receive two response one from each of the test > systems. TCPDUMP shows that they are each seeing the others > broadcasts, but for some reason they are both running as MASTER. If > you run a DOWN/UP on the interface, it briefly shows as BACKUP before > switching to MASTER. I tried with both /24 subnet of my home > network, > and setting the carp0 interface to /32, both behaved the same. Any > one have any other ideas, as to whether this comes down to a Virtual > Network Issue, or a setup issue on my part. I forgot to mention I did verify that the inet.carp.arpbalance is set at its default of 0 which should be disabled on both systems. -- Thanks, Dean E. Weimer http://www.dweimer.net/