Date: Tue, 05 Jun 2007 19:41:36 +0100 From: Tom Judge <tom@tomjudge.com> To: John Nielsen <lists@jnielsen.net> Cc: freebsd-questions@freebsd.org, ivan@careytech.com.au Subject: Re: How to correctly use 2 on board nics Message-ID: <4665AE60.7080908@tomjudge.com> In-Reply-To: <20070605135733.bju5l1fioc40c00c@newwebmail.jnielsen.net> References: <46654109.8070507@careytech.com.au> <20070605135733.bju5l1fioc40c00c@newwebmail.jnielsen.net>
next in thread | previous in thread | raw e-mail | index | archive | help
John Nielsen wrote: > Quoting Ivan Carey <ivan@careytech.com.au>: >> I have a server board with 2 onboard nic's >> I have set them up in rc.conf as follows >> >> defaultrouter="192.168.1.1" >> network_interfaces="em0 em1 lo0" >> ifconfig_em0="inet 192.168.1.3 netmask 255.255.255.0" >> ifconfig_em1="inet 192.168.1.4 netmask 255.255.255.0" >> >> The question, is this the correct configuration? > > Manually specifying network_interfaces is deprecated (take that line > out). Putting both NIC's on the same subnet and segment but with > different IP's like this may not be too useful.. > >> If I have both nic's connected to the switch I can ping 192.168.1.1 >> and 192.168.1.3 and 192.168.1.4 >> >> If I have only em0 connected I can ping 192.168.1.1 and 192.168.1.3 >> >> If I have only em1 connected I can ping 192.168.1.3. > > That is because the route to 192.168.1.1 is associated with em0 at this > point. > >> What could the 2 onboard nic's be best used for. I was thinking that >> in the event on was to fail then the other would still be ok. > > For that to be most useful you'll want to set something up so they can > share the same IP. The lagg(4) (link aggregation) virtual interface has > already been mentioned, but I believe it is still only available in > -CURRENT. Other possibilities might include attaching ifconfig scripts > to link up/down events or [lack of] ping responses on one or both > interfaces. > > JN I thought I saw if_lagg MFC'd to RELENG_6 a few weeks back on cvs-src@... After checking cvsweb it is available in RELENG_6. Tom
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4665AE60.7080908>