Date: Fri, 30 Sep 2011 07:14:22 +1300 From: Andrew Thompson <thompsa@FreeBSD.org> To: Naresh <gbal.naresh@gmail.com> Cc: "freebsd-drivers@freebsd.org" <freebsd-drivers@freebsd.org> Subject: Re: Link aggregation using LACP Message-ID: <CAFAOGNS8AXKdR=cYjh2Hccjaaxndb763hDXZVsh025dmdk31jw@mail.gmail.com> In-Reply-To: <161553F2-FE14-417C-94C6-11ACBD28E06E@gmail.com>
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On 30 September 2011 05:42, Naresh <gbal.naresh@gmail.com> wrote: > Hi All, > > I am working on a 10Gb Ethernet driver for FreeBsd 8.2. When I enable link aggregation using LACP mode on two ports of our card, I expected load to be balanced on two ports(both are up). But interestingly traffic is flowing on only one interface. Have a look at lagg_hashmbuf() which generates the hash number to choose the port. It uses the ethernet and ip headers for this so ensure your test traffic has enough variation. > If I administratively bring down the interface on which traffic is flowing, I see lot of packet loss for about 30 secs, After that it picks up. We don't send a gratuitous arp when the links change, maybe this is causing your switches to not update quickly. We also use the slow lacp timer. Andrewhome | help
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