Date: Sat, 19 Sep 2009 13:23:51 -0700 (PDT) From: Barney Cordoba <barney_cordoba@yahoo.com> To: Peter Steele <psteele@maxiscale.com> Cc: net@freebsd.org Subject: Re: Can lagg0 failback be prevented? Message-ID: <491701.32471.qm@web63901.mail.re1.yahoo.com> In-Reply-To: <7B9397B189EB6E46A5EE7B4C8A4BB7CB3042DBE7@MBX03.exg5.exghost.com>
index | next in thread | previous in thread | raw e-mail
--- On Tue, 9/15/09, Peter Steele <psteele@maxiscale.com> wrote: > From: Peter Steele <psteele@maxiscale.com> > Subject: Can lagg0 failback be prevented? > To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> > Date: Tuesday, September 15, 2009, 8:23 PM > We're using the lag driver to provide > automatic failover in case of a network outage. The default > configuration looks like this: > > lagg0: > flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> > metric 0 mtu 1500 > > options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4> > ether 00:a0:d1:e3:58:26 > inet 192.168.17.40 netmask > 0xfffff000 broadcast 192.168.31.255 > inet 192.168.22.11 netmask > 0xffffff00 broadcast 192.168.22.255 > media: Ethernet autoselect > status: active > laggproto failover > laggport: nfe1 flags=0<> > laggport: nfe0 > flags=5<MASTER,ACTIVE> > > If nfe0 was to fail, we get an (almost) automatic failover > to nfe1: > > lagg0: > flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> > metric 0 mtu 1500 > > options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4> > ether 00:a0:d1:e3:58:26 > inet 192.168.17.40 netmask > 0xfffff000 broadcast 192.168.31.255 > inet 192.168.22.11 netmask > 0xffffff00 broadcast 192.168.22.255 > media: Ethernet autoselect > status: active > laggproto failover > laggport: nfe1 > flags=4<ACTIVE> > laggport: nfe0 > flags=1<MASTER> > > The problem we're having is when nfe0 comes online again, a > failback occurs making nfe0 active again. This causes a > momentary network outage that we want to prevent. Is there a > way to configure the lagg device to stay with the currently > active interface, even if the MASTER interface comes back > online? Why don't you just load balance? Usually fallback implies that one link is preferred (such as a more favorable path, or higher speed). Barneyhelp
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?491701.32471.qm>