Hi, At office, we have I ISPs. I want to lightly monitor each link latency in order to decide several routing. For that, I have only one external server: 1 IP, it's an OVH dedicated server. The quick picture is http://s24.postimg.org/n3436z64l/defaul_route.png Default route is via ISP1. If OVH-server pings IP1: - the request will go through ISP1: it's OK - the reply will go through ISP1: it's OK If OVH-server pings IP2: - the request will go through ISP2: it's OK - the reply will go through ISP1: it's KO because the metric will involve ISP1 How could I tell the Office gateway (CentOS 6) "IF you reply to a ping request from the OVH server that came on IP2 THEN route it via IP2" -- +261 34 81 738 69
Am 15.11.2013 04:43, schrieb Mihamina RKTMB:> Hi, > > At office, we have I ISPs. > > I want to lightly monitor each link latency in order to decide several > routing. > For that, I have only one external server: 1 IP, it's an OVH dedicated > server. > The quick picture is http://s24.postimg.org/n3436z64l/defaul_route.png > > Default route is via ISP1. > If OVH-server pings IP1: > - the request will go through ISP1: it's OK > - the reply will go through ISP1: it's OK > > If OVH-server pings IP2: > - the request will go through ISP2: it's OK > - the reply will go through ISP1: it's KO because the metric will > involve ISP1 > > How could I tell the Office gateway (CentOS 6) > "IF you reply to a ping request from the OVH server that came on IP2 > THEN route it via IP2"You may study http://www.lartc.org/lartc.html to find out how to handle 2 uplinks. Alexander
You should be careful of doing any kind of network latency sensitive work with providers such as OVH. The latency of their networks can be very unstable. You can end up in a flip flopping state very easily. On 15 November 2013 03:43, Mihamina RKTMB <mihamina at rktmb.org> wrote:> Hi, > > At office, we have I ISPs. > > I want to lightly monitor each link latency in order to decide several > routing. > For that, I have only one external server: 1 IP, it's an OVH dedicated > server. > The quick picture is http://s24.postimg.org/n3436z64l/defaul_route.png > > Default route is via ISP1. > If OVH-server pings IP1: > - the request will go through ISP1: it's OK > - the reply will go through ISP1: it's OK > > If OVH-server pings IP2: > - the request will go through ISP2: it's OK > - the reply will go through ISP1: it's KO because the metric will > involve ISP1 > > How could I tell the Office gateway (CentOS 6) > "IF you reply to a ping request from the OVH server that came on IP2 > THEN route it via IP2" > > > > -- > +261 34 81 738 69 > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos