On Fri, Dec 16, 2011 at 07:22:32PM +0000, Alexander Bahoor wrote: > > Greetings, > > > Route metric is a variable that a router uses to choose the best route to a > destination. Depending on the routing protocol, the metric definition is > different. What I'm trying to understand is how Linux defines the metric in > the route output command. > > For example when a Fedora laptop has two active interfaces, Ethernet and > wifi, the metric in route output, is set to 1 for Ethernet and 2 for WiFi. > Reading the man page on the route command, it says the metric is defined as > hop counts to a destination. Based on the above observation, this is > incorrect or incomplete. It definitely include the hop count, but how fedora > came up with 1 and 2. Could it be just used these number arbitrarily to > indicate to IP, that the Ethernet interface is the preferred path to use to > send traffic, because it's speed is faster and more reliable? > Thats pretty much it. If you read the rest of that entry on the man page, the metric is a user assigned value from a routing daemon (or other utlity), to indicate path preference when there is a need to make that determination. The kernel doesnt use it anymore, but some routing daemons do. Neil
> Basically what I'm looking for is the definition of the metric defintion in > Linux or Fedora. And if someone shed light on the windows definition that > would be great. > > Rgrds, > > Alex > > -- > devel mailing list > devel@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/devel -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
