What is route metric Linux?
The Metric field indicates the cost of a route. If multiple routes exist to a given destination network ID, the metric is used to decide which route is to be taken. The route with the lowest metric is the preferred route.
What is the metric of a route?
A metric is a value that’s assigned to an IP route for a particular network interface. It identifies the cost that’s associated with using that route. For example, the metric can be valued in terms of link speed, hop count, or time delay.
What is the metric of BGP?
The BGP MED attribute, commonly referred to as the BGP metric, provides a means to convey to a neighboring Autonomous System (AS) a preferred entry point into the local AS. BGP MED is a non-transitive optional attribute and thus the receiving AS cannot propagate it across its AS borders.
What is the metric for static route?
Enter a number from 2 through 15 as the metric value. This value represents the number of routers between your network and the destination. Usually, a setting of 2 or 3 works.
What’s the default metric for a route in Linux?
A Linux kernel hacker would surely be needed to sort that out. Also whatever default is chosen is clearly OS specific. This article ( https://support.microsoft.com/en-us/help/299540/an-explanation-of-the-automatic-metric-feature-for-ipv4-routes) for example shows that Windows choose the default metric based on the bandwidth of the link.
What does metric have a route with no metric?
if nothing is passed to the route command as route metric the value of 1 is used by the command itself. If nothing is passed to the ip command as route metric the attribute is not created at all and kernel understands to it as 0, which is later translated 1024 as default.
How are default metrics created in RHEL 7?
The code for how default metrics are created between the two approaches result in different metric values. For instance: creating an IPv6 default route via ip route will result in a metric value of 1024 on RHEL 7, while creating the same route via route will result in a metric of 1.
Is there a metric 110 on CentOS 7?
No metric 110 on the default via 10.149.247.254 dev enp10s4f0… line. I can confirm this by tracerouting to a host outside of these two networks, packets do get out through 10.149.247.254