<p>I am execute <code>ip a</code> command in kubernetes pod:</p>

<pre><code>/ # ip a
1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
        valid_lft forever preferred_lft forever
1091: eth0@if1092: &lt;BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN&gt; mtu 1450 qdisc noqueue state UP 
    link/ether 02:42:ac:1e:b8:0d brd ff:ff:ff:ff:ff:ff
    inet 172.30.184.13/21 brd 172.30.191.255 scope global eth0
        valid_lft forever preferred_lft forever
</code></pre>

<p>what is meaning of <code>eth0@if1092</code> ? some article said that the <code>1092</code> is the pair sequence no, is there any according? what is <code>if</code> stand for?</p>

Dolphin
<p><code>if1092</code> corresponds to <code>1092th</code> interface on the root network interface. <code>if</code> is short form of <code>interface</code>. The other end of this interface in pod network namespace is attached to a <code>veth</code> interface in root network namespace. The index on that <code>veth</code> interface should also be <code>1092</code>. You can check that by running <code>ip a</code> as <code>root</code> in the node where the pod is running.</p>
