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“ip link”或“ip addr”输出前面的索引

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“ip link”或“ip addr”输出前面的索引

ip link show每个网络接口的输入或输出前面都有一个索引ip addr show。例如这里的 1 到 6：

root@T42:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:16:41:54:01:93 brd ff:ff:ff:ff:ff:ff
3: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN 
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: irda0: <NOARP> mtu 2048 qdisc noop state DOWN qlen 8
    link/irda 00:00:00:00 brd ff:ff:ff:ff
5: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:13:ce:8b:99:3e brd ff:ff:ff:ff:ff:ff
6: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100
    link/none 
root@T42:~#

现在，如果我删除一个接口（ip link del dev tun0）并创建一个接口（ip tuntap add mode tun），则使用新索引：

root@T42:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:16:41:54:01:93 brd ff:ff:ff:ff:ff:ff
3: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN 
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: irda0: <NOARP> mtu 2048 qdisc noop state DOWN qlen 8
    link/irda 00:00:00:00 brd ff:ff:ff:ff
5: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:13:ce:8b:99:3e brd ff:ff:ff:ff:ff:ff
7: tun0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 500
    link/none 
root@T42:~#

这些索引号的用途是什么？有没有办法根据这些索引号进行排序？我的意思是，例如，如果我创建大量接口（例如for i in {2..5000}; do brctl addbr br"$i"; done），那么这些接口不会按索引号排序：

root@VM-host:~# ip link show | tail
1279: br1246: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/ether 02:de:92:e5:da:b8 brd ff:ff:ff:ff:ff:ff
1023: br990: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/ether c2:35:8b:3a:dd:fa brd ff:ff:ff:ff:ff:ff
767: br734: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/ether da:e9:52:8f:24:dd brd ff:ff:ff:ff:ff:ff
511: br478: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/ether 56:6d:81:a0:71:36 brd ff:ff:ff:ff:ff:ff
255: br222: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/ether a6:92:89:f1:ee:4f brd ff:ff:ff:ff:ff:ff
root@VM-host:~#

答案1

这些数字只是为了方便起见，并且是动态计算的。

这些数字是动态计算的，因此不应用于引用接口。

您可以找到更多信息工具-ip-链接和工具 IP 地址。

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