"ip链路“或"ip addr”输出前面的索引
"ip链路“或"ip addr”输出前面的索引
提问于 2015-03-24 14:34:19
在ip link show或ip addr show输出中，每个网络接口前面都有一个索引。例如，从1到6在这里：
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)，那么使用新的索引：
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:~# 这些指数的目的是什么？有办法根据这些指数进行排序吗？我的意思是，例如，如果我创建了大量的接口(例如for i in {2..5000}; do brctl addbr br"$i"; done)，那么这些接口就不会按照索引号进行排序：
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:~# 回答 1
Unix & Linux用户
发布于 2015-03-24 15:20:38
这些数字只是为了方便和动态计算。
这些数字是动态计算的，因此不应用于引用接口。
更多信息，你可以找到工具.ip链接和工具-ip-addr。
页面原文内容由Unix & Linux提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://unix.stackexchange.com/questions/192213
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