问题：

我正使用以下命令来up设备

# ifconfig p1p1:1 10.250.0.0 netmask 255.255.0.0 up


# ifconfig p1p1:2 10.251.0.0 netmask 255.255.0.0 up


# ifconfig p1p1:3 10.252.0.0 netmask 255.255.0.0 up

我没有在新设备上安装ifconfig，但有ip命令

可以使用ip addr命令查看系统的ip地址

ip link show输出为：

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT qlen 1


 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00


2: p1p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000


 link/ether 00:ba:e7:ae:ed:3e brd ff:ff:ff:ff:ff:ff


3: p1p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000


 link/ether 00:ba:e7:ae:ed:3f brd ff:ff:ff:ff:ff:ff


4: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000


 link/ether 60:aa:3e:25:47:1f brd ff:ff:ff:ff:ff:ff


5: em2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000


 link/ether 60:aa:3e:25:47:2f brd ff:ff:ff:ff:ff:ff

答案1：

以下示例假定你的网卡名称为eth0。

要打开接口：ip link set eth0 up

要关闭接口：ip link set eth0 down