着急!熟悉网络配置的请进!关于ifconfig 和ip命令执行的结果.

jgkc

今天下午调试一下午程序,最后才发现系统的ip命令捣鬼,先把测试结果贴出来,哪位能解惑,请客咯(@bj):
1. 第一种情况:
# ifconfig eth1 1.1.2.2 netmask 255.255.255.0
# ip addr ls dev eth1
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.2/24 brd 1.255.255.255 scope global eth1

# ip addr add dev eth1 1.1.2.8/32
# ip addr ls dev eth1
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.2/24 brd 1.255.255.255 scope global eth1
    inet 1.1.2.8/32 scope global eth1

#到这儿还是想要的结果.

# ifconfig eth1 1.1.2.3 netmask 255.255.255.0
# ip addr ls dev eth1                        
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.3/8 brd 1.255.255.255 scope global eth1
    inet 1.1.2.8/24 scope global eth1

#既然指定了 1.1.2.3的mask为24,为什么是8呢??????

# ifconfig eth1 1.1.2.3 netmask 255.255.255.0
# ip addr ls dev eth1                        
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.8/24 scope global eth1
    inet 1.1.2.3/24 brd 1.255.255.255 scope global secondary eth1

#为什么两个IP的掩码都为24呢 ????

# ifconfig eth1 1.1.2.3 netmask 255.255.255.0
# ip addr ls dev eth1                        
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.3/24 brd 1.255.255.255 scope global eth1

#为什么把我的那个1.1.2.8 IP丢掉了????

2.第二种情况,只是后来加入的时候 netmask 参数直接写在了ip(/24)后面.

# ifconfig eth1 1.1.2.2 netmask 255.255.255.0
# ip addr ls dev eth1                        
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.2/24 brd 1.255.255.255 scope global eth1

# ip addr add dev eth1 1.1.2.8/32
# ip addr ls dev eth1            
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.2/24 brd 1.255.255.255 scope global eth1
    inet 1.1.2.8/32 scope global eth1

# ifconfig eth1 1.1.2.3/24
# ip addr ls dev eth1     
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.8/32 scope global eth1
    inet 1.1.2.3/8 brd 1.255.255.255 scope global eth1

# ifconfig eth1 1.1.2.3/24
# ip addr ls dev eth1     
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.3/8 brd 1.255.255.255 scope global eth1
    inet 1.1.2.8/24 scope global eth1

# ifconfig eth1 1.1.2.3/24
# ip addr ls dev eth1     
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.3/8 brd 1.255.255.255 scope global eth1

# ifconfig eth1 1.1.2.3/24
# ip addr ls dev eth1     
12: eth1: <BROADCAST,MULTICAST,PROMISC,UP>; mtu 1500 qdisc pfifo_fast qlen 100
    link/ether 00:c0:4c:39:08:51 brd ff:ff:ff:ff:ff:ff
    inet 1.1.2.3/24 brd 1.255.255.255 scope global eth1  

难道这是IP(ifconfig)命令的bug?
rh7.2 内核2.4.24

jgkc

up

jgkc

    

jgkc

up 一定得解决阿

jgkc

顶

leishili

  
多个IP:ifconfig eth1.1 1.1.2.2 netmask 255.255.255.0
           ifconfig eth1.2 1.1.2.3 netmask 255.255.255.0