Varun Chandramohan <varunc@xxxxxxxxxxxxxxxxxx> writes:
> Can you send it to net-dev also?
Done.
here's a way to see what really happens:
dhcp232:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:aa:00:ff:00:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.3.232/24 brd 192.168.3.255 scope global eth0
inet6 2001:16d8:ffb4:0:2aa:ff:feff:ff/64 scope global dynamic
valid_lft 2591971sec preferred_lft 604771sec
inet6 fe80::2aa:ff:feff:ff/64 scope link
valid_lft forever preferred_lft forever
dhcp232:~# ifconfig eth0 127.0.0.1
dhcp232:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:aa:00:ff:00:ff brd ff:ff:ff:ff:ff:ff
inet 127.0.0.1/8 brd 127.255.255.255 scope host eth0
inet6 2001:16d8:ffb4:0:2aa:ff:feff:ff/64 scope global dynamic
valid_lft 2591951sec preferred_lft 604751sec
inet6 fe80::2aa:ff:feff:ff/64 scope link
valid_lft forever preferred_lft forever
dhcp232:~# ifconfig eth0 192.168.3.232
dhcp232:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:aa:00:ff:00:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.3.232/24 brd 192.168.3.255 scope host eth0
inet6 2001:16d8:ffb4:0:2aa:ff:feff:ff/64 scope global dynamic
valid_lft 2591933sec preferred_lft 604733sec
inet6 fe80::2aa:ff:feff:ff/64 scope link
valid_lft forever preferred_lft forever
Notice how the scope changes from "global" to "host" when configuring
127.0.0.1, and just never changes back. It will stay that way forever,
or until something changes the scope or deletes the address.
Deleting the addresss and re-adding it will work around the problem:
dhcp232:~# ip addr del 192.168.3.232/24 dev eth0
dhcp232:~# ifconfig eth0 192.168.3.232
dhcp232:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:aa:00:ff:00:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.3.232/24 brd 192.168.3.255 scope global eth0
inet6 2001:16d8:ffb4:0:2aa:ff:feff:ff/64 scope global dynamic
valid_lft 2591963sec preferred_lft 604763sec
inet6 fe80::2aa:ff:feff:ff/64 scope link
valid_lft forever preferred_lft forever
The address can also be deleted using
dhcp232:~# ifconfig eth0 0
if you don't have iproute2 installed.
Bjørn
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