Hi All,
I have a usage question about netcf. Why netcf can not rename a existing physical interface dynamically by itself? If you have any other method, please share to me, or can we add support for it in netcf? You can see the following steps for details.
Version:
netcf-0.2.4-1.el6.x86_64
kernel-2.6.32-431.el6.x86_64
1. Select a existing NIC from host, for example eth1.
[root@rhel6 ~]# ncftool list --all
eth0
eth1
lo
[root@rhel6 ~]# ncftool dumpxml eth1
<?xml version="1.0"?>
<interface type="ethernet" name="eth1">
<start mode="none"/>
<mac address="00:1B:21:27:4E:CE"/>
<protocol family="ipv4">
<dhcp/>
</protocol>
</interface>
[root@rhel6 ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:1B:21:27:4E:CE
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@rhel6 ~]# ncftool ifup eth1
Interface eth1 successfully brought up
2. Undefine eth1 from host
[root@rhel6 ~]# ncftool ifdown eth1
Interface eth1 successfully brought down
[root@rhel6 ~]# ncftool undefine eth1
eth1 undefined
[root@rhel6 ~]# ncftool list --all
eth0
lo
3. Prepare another xml with same MAC and a new name "jiahu"
[root@rhel6 ~]# cat jiahu.xml
<interface type="ethernet" name="jiahu">
<start mode="none"/>
<mac address="00:1B:21:27:4E:CE"/>
<protocol family="ipv4">
<dhcp/>
</protocol>
</interface>
4. Define the "jiahu", and start it.
[root@rhel6 ~]# ncftool define jiahu.xml
Defined interface jiahu
[root@rhel6 ~]# ncftool dumpxml jiahu
<?xml version="1.0"?>
<interface type="ethernet" name="jiahu">
<start mode="none"/>
<mac address="00:1B:21:27:4E:CE"/>
<protocol family="ipv4">
<dhcp/>
</protocol>
</interface>
[root@rhel6 ~]# ifconfig jiahu
jiahu: error fetching interface information: Device not found
[root@rhel6 ~]# cat /etc/sysconfig/network-scripts/ifcfg-jiahu
DEVICE=jiahu
HWADDR=00:1B:21:27:4E:CE
ONBOOT=no
BOOTPROTO=dhcp
[root@rhel6 ~]# ncftool ifup jiahu
Interface jiahu bring-up failed!
error: failed to execute external program
error: Running 'ifup jiahu' failed with exit code 1: Device jiahu does not seem to be present, delaying initialization.
[root@rhel6 ~]# ll /sys/class/net/
total 0
lrwxrwxrwx. 1 root root 0 May 23 11:32 eth0 -> ../../devices/pci0000:00/0000:00:19.0/net/eth0
lrwxrwxrwx. 1 root root 0 May 23 11:35 eth1 -> ../../devices/pci0000:00/0000:00:1e.0/0000:02:00.0/net/eth1
lrwxrwxrwx. 1 root root 0 May 23 11:32 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx. 1 root root 0 May 23 11:32 virbr0 -> ../../devices/virtual/net/virbr0
lrwxrwxrwx. 1 root root 0 May 23 11:32 virbr0-nic -> ../../devices/virtual/net/virbr0-nic
5. Reboot the host OS, the jiahu interface appeared.
[root@rhel6 ~]# ifconfig jiahu
jiahu Link encap:Ethernet HWaddr 00:1B:21:27:4E:CE
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
BR,
Jianwei
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