Are you using Network Manager? Or have you configured your clients using "/etc/network/interfaces"?<br><br><div class="gmail_quote">2012/2/21 Zhe Yao <span dir="ltr"><<a href="mailto:zheyao@cim.mcgill.ca">zheyao@cim.mcgill.ca</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All,<br>
<br>
We are running several machines, some of them are ubuntu 10.04 which<br>
has dhcp3-client (3.1.3), and others run ubuntu 11.10 which has<br>
isc-dhcp-client (4.1.1).<br>
We notice different behaviours between these two versions.<br>
<br>
When the dhcp server (from ISC as well) is offline for a while, the<br>
clients decide to give up trying to contact the server any more, they<br>
assign private ip addresses (169.254.*) to the network interfaces.<br>
After this happens, the dhcp client (3.1.3) on 10.04 is still running<br>
in the background, so as far as the server is back, new ip addresses<br>
are assigned from the server, and everything is back to normal.<br>
But for dhcp client (4.1.1) on 11.10, the client daemon suicides.<br>
Hence, even the server is back, the network interface stays with the<br>
private addresses until we have to manually invoke ifdown/ifup<br>
commands, which is impossible for remote management.<br>
<br>
We are wondering whether this is a feature or a bug.<br>
Any input appreciated.<br>
<br>
Best,<br>
Zhe Yao<br>
--------------<br>
Department of Electrical and Computer Engineering<br>
McGill University<br>
Montreal, QC, Canada<br>
H3A 2A7<br>
<br>
<a href="mailto:zhe.yao@mail.mcgill.ca">zhe.yao@mail.mcgill.ca</a><br>
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</blockquote></div><br>