I am using ubuntu gnome 14.04. My question is closely related to following question on Askubuntu:
In addition to taking long time to connect to wired network after wake up, I am facing trouble with connecting to my work network. It keeps trying to acquire network connection for long time (sometimes even more than 45 minutes) and then suddenly connects. At home it starts with 192.... IP address but then restarting network solves the problem. But restarting network, even rebooting computer doesn't help while trying to connect to work network.
I looked into the syslog (after reading other question) and see that it keeps sending
DHCPREQUEST of "my home dynamic IP address" on eth0 to 255.255.255.255 port 67 (xid=0x4f216654)
And finally after long long time it gets
DHCPNAK from "my work dynamic IP address"
After which wired network start working.
I am just a user and do not understand what these entries mean. But does this mean that when I shut down my laptop at home the network manager does not release the home IP address?
How can I fix this issue?