ignore the .local stuff, that's just avahi madness and doesn't seem to be 
related.  Here's what I'm seeing locally when I try this:
I'm noticing from the dnsmasq server that in the leases file, if I start a 
quantal vm I see the hostname. I also see the hostname pop up in the syslog.  
If I start up a raring vm though, I don't see the hostname ever come across.  I 
went to a raring vm and ran dhclient by hand, and everything worked.  The 
hostname was sent with the dhcp request, and I could access the system by 
sshing or pinging the hostname alone.  Running dhcpclient alone uses the 
default config under /etc though.  With NetworkManager in the picture though, a 
different config file is used:

$ ps -ef |grep dhclient
root       733   693  0 21:44 ?        00:00:00 /sbin/dhclient -d -4 -sf 
/usr/lib/NetworkManager/nm-dhcp-client.action -pf 
/run/sendsigs.omit.d/network-manager.dhclient-eth0.pid -lf 
/var/lib/dhclient/dhclient-0f1c7278-f6f0-4447-a3a7-40c0c7c300d6-eth0.lease -cf 
/var/run/nm-dhclient-eth0.conf eth0

$ cat /var/run/nm-dhclient-eth0.conf
# Created by NetworkManager

option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
option ms-classless-static-routes code 249 = array of unsigned integer 8;
option wpad code 252 = string;

also request rfc3442-classless-static-routes;
also request ms-classless-static-routes;
also request wpad;
also request ntp-servers;

If I look another system I have, I see the addition of this line in that file:
send host-name "myhostname"; # added by NetworkManager

So it looks like nm is generating this file without putting the line in
to send the hostname.

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https://bugs.launchpad.net/bugs/1084064

Title:
  Can not ssh to raring VM's using hostname

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