Listner doesn't survive more than a min

Hi,

I have a virtualbox with Oracle db. Here goes configuration details.

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

I am not very good on lsnr / oracle networking side, still learning basics ... so bear with me

So effectively the problem is everytime, i start my listener, it stays up for a min or two, and then it goes down.

Here is content of my /etc/hosts file

[oracle@ocmgrid11g ~]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
#127.0.0.1              ocmprimary localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
192.xxx.yy.110  ocmprimd.example.com    opd
192.xxx.yy.125  ocmprimary      op
192.xxx.yy.130  ocmsecondary    os
192.xxx.yy.150  ocmgrid11g.example.com  gc
192.xxx.yy.175  ocmtemp.example.com     ot