perfSONAR User Q&A and Other Discussion

[Joseph Bernard <>]

I just troubleshot an issue with my ifcfg file with a conflict between PREFIX 
and NETMASK.  When you do a NetInstall and specify a static IP, you will use 
NetworkManager and have to specify a PREFIX.  If you use 
nptoolkit-configure.py or setup to configure the same network interface 
later, it will insert a NETMASK.  PREFIX will override NETMASK.  If the 
network has a different subnet mask, you will have issues.  I deleted the 
PREFIX line to fix my issue.  Just something everyone might want to watch out 
for.  If you use DHCP, this is not an issue.

Thanks,
Joseph B.