[CentOS] delay in establishing network connectivity

hello,

centos 7


If the system (wired static IP#) is powered down
and stayed powered down for some period: let
say 48 hours or so ....  when it is rebooted again it
can not establish a network connectivity
for some time: 7 to 15 minutes and then
everything network wise is fine...

I am unable to spot any errors in various system logs.

If you think this is on the OS/system side ....
where do you think I should look to hunt down
some parameter or settings that maybe causing this?



thank you,
F-