Question : AWK and splitting a string into an array

Wrote a script to pull all the various Interface IPs from a list of routers.  Output from snmpwalk is in the following format:
ipAdEntIfIndex.192.168.100.106 = INTEGER: 10

Want to add a pipe to the end of my snmpwalk statement that would run it through awk and then output just the ip address (192.168.100.106).  Pretty sure I need to split this into an array within awk and then tweak the formatting but have never done this before.  Any assistance would be appreciated.

Thanks.

Answer : AWK and splitting a string into an array

echo "ipAdEntIfIndex.192.168.100.106 = INTEGER: 10" | awk -F'[. ]' '{OFS=".";print $2,$3,$4,$5}'