parse snmpwalk output to array

Im trying to get network interfaces by doing a snmpwalk, but cannot separate in array, the variable stores all in element 0 ifname=(\$(snmpwalk -Oqv -v2c -c comm xxx.xxx.xxx.xxx 1.3.6.1.2.1.2.2.1.2)) This is inside a heredoc How can i do that?