192.168.0.1 - spectrum host
*your* - is strings, that your must/can change

p.s. I think, this configs is not ideal, but it's work:)

bash-3.2# cat /etc/snmpd.conf
### Begin config file
logging         /var/tmp/snmpd.log              enabled
logging         size=100000                     level=0
community        public  127.0.0.1 255.255.255.255
view            1.17.2          system enterprises view
trap            public          127.0.0.1       1.2.3   fe      # loopback
smux            1.3.6.1.4.1.2.3.1.2.1.2         gated_password  # gated
smux            1.3.6.1.4.1.2.3.1.2.2.1.1.2     dpid_password   #dpid
syslocation  "your_location"
syscontact   "your_contact"
snmpd maxpacket=1024 querytimeout=120 smuxtimeout=200 smuxtrapaddr=0
community    your_snmp_community_RO   192.168.0.1   255.255.255.0   readOnly
trap         your_snmp_community      192.168.0.1
smux         0.0                           ""     0.0.0.0         0.0.0.0
smux         1.3.6.1.4.1.2.3.1.2.3.1.1     muxatmd_password  # muxatmd
smux         1.3.6.1.4.1.2.3.1.2.1.5       clsmuxpd_password # HACMP/ES for AIX clsmuxpd
### End config file

bash-3.2# cat /etc/snmpdv3.conf
### Begin config file
VACM_GROUP group1 SNMPv1  public  -
VACM_VIEW defaultView        1.3.6.1.4.1.2.2.1.1.1.0    - included -
VACM_VIEW defaultView        1.3.6.1.4.1.2.6.191.1.6    - included -
VACM_VIEW defaultView        snmpModules                - excluded -
VACM_VIEW defaultView        1.3.6.1.6.3.1.1.4          - included -
VACM_VIEW defaultView        1.3.6.1.6.3.1.1.5          - included -
VACM_VIEW defaultView        1.3.6.1.4.1.2.6.191        - excluded -
VACM_ACCESS  group1 - - noAuthNoPriv SNMPv1  defaultView - defaultView -
NOTIFY notify1 traptag trap -
TARGET_ADDRESS Target1 UDP 127.0.0.1       traptag trapparms1 - - -
TARGET_PARAMETERS trapparms1 SNMPv1  SNMPv1  public  noAuthNoPriv -
COMMUNITY public     public     noAuthNoPriv 0.0.0.0    0.0.0.0         -
VACM_GROUP your_string_group1   SNMPv1        your_snmp_community_RO  -
VACM_GROUP your_string_group2   SNMPv2c       your_snmp_community_RO  -
VACM_GROUP your_string_group3   SNMPv2c       your_snmp_community     -
COMMUNITY your_snmp_community_RO  your_snmp_community_RO noAuthNoPriv   192.168.0.1 255.255.255.0  -
VACM_VIEW  your_string_view     internet                 -         included  -
VACM_VIEW  your_string_view     directory                -         included  -
VACM_VIEW  your_string_view     mgmt                     -         included  -
VACM_VIEW  your_string_view     experimental             -         included  -
VACM_VIEW  your_string_view     private                  -         included  -
VACM_VIEW  your_string_view     mib-2                    -         included  -
VACM_VIEW  your_string_view     aix                      -         included  -
VACM_VIEW  your_string_view     ibm                      -         included  -
VACM_VIEW  your_string_view     system                   -         included  -
VACM_VIEW  your_string_view     enterprises              -         included  -
VACM_VIEW  your_string_view     interfaces               -         included  -
VACM_VIEW  your_string_view     tcp                      -         included  -
VACM_VIEW  your_string_view     icmp                     -         included  -
VACM_VIEW  your_string_view     udp                      -         included  -
VACM_VIEW  your_string_view     snmp                     -         included  -
VACM_VIEW  your_string_view     snmpEngine               -         included  -
VACM_VIEW  your_string_view     snmpModules              -         included  -
VACM_VIEW  your_string_view     snmpMPDStats             -         included  -
VACM_VIEW  your_string_view     usmStats                 -         included  -
VACM_VIEW  your_string_view     ibmAgents                -         included  -
VACM_VIEW  your_string_view     1.3.6.1.4.1.2.2.1.1.1.0  -         included  -
VACM_VIEW  your_string_view     1.3.6.1.2.1.25           -         included  -
VACM_ACCESS  your_string_group1  - - noAuthNoPriv   SNMPv1        your_string_view - your_string_view -
VACM_ACCESS  your_string_group2  - - noAuthNoPriv   SNMPv2c       your_string_view - your_string_view -
VACM_ACCESS  your_string_group3  - - noAuthNoPriv   SNMPv2c       your_string_view - your_string_view -
smux        0.0                           ""     192.168.0.1  255.255.255.0
smux         1.3.6.1.4.1.2.3.1.2.2.1.1.2     dpid_password   #dpid
smux         1.3.6.1.4.1.2.3.1.2.3.1.1     muxatmd_password  # muxatmd
smux         1.3.6.1.4.1.2.3.1.2.1.5       clsmuxpd_password # HACMP/ES for AIX clsmuxpd
TARGET_ADDRESS  Target_your_string       UDP     192.168.0.1 traptag trapparms_your_string   - - -
TARGET_PARAMETERS trapparms_your_string  SNMPv2c SNMPv2c       your_snmp_community   noAuthNoPriv  -
NOTIFY notify_your_string traptag trap -
# Uncomment dpid2 in /etc/rc.tcpip
DEFAULT_SECURITY no-access - -
logging         file=/usr/tmp/snmpdv3.log       enabled
logging         size=100000                     level=0
smux            1.3.6.1.4.1.2.3.1.2.1.2         gated_password  # gated
### End config file


Check this proccesses from shell:

ps auxwwww| egrep -e snmpd -e hostmibd -e aixmibd -e snmpmibd -e dpid2 -e muxatmd -e gated | grep -v grep

stopsrc -s'dpid2'
stopsrc -s'aixmibd'
stopsrc -s'hostmibd'
stopsrc -s'snmpmibd'
stopsrc -s'muxatmd'
stopsrc -s'snmpd'

startsrc -s'snmpd'
startsrc -s'muxatmd'
startsrc -s'snmpmibd'
startsrc -s'hostmibd'
startsrc -s'aixmibd'
startsrc -s'dpid2'

ps auxwwww| egrep -e snmpd -e hostmibd -e aixmibd -e snmpmibd -e dpid2 -e muxatmd -e gated | grep -v grep