Multiple link up/down traps seen for a single event

I have enabled the link up/down notifications of IF MIB by adding
"linkUpDownNotifications yes" in the snmpd.conf file.

The trap manager is receiving multiple traps for an interface for a single
event(up/down) at the same time .

Is this a known issue in net-snmp version 5.4 ?
If not, can somebody please guide me to the origin of the problem.

The configuration as seen in the file snmpd.conf :

*createUser xyz MD5 "orgnaization Admin"
rouser xyz
iquerySecName xyz
agentSecName xyz
linkUpDownNotifications yes
trap2sink 127.0.0.1 public 162
rocommunity public*

sample trap log:
*2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP:
[76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417928) 5 days,
17:16:19.28 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10
2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP: [76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417928) 5 days,
17:16:19.28 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10
2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP: [76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417928) 5 days,
17:16:19.28 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10
2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP: [76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417929) 5 days,
17:16:19.29 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10
2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP: [76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417929) 5 days,
17:16:19.29 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10
2009-01-05 15:23:30 nc-76-6-2-2.dhcp.embarqhsd.net [UDP: [76.6.2.2]:-32764]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (49417929) 5 days,
17:16:19.29 SNMPv2-MIB::snmpTrapOID.0 = OID: IF-MIB::linkUp
SNMPv2-MIB::snmpTrapEnterprise.0 = OID: SNMPv2-SMI::enterprises.9.3.2.10*
-- 
Thanks,
Manisha

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