snmpwalk shows correct value , but the change of status not show in Zabbix

[bisana]

Hi All
I am using “zabbix-1.1beta2” on RHEL4, I am focusing only on snmp way of monitoring .I would like to share my experience
I have this test machine with two network interface , I am trying to monitor their status using Zabbix [snmp]
From the command mode it shows

[john@john snmp]$ snmpwalk 192.168.20.99 -c public IF-MIB::ifOperStatus
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: up(1)
IF-MIB::ifOperStatus.4 = INTEGER: down(2)
[john@john snmp]$

Now if I remove the Eth0 cable , it shows
[john@john snmp]$ snmpwalk 192.168.20.99 -c public IF-MIB::ifOperStatus
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: down(2)
IF-MIB::ifOperStatus.3 = INTEGER: up(1)
IF-MIB::ifOperStatus.4 = INTEGER: down(2)
[john@john snmp]$

ie I am getting the correct result using “snmpwalk” , but this change is not getting by zabbix server , unless and until I restart the my client network service , it should not be behaving this way ,
Would like to give this feed back
thanks
Joseph