Dynamic indexes on HP Switch - zero value

[Cirrus]

Hello,

HP Switch returns zero counter value if previous index request were done before less than 0.5 second:

root@zabbix:~# snmpwalk -v2c -c public my_snmp_host ifName.290 ; snmpwalk -v2c -c public my_snmp_host ifInOctets.290
IF-MIB::ifName.290 = STRING: Trk1
IF-MIB::ifInOctets.290 = Counter32: 0

root@zabbix:~# snmpwalk -v2c -c public my_snmp_host ifName.290 ; sleep .4; snmpwalk -v2c -c public my_snmp_host ifInOctets.290
IF-MIB::ifName.290 = STRING: Trk1
IF-MIB::ifInOctets.290 = Counter32: 0

root@zabbix:~# snmpwalk -v2c -c public my_snmp_host ifName.290 ; sleep .5; snmpwalk -v2c -c public my_snmp_host ifInOctets.290
IF-MIB::ifName.290 = STRING: Trk1
IF-MIB::ifInOctets.290 = Counter32: 922516504

Is there any configuration to put a delay between index and couter request? Or do I have to configure external check?

Regards,
Cirrus