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jsenin/howto_snmp_hex_values_to_date_time.txt

Created June 9, 2020 10:21
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understand snmp hex values to extract date time values
Raw
howto_snmp_hex_values_to_date_time.txt
extract values using snmp-walk
# filter by dates 07E4 -> 2020 year
snmpwalk -v2c -c community gpon.my.net 1.3.6.1.4.1.2011.6.128.1.1.2 | grep "07 E4"
# mibs from https://code.getnoc.com/noc/noc/-/blob/master/cmibs/huawei_xpon_mib.py
"HUAWEI-XPON-MIB::hwGponDeviceOltLastUpTime": "1.3.6.1.4.1.2011.6.128.1.1.2.21.1.17",
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.21.1.17.4194304000 = Hex-STRING: 07 E4 06 09 0A 2E 07 00 2B 02 00
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.21.1.17.4194304768 = Hex-STRING: 07 E4 02 13 0A 0E 00 00 2B 01 00
"HUAWEI-XPON-MIB::hwGponDeviceOltLastDownTime": "1.3.6.1.4.1.2011.6.128.1.1.2.21.1.18",
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.21.1.18.4194304000 = Hex-STRING: 07 E4 06 09 0A 2D 38 00 2B 02 00
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.21.1.18.4194304768 = Hex-STRING: 07 E4 02 13 11 30 38 00 2B 01 00
"HUAWEI-XPON-MIB::hwGponDeviceOntControlLastUpTime": "1.3.6.1.4.1.2011.6.128.1.1.2.46.1.22",
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.46.1.22.4194304000.0 = Hex-STRING: 07 E4 06 09 0A 2E 09 00 2B 02 00
"HUAWEI-XPON-MIB::hwGponDeviceAutoFindOntInfoOntAutoFindTime": "1.3.6.1.4.1.2011.6.128.1.1.2.48.1.8",
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.48.1.8.4194304000.0 = Hex-STRING: 07 E4 04 0F 0F 0B 14 00 2B 02 00
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.48.1.8.4194304000.1 = Hex-STRING: 07 E4 06 08 11 1C 23 00 2B 02 00
"HUAWEI-XPON-MIB::hwGponDeviceOntRegisterTime": "1.3.6.1.4.1.2011.6.128.1.1.2.52.1.4",
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.52.1.4.4194304000.0 = Hex-STRING: 07 E4 02 11 11 0F 08 00 2B 01 00
SNMPv2-SMI::enterprises.2011.6.128.1.1.2.52.1.4.4194304000.1 = Hex-STRING: 07 E4 06 08 11 1C 23 00 2B 02 00
import struct
ts = [
'\x07\xE4\x06\x09\x0A\x2E\x07\x00\x2B\x02\x00',
'\x07\xE4\x02\x13\x0A\x0E\x00\x00\x2B\x01\x00',
'\x07\xE4\x06\x09\x0A\x2D\x38\x00\x2B\x02\x00',
'\x07\xE4\x02\x13\x11\x30\x38\x00\x2B\x01\x00',
'\x07\xE4\x06\x09\x0A\x2E\x09\x00\x2B\x02\x00',
'\x07\xE4\x04\x0F\x0F\x0B\x14\x00\x2B\x02\x00',
'\x07\xE4\x06\x08\x11\x1C\x23\x00\x2B\x02\x00',
'\x07\xE4\x02\x11\x11\x0F\x08\x00\x2B\x01\x00',
'\x07\xE4\x06\x08\x11\x1C\x23\x00\x2B\x02\x00',
]
for oct in ts:
struct.unpack('>HBBBBBBBBB', oct)
(2020, 6, 9, 10, 46, 7, 0, 43, 2, 0)
(2020, 2, 19, 10, 14, 0, 0, 43, 1, 0)
(2020, 6, 9, 10, 45, 56, 0, 43, 2, 0)
(2020, 2, 19, 17, 48, 56, 0, 43, 1, 0)
(2020, 6, 9, 10, 46, 9, 0, 43, 2, 0)
(2020, 4, 15, 15, 11, 20, 0, 43, 2, 0)
(2020, 6, 8, 17, 28, 35, 0, 43, 2, 0)
(2020, 2, 17, 17, 15, 8, 0, 43, 1, 0)
(2020, 6, 8, 17, 28, 35, 0, 43, 2, 0)
# year/month/day/hour/minute/second/0/decisecond/time zone/+ = 0, - = 1
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