Helloo,
I tried another way, and read here Eigene Checkplugins schreiben and tried to get along with step 8
I wrote the following arista.py
from .agent_based_api.v1 import *
register.snmp_section(
name = "arista",
detect = startswith(".1.3.6.1.2.1.1.1.0", "Arista"),
fetch = SNMPTree(
base = '.1.3.6.1.2.1.47.1.1.1.1.2',
oids = [
'100305201', # DOM Temperature Sensor for Ethernet5
'100305202', # DOM Voltage Sensor for Ethernet5
'100305211', # DOM TX Bias Sensor for Ethernet5
'100305212', # DOM TX Power Sensor for Ethernet5
'100305213', # DOM RX Power Sensor for Ethernet5
'100315201', # DOM Temperature Sensor for Ethernet15
'100315202', # DOM Voltage Sensor for Ethernet15
'100315211', # DOM TX Bias Sensor for Ethernet15
'100315212', # DOM TX Power Sensor for Ethernet15
'100315213', # DOM RX Power Sensor for Ethernet15
'100325201', # DOM Temperature Sensor for Ethernet25
'100325202', # DOM Voltage Sensor for Ethernet25
'100325211', # DOM TX Bias Sensor for Ethernet25
'100325212', # DOM TX Power Sensor for Ethernet25
'100325213', # DOM RX Power Sensor for Ethernet25
'100329201', # DOM Temperature Sensor for Ethernet29
'100329202', # DOM Voltage Sensor for Ethernet29
'100329211', # DOM TX Bias Sensor for Ethernet29
'100329212', # DOM TX Power Sensor for Ethernet29
'100329213', # DOM RX Power Sensor for Ethernet29
'100330201', # DOM Temperature Sensor for Ethernet30
'100330202', # DOM Voltage Sensor for Ethernet30
'100330211', # DOM TX Bias Sensor for Ethernet30
'100330212', # DOM TX Power Sensor for Ethernet30
'100330213', # DOM RX Power Sensor for Ethernet30
'100337201', # DOM Temperature Sensor for Ethernet37
'100337202', # DOM Voltage Sensor for Ethernet37
'100337211', # DOM TX Bias Sensor for Ethernet37
'100337212', # DOM TX Power Sensor for Ethernet37
'100337213', # DOM RX Power Sensor for Ethernet37
'100339201', # DOM Temperature Sensor for Ethernet39
'100339202', # DOM Voltage Sensor for Ethernet39
'100339211', # DOM TX Bias Sensor for Ethernet39
'100339212', # DOM TX Power Sensor for Ethernet39
'100339213', # DOM RX Power Sensor for Ethernet39
'100341201', # DOM Temperature Sensor for Ethernet41
'100341202', # DOM Voltage Sensor for Ethernet41
'100341211', # DOM TX Bias Sensor for Ethernet41
'100341212', # DOM TX Power Sensor for Ethernet41
'100341213', # DOM RX Power Sensor for Ethernet41
'100342201', # DOM Temperature Sensor for Ethernet42
'100342202', # DOM Voltage Sensor for Ethernet42
'100342211', # DOM TX Bias Sensor for Ethernet42
'100342212', # DOM TX Power Sensor for Ethernet42
'100342213', # DOM RX Power Sensor for Ethernet42
'100343201', # DOM Temperature Sensor for Ethernet43
'100343202', # DOM Voltage Sensor for Ethernet43
'100343211', # DOM TX Bias Sensor for Ethernet43
'100343212', # DOM TX Power Sensor for Ethernet43
'100343213', # DOM RX Power Sensor for Ethernet43
'100344201', # DOM Temperature Sensor for Ethernet44
'100344202', # DOM Voltage Sensor for Ethernet44
'100344211', # DOM TX Bias Sensor for Ethernet44
'100344212', # DOM TX Power Sensor for Ethernet44
'100344213', # DOM RX Power Sensor for Ethernet44
'100345201', # DOM Temperature Sensor for Ethernet45
'100345202', # DOM Voltage Sensor for Ethernet45
'100345211', # DOM TX Bias Sensor for Ethernet45
'100345212', # DOM TX Power Sensor for Ethernet45
'100345213', # DOM RX Power Sensor for Ethernet45
'100346201', # DOM Temperature Sensor for Ethernet46
'100346202', # DOM Voltage Sensor for Ethernet46
'100346211', # DOM TX Bias Sensor for Ethernet46
'100346212', # DOM TX Power Sensor for Ethernet46
'100346213', # DOM RX Power Sensor for Ethernet46
'100347201', # DOM Temperature Sensor for Ethernet47
'100347202', # DOM Voltage Sensor for Ethernet47
'100347211', # DOM TX Bias Sensor for Ethernet47
'100347212', # DOM TX Power Sensor for Ethernet47
'100347213', # DOM RX Power Sensor for Ethernet47
'100348201', # DOM Temperature Sensor for Ethernet48
'100348202', # DOM Voltage Sensor for Ethernet48
'100348211', # DOM TX Bias Sensor for Ethernet48
'100348212', # DOM TX Power Sensor for Ethernet48
'100348213', # DOM RX Power Sensor for Ethernet48
'100349201', # DOM Temperature Sensor for Ethernet49
'100349202', # DOM Voltage Sensor for Ethernet49
'100349211', # DOM TX Bias Sensor for Ethernet49/1
'100349212', # DOM TX Power Sensor for Ethernet49/1
'100349213', # DOM RX Power Sensor for Ethernet49/1
'100349221', # DOM TX Bias Sensor for Ethernet49/2
'100349222', # DOM TX Power Sensor for Ethernet49/2
'100349223', # DOM RX Power Sensor for Ethernet49/2
'100349231', # DOM TX Bias Sensor for Ethernet49/3
'100349232', # DOM TX Power Sensor for Ethernet49/3
'100349233', # DOM RX Power Sensor for Ethernet49/3
'100349241', # DOM TX Bias Sensor for Ethernet49/4
'100349242', # DOM TX Power Sensor for Ethernet49/4
'100349243', # DOM RX Power Sensor for Ethernet49/4
'100350201', # DOM Temperature Sensor for Ethernet50
'100350202', # DOM Voltage Sensor for Ethernet50
'100350211', # DOM TX Bias Sensor for Ethernet50/1
'100350212', # DOM TX Power Sensor for Ethernet50/1
'100350213', # DOM RX Power Sensor for Ethernet50/1
'100350221', # DOM TX Bias Sensor for Ethernet50/2
'100350222', # DOM TX Power Sensor for Ethernet50/2
'100350223', # DOM RX Power Sensor for Ethernet50/2
'100350231', # DOM TX Bias Sensor for Ethernet50/3
'100350232', # DOM TX Power Sensor for Ethernet50/3
'100350233', # DOM RX Power Sensor for Ethernet50/3
'100350241', # DOM TX Bias Sensor for Ethernet50/4
'100350242', # DOM TX Power Sensor for Ethernet50/4
'100350243', # DOM RX Power Sensor for Ethernet50/4
],
),
)
I still can’t find the needed dom values. Maybe one of you can help 
BR