While using low level discovery I used
for the OID and
for both the key and name.
This generates an item like this:
ifInOctets["index", "ifDescr", "1/2/7, 10/100/Gig Ethernet SFP, "to 7705-1.lnbg GE1/1/7 PathC via CRMT""]
However it's not a valid item because the " isn't escaped so zabbix marks the item as Not_supported. It should generate:
ifInOctets["1/2/7, 10/100/Gig Ethernet SFP, \"to 7705-1.lnbg GE1/1/7 PathC via CRMT\""]
I marked this as major because it totally breaks the ability to use lld on many of our routers.
Let me know if you need more information.