Complex trigger expression in low-level-descovery

[DeepDiver]

I have low-level-discovery rule of SNMPv2 type by SNMP OID ifDescr. Then I create item and trigger prototypes. I want that one trigger worked with GigabitEthernet interfaces and another one with TenGigabitEthernet interfaces, because there is different treshlods for ifHCIn/OutOctets for each.
So I define the followin trigger prototype:
Name:
ifHCInOctets.{#SNMPVALUE} too high
Expression:
{Dynamic SNMP device:ifHCInOctets.["{#SNMPVALUE}"].avg(900)}>600000000

But how to "filter" only GigabitEthernet? I tried to make expression this way:
{Dynamic SNMP device:ifHCInOctets.["{#SNMPVALUE}"].avg(900)}>600000000 & {Dynamic SNMP device:IfDescr.regexp(^GigabitEthernet)}=1

or

{Dynamic SNMP device:ifHCInOctets. "{#SNMPVALUE}"].avg(900)}>600000000 & {{#SNMPVALUE}.regexp(^GigabitEthernet)}=1

and many other variants. As a result, I receive error:
Incorrect host name "#SNMPVALUE" provided in expression. Check expression part starting from <...>

However I even can not save such expression.


In another words - I want to use SNMPVALUE (ifDescr) in expression of trigger prototype.

[DeepDiver]

I found workaound myself.

Create item prototype:
Name - ifDescr.$1
Key - ifDescr.["{#SNMPVALUE}"]
SNMP OID - ifDescr.{#SNMPINDEX}

It will be used just as keys to use with correct trigger depending GigabitEthernet or 10GigabitEthernet.

Then create trigger prototype with following expression:
{Dynamic SNMP device:ifHCInOctets.["{#SNMPVALUE}"].avg(900)}>600000000 & {Dynamic SNMP device:ifDescr.["{#SNMPVALUE}"].regexp(^GigabitEthernet)}=1

And similar for 10GigabitInterfaces:
{Dynamic SNMP device:ifHCInOctets.["{#SNMPVALUE}"].avg(900)}>6000000000 & {Dynamic SNMP device:ifDescr.["{#SNMPVALUE}"].regexp(^10GigabitEthernet)}=1

Hope this will save somebody's time.