Steps to reproduce:

1. I monitored the brocade san switch  by the snmp used the Template Net Brocade FC SNMPv2
2. I can got the cpu,momory and the fan data,but could not got the interface data
3. I check the host configuration and got the issue: Cannot accurately apply filter: no value received for macro "{#IFALIAS}".

Result:
        could not monitored the san switch interface data by the server zabbix5.0.0 
Expected:
       I wish get the san switch interface data,

       thanks very much.