Steps to reproduce:

1. I monitored the brocade san switch  by the snmp used the Template  Brocade FC by SNMP
2. I can got the cpu,memory and the fan data,but could not got the Network 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 zabbix6.0.23
Expected:

  I wish get the san switch interface data,

  thanks very much.