title: How to create a zabbix problem whenever a cisco switch interface utilizes more than 80 mbps (80% of it's bandwidth)
body: <p>I'm trying to create a trigger in zabbix which will show me a problem and alert me on my email whenever an interface in a cisco switch (with snmpv2) crosses 80% of it's bandwidth (100 mbps or 1000 mbps) without hardcoding anything, I tried using this trigger expression:</p>
  
  <p><code>{/switch name:net.if.out[ifHCOutOctets./switch interface].min(10)}>80000000</code></p>
  
  <p>I would like to know how can I write this trigger expression which works fine without applying it to every single interface item in every switch. I think that maybe macros could help in these situations but found no explanation or any guide about how to use them or how to use low level discovery which maybe have a part at the solution for my need.
  Thanks in advance.</p>