Sunday, May 5, 2019

Dumb question about Cisco Auto-QOS

Hi guys, dumb question...

We're doing a switch refresh with Catalyst 9k switches, and I'm not super familiar with Auto-QOS, being that our old switches used MLS QOS. Our hardware VOIP phones & softphones (we have a mix of both) tag DSCP, so do I...

  • Apply "auto qos trust dscp" to the access ports, and "auto qos voip trust" to the switch uplinks?
  • Or should I just apply "auto qos trust dscp" everywhere?

From what I can tell they both do the same thing, but the Cisco Auto-QOS documentation mentions using "auto qos voip trust" specifically for interfaces connected to other switches or routers. So I'm not really sure what to choose.



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