QoS class has a priority and no guaranteed bandwidth
At a glance
Base severity
Area
Platform
Evidence level
Benchmark reference
Reads the export, not the device
ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.
Why it matters
PAN-OS honors priority when the link is congested, and a class with no guaranteed bandwidth has nothing to fall back on when it is. The configuration reads as protected traffic and behaves like the rest of it, which is the case the setting was made to prevent.
How to fix it
Web interface
The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.
- Set a guaranteed bandwidth on the class, sized to what the traffic actually needs.
- Keep the sum of the guarantees below the interface egress maximum.
- Leave low-priority classes without a guarantee deliberately, so the protected ones have room.
Command line
PAN-OS CLI
set network qos-profile <object-name> class-bandwidth-type mbps class <qos-class> class-bandwidth egress-guaranteed <guaranteed-mbps>An example. Values in angle brackets are yours to supply; a finding on your own export fills in the names it read. Nothing here commits. Review the candidate configuration, then commit it yourself.
Read it back
show network qos-profile <object-name>Values to fill in3
- <object-name>
- The object's name, as it appears on your firewall
- <qos-class>
- The QoS class
- <guaranteed-mbps>
- The guaranteed bandwidth in megabits per second
Before you type it1
- QoS needs a profile with bandwidth in it and an interface that uses the profile. One without the other shapes nothing.
How to confirm the fix
- Confirm the class reports a guaranteed bandwidth.
- Confirm the guarantees across classes do not exceed the interface egress maximum.
Limits
- This reads the configured bandwidth, not what the class received during any real period of congestion.
Compliance references
No benchmark recommendation is mapped to this control in this version.
More in QoS
- PAN-SEC-070QoS is enabled on an interface that shapes nothing
- PAN-SEC-071QoS rule assigns a class with no bandwidth anywhere
- PAN-SEC-073QoS rule matches all traffic
- PAN-SEC-083QoS policy rules exist and QoS is enabled on no interface
- PAN-SEC-084QoS is enabled on an interface and no QoS policy rule classifies traffic
See it on your own firewall
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