In a community discussion [1] all users who checked did not have the 'fq_codel' queuing discipline active on one or both of their 'red0' and 'imq0' interfaces. Instead the 'htb' qdisc was in use. I expect that the 'fq_codel' qdisc is used for uplink and downlink when QoS is enabled. 'fq_codel' was mentioned back when it was first implemented (regarding "bufferbloat") and the wiki still mentions it specifically. I noticed this problem from syslog messages: May 9 16:01:25 ipfire root: Could not find a bridged zone for imq0 May 9 16:01:25 ipfire codel: Codel AQM could not be enabled on 'imq0'. Error code: 2 May 9 16:01:25 ipfire ipfire: QoS started May 9 16:01:25 ipfire vnstatd[2306]: Interface "imq0" enabled. These had happened for some time on my system. I can search history if required. 1. PARTIAL FIX The "Error code: 2" above is from the IPFire "enable_codel" script. It incorrectly uses the 'add' argument not 'replace'. The manual page for the 'tc' utility states: " replace Performs a nearly atomic remove/add on an existing node id. If the node does not exist yet it is created. " Therefore I suggest changing 'add' to 'replace' in enable_codel. 2. SECOND PROBLEM However this is not a complete fix. When I manually changed the script only the imq0 interface had fq_codel set after a QoS restart, not red0. Even a fresh reboot results in 'htb' being set for both uplink and downlink on my system. 3. THIRD PROBLEM If I used 'tc' to manually replace 'htb' with 'fq_codel' all rrdtool graphs on the QoS page in the WUI stopped working. I do not know the cause and did not troubleshoot further. I wonder if there is a relationship with bridging being enabled. On my system I have bridged the GREEN interface to allow a VM hosted on my IPFire system to use that network. Not all users in the community thread reported using Bridging. My fireinfo is https://fireinfo.ipfire.org/profile/12a8c1b37699b320895097608705c5cc374254a9 As always, thank you in advance! Refs: [1] https://community.ipfire.org/t/qos-warning-about-aqm-codel-not-being-enabled/5372/5
This bug report lacks basic understanding of how QoS works. 1) You cannot have fq_codel and HTB at the same time. CoDel is employed in the subclasses 2) imq0 does not have/need fq_codel 3) Graphs stop working when you disable the QoS