add incident 025: ans steer clients into 5 GHz band

master
Gregor Michels 2022-12-23 01:12:37 +01:00
parent 91918091ec
commit 090b8b4709
2 changed files with 32 additions and 0 deletions

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@ -4,3 +4,4 @@ interpreter_python=/usr/bin/python3
gathering=smart
fact_caching=jsonfile
fact_caching_connection=ansible-facts.json
callbacks_enabled = ansible.posix.profile_tasks

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@ -1118,3 +1118,34 @@ all updates where doing using the new "idempotent" `playbook_sysupgrade` (since
* 2022.10.24 01:44 - 01:46: `gw-core01`
=> downtime of the accesspoints in the specified timeframe
=> downtime of `gw-core01` in the specified timeframe
025 2022.11.19 04:00 (ANS) | (maintenance) (try to) steer clients into 5 GHz band
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---
_this log entry was added way after doing the actual work.
Please read it with a grain of salt_
---
**problem**:
* (if i remember correctly) way more clients in the 2,4 GhZ band than in the 5 GHz band (3/4 to 1/4)
**solution**:
* halfe the transmit power in the 2,4 GHz band
* increased transmit power in the 5 GHz band by 1 dBm
* implemented by `5017cb5`
**impact**:
This restarted wifi on all APs at the same time.
Downtime for all clients for a few seconds at 04:00 in the morning.
**validation**:
One day afterwards it seemed like there where more clients in the 5 GHz band (50/50), but the datarates dropped for most of them.
**critisism**:
* placement, transmit power and supported bands of the clients impact 5 GHz utilization
* unsure what actually is the problem
* also did not correctly validate for a few days