add incident 026: ans replace sfp modules

documentation/INCIDENTS.md

@@ -1149,3 +1149,21 @@ One day afterwards it seemed like there where more clients in the 5 GHz band (50
 * 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
+
+
+026 2022.11.20 15:30 (ANS) | (maintenance) replace SFP modules
+--------------------------------------------------------------
+
+---
+
+_this log entry was added way after doing the actual work.
+Please read it with a grain of salt_
+
+---
+
+**intro**:
+The needed SFP modules for `ans` did not arrive in time for the installation.
+Therefore we've installed super old and shitty transcievers (> 10 years old, >70°C, ...) to get a working network.
+
+**impact**:
+* L2 interruption (<= 10 seconds) for all tents