- The author's home LAN 10Gb/s upgrade used 10GBASE-T SFP+ modules, which ran hot, causing one module to overheat and flap (shut down and restart) when temperatures reached ~95°C.
- Research revealed two generations of 10GBASE-T SFP+ modules: older Marvell-based ones (hot) and newer Broadcom-based ones (more efficient). The author's MikroTik S+RJ10 was Marvell-based.
- The author purchased a 10Gtek ASF-10G-T80-INT (Broadcom BCM84891 chip) from Amazon, replacing the faulty module. Installation was tricky due to the latch mechanism.
- After replacement, the switch could not report the new module's temperature (likely because it impersonated a fiber-optic module), but network stability improved and the switch's CPU temperature dropped by about 5°C.
- The author concludes the replacement was successful, with no further flapping and better thermal performance, though long-term durability remains to be seen in Lisbon's summer.
- Monitoring the new module's temperature is not possible via SNMP, but the absence of flapping and lower CPU temperature indicate improvement.