Today a user cisco 3850 inserted multimode gigabit optical module error log as follows.

*Oct 18 13:48:54: %PLATFORM_PM-6-MODULE_ERRDISABLE:The inserted SFP module with interface name Gi1/0/18 is not supported

*Oct 18 13:48:54: %PM-4-ERR_DISABLE:gbic-invalid error detected on Gi1/0/18, putting Gi1/0/18 in err-disable state

*Oct 18 13:48:56: %LINK-3-UPDOWN: InterfaceGigabitEthernet1/0/18, changed state to down

Cisco’s official website to view the documentation after processing the following.

3850(config)# no errdisable detect causegbic-invalid

3850(config)# service unsupported-transceiver

Official website document link: https://www.cisco.com/c/en/us/support/docs/interfaces-modules/gbics/200296-Unsupported-GBIC-SFP-in-sub-module-of.html