思科交换机使用非原厂光模块时，需要如下配置方可使用。
Switch(config-if)#int g1/0/27
Switch(config-if)#service unsupported-transceiver
Warning: When Cisco determines that a fault or defect can be traced to
the use of third-party transceivers installed by a customer or reseller,
then, at Cisco's discretion, Cisco may withhold support under warranty or
a Cisco support program. In the course of providing support for a Cisco
networking product Cisco may require that the end user install Cisco
transceivers if Cisco determines that removing third-party parts will
assist Cisco in diagnosing the cause of a support issue.
Switch(config)#int g1/0/27
Switch(config-if)#no errdisable detect cause gbic-invalid
Switch(config)#int g1/0/27
Switch(config-if)#speed nonegotiate