It took a couple of days ago to the Cisco Catalyst 6509-E in which there were modules only with SFP ports to connect a few links with RJ45.
Since RJ45 links are small, it was more economical to use SFP-RJ45 modules, so they were ordered.
I connected them to the ports WS-X6724-SFP, but nothing was displayed in the logs.
Let’s write commands so that Cisco does not disable ports when inserting unsupported modules:
service unsupported-transceiver no errdisable detect cause sfp-config-mismatch no errdisable detect cause gbic-invalid
I note that the ports WS-X6724-SFP in my case work only at 1Gb speed, so the link will not naturally rise to 100Mb or 10MB, although the Foxgate SFP-RJ45 modules that we had and support 10/100/1000.
In confirmation of this I checked the commands:
configure t interface gigabitEthernet 1/1 speed ?
What was the opportunity to specify the speed of the port only in 1000.
Configure Cisco Catalyst 6509-E