How do you configure an SFP port on a ISR 2911 router
We have a 2911 ISR, but only one SFP will light up. Two additional SPFs will not lite. The one that lights up is connected to the ISP. We have a switch that we need to connect to, using it's SFP. When we plug the ISP connection into the switches SFP, it lights, so we no the switch is good. Are there licenscing issue or any thing I'm missing?