Switch: 2930F SFP PoE+ (JL261A)
Hi, two days ago I was configuring a 2930F SFP uplink interface and had to force it to 100 Mbps and auto duplex. I located a 1 Gbps port for testing, but when I tried to reset the speed/duplex settings for the 2930's SFP interface I received a message that said that such settings couldn't be configured on this port.
I tried disabling the port to try changin to full auto setting or forced 1000, but it didn't work. I tried with one of the 1-24 interfaces and the command was accepted without problem.
Finally, out of nowhere I tried again AFTER removing the J8177D module and, finally, I was able to change speed/duplex settings for the interface.
Is this a normal and expected behaviour for SFP and/or SFP+/28/56 interfaces?
Thanks in advance.
Oh, but I did it:
As noted in the AOS-Switch and AOS-CX Transceiver Guide, page 61:
J8177C/J8177D support both 100Mbps and 1G operation in this Switch Series.
However, changing speed settings in an SFP/SFP+ port is not supported while a transceiver is installed and operating.
Thank you, then the right action to do if a speed/duplex change is requiered is to first remove the SFP, make the change, and plug it back.
Correct, but note that this only applies to the J8177C/D RJ45 transceivers, as they are the only supported transceiver that is capable of operating at multiple speeds (all supported optical transceivers operate only at a single speed).
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