I have a problem with switch extreme X620-16T (10G) (IMG 220.127.116.11), SFP transceivers are used (therefore at 1G). I do the following steps:
- Set auto negotiation to off, speed 1000, full duplex, I save the configuration
- I enter the transceiver in the port, it is recognized as 1000T, I save the configuration.
Downstream are connected other switches (extreme x440-24t) and some PCs.
Everything works. (Repeat I saved configuration).
I reboot X620-16T, the auto-negotiation becomes "ON" and there is no communication with the other switches, while with the PC everything is OK.
In the x440-24t, switch ports have auto negotiation on.
Possible solutions? Thank you