How to make 2 switches talk after connecting with fiber?

[Adam_Joseph]

Hi

First off, I'm very new to this, so please bear with me as I'm learning. I've tried to research this but I don't know the keywords I need.

I have 2 Summit X250e-48P switches. I have managed to create a VLAN, set a DHCP scope, and connect devices. They work great individually.

I have connected them together via the SFP slots with LC connectors (labeled for use with Extreme switches).

Should that be it, or do I need to configure the SFP ports?

Sorry if I haven't given enough information.

[EtherMAN]

Ok one other thing you could look at is seeing what your light levels are if the optics you are using supports this. Most modern sfp do support light readings.

Show port 49 (or 50) transceiver info detail... if your optics supports this command you will get transmit and receive power from both sides. It will help determine if you have any layer one issues...

output from a switch

PLW_X430-24t_SS_W38thSt.1 # sh por 25 trans info det

Port : 25

Media Type : LX
Vendor Name : FINISAR CORP.
Part Number : FTRJ1319P1BTL-EX
Serial Number : P8S0NZ0
Wavelength : 1310 nm

Temp (Celsius) : 41.12 Status : Normal
Low Warn Threshold : -30.00 High Warn Threshold : 93.00
Low Alarm Threshold : -40.00 High Alarm Threshold : 110.00

Voltage AUX-1/Vcc (Volts) : 3.31 Status : Normal
Low Warn Threshold : 2.90 High Warn Threshold : 3.70
Low Alarm Threshold : 2.70 High Alarm Threshold : 3.90

Tx Power (dBm) : -4.31 Status : Normal
Low Warn Threshold : -11.51 High Warn Threshold : -1.00
Low Alarm Threshold : -13.51 High Alarm Threshold : 1.00

Rx Power (dBm) : -6.67 Status : Normal
Low Warn Threshold : -20.00 High Warn Threshold : -1.00
Low Alarm Threshold : -23.97 High Alarm Threshold : 0.75

Tx Bias Current (mA): 21.11 Status : Normal
Low Warn Threshold : 4.00 High Warn Threshold : 70.00
Low Alarm Threshold : 2.00 High Alarm Threshold : 80.00

[Adam_Joseph]

thanks - this definitely clears a few things up for me. But it didn't solve my problem. Modules in use are 850nm and all the cables at MM.

[Adam_Joseph]

but the other switches work on them fine.

ps, thanks for all your quick replies

[Nick_Yakimenko]

fibers between patchpanels may be messed up