Proper way to link switches X440

[Peter_Donovan]

I am new to Extreme switches and I have a lab setup. I am using X440-24ps. How do I connect

Switch 1 SFP1 to Switch 2 SFP 1
Switch 1 SFP2 to Switch 3 SFP 1
Switch 1 SFP3 to Switch 4 SFP 1
Switch 1 SFP4 to Switch 4 SFP 1

Switch 1 SFP 1 thru 4 are ports 21-24 respectively
Switch 2 SFP 1 are port 24

Physically connecting seems to create issues of lost connectivity so I think I am missing something in the configuration portion.

[Patrick_Voss]

Hello Peter,

Yes, that should work straight out of the box. Can you elaborate on lose connectivity? Are you losing connectivity to the switches or are end users having issues?

[Peter_Donovan]

Sorry,

"Switch 1 SFP4 to Switch 4 SFP 1" should read "Switch 1 SFP4 to Switch 5 SFP 1"

Should this config work straight out of the box? Anything I need to add or recommendations?

Also, does anyone know if there is a model of SFP that is Multi Mode Bi-Directional? I would like to free up strands. I know it is available in Single Mode but was hoping for MM.

Thank You.

[Zdeněk_Pala]

Based on the description you have 2 links going from Switch 1 to switch 4. You need to ceeate link aggregation or block one of those links to not create loop.

[Ram3]

Example output from Lab:
----------------------------------

X440-24p.3 # debug hal show optic-info
Port 21
SFP or SFP+: SFP
Signal: present
TX Fault: no
SFP/SFP+ Vendor: FINISAR CORP.
SFP/SFP+ Part Number: FTLF6529P2BCL-EX
SFP/SFP+ Serial Number: PGK3F19
SFP/SFP+ Manufacture Date: 091107
SFP/SFP+ Type: SFP/SFP+
Connector: LC
GE Compliance: 1000BASE-SX
Wavelength: 850