Cascading switches via fiber

[smg]

I have two Adtran 1550 24P switches that I want to connect via fiber. 

I have also set up several connected to a fiber patch panel without issue.

I am using TRENDnet TEG-10GBSR SFP with  a fiber optic cable VS LCLC 10G DPX PVC. I have swapped out the ends on one end so I have black red on one and red black on the other.

I have tried them with both switches set to Auto and both set to 10Gbps/full, new cable, new gbic. They don't seem to connect at all. 

I can connect them via ethernet without issue. 

What am I missing?!

[BradR]

That is not an SFP that I am familiar with, but can you confirm that it is being recognized by the switch?

# sh sfp-info interface xgigabit-switchport <Slot/Port>

The red and blacks should go to the same side on both switches. If you swap those around, you are trying to send on the receive and receive on the send. 

[smg]

Sorry, I missed this update. Your response went to my spam.

Thank you for clarifying the cabling. I have tried it both ways thinking that was the issue. When I looked at another that is in place, it seemed to have them swapped. I will change this back. 

I am not having success with this command from putty in enabled mode:

# sh sfp-info interface xgigabit-switchport 0/1

Is there something I am doing wrong? I am not adding the # 😉

Under show running-config, it shows this for that port:

interface xgigabit-switchport 0/1
no shutdown
switchport mode trunk
speed 10000

That is the same speed I have on the other end. But even when both are set to auto, it doesn't seem to recognize anything.

Edit to add:

command/results:

show sfp-info interface xgigabit-switchport 0/1
SFP module information is not available.

So they are not recognizing the sfp. But we have been using these sfp's for all our adtran 1550s.

I even had a third one to swap out.  Odd that I would have 3 bad SFPs straight out of the box. 

I was hoping it was something I was missing on the switch.

[BradR]

Below is the command from a 1550 with the response output. If you get "SFP module information is not avialable" it indicates it is not recognizing the SFP.

Syntax: show sfp-info interface <xgigabit-switchport> <slot/port>

switch#show sfp-info interface xgigabit-switchport 0/1

SFP Manufacturer: Adtran
Identifier: SFP Transceiver
Connector: LC
SONET Compliance Code: Unspecified
Gigabit Ethernet Compliance Code: 1000BASE-SX
Fiber Channel Link Length: Short Distance (S)
Fiber Channel Transmitter Technology: Shortwave Laser w/o OFC (SN)
Fiber Channel Transmission Media: Multi-Mode, 62.5m (M6)
Fiber Channel Speed: 100 MB/sec
Encoding: 8B10B
Nominal Bit Rate: 1300 Mb/s
.......

[smg]

When I ran this on Friday, I got SFP module information is not avialable. 

Today I am getting (both for Auto and 10GBps/Full modes): 

SFP Manufacturer: TRENDnet
Identifier: SFP Transceiver
Connector: LC
SONET Compliance Code: Unspecified
Gigabit Ethernet Compliance Code: 10000BASE-LX
Fiber Channel Link Length: Unspecified
Fiber Channel Transmitter Technology: Unspecified
Fiber Channel Transmission Media: Unspecified
Fiber Channel Speed: Unspecified
Encoding: Unspecified
Nominal Bit Rate: 10000 Mb/s
Supported Single-Mode Link Length (Km units): Unspecified
Supported Single-Mode Link Length (m units): Unspecified
Supported Multi-Mode(50micron) Link Length: 80 m
Supported Multi-Mode(62.5micron) Link Length: 30 m
Supported Link Length Copper: Unspecified
Vendor OUI: Unspecified
Vendor Part Number: TEG-10GBSR
Vendor Revision: V2.1
Options: LOS, TX_FAULT, TX_DISABLE, RATE_SELECT
Bitrate, Max: Unspecified
Bitrate, Min: Unspecified
Laser Wavelength: Unspecified
Vendor Serial Number: RA8GSR2100206
Datecode: Aug 6, 2018
Tx Power: 0.65mW
Temperature: 27 Celsius

Are there different SFPs for cascading vs going through a fiber patch panel? Most of our fiber is via patch panel. And we use these on all of them for this. 

[smg · Accepted solution]

In the end I found that I had 1 TRENDnet TEG-10GBSR SFP v1.0 and the other end had a  v2.1R model. 

I switched them both to  v2.1R model sfp.  Still nothing. I swapped the ends on one and then it connected.