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nmh
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RB2011UAS SFP Autonegotiation error

Tue Nov 19, 2013 3:15 pm

I have a HP3400cl switch with SFP 1310nm SM connected to the RB2011UAS-IN (v6.6) with a genuine mikrotik SFP installed and i can't get auto negotiation to work.
When i force it to 1000 mbit full duplex it links up, but with incredibly unstable data. (lots of packet loss)
Currently I have this problem at 2 locations and have now recreated it here in my lab setup. on matching equipment.

/Nicklas
 
nmh
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Re: RB2011UAS SFP Autonegotiation error

Tue Nov 19, 2013 4:00 pm

when I disable auto negotiation and use fuld duplex 1000mbit. The HP switch continually logs the following:
FFI: port 21-Excessive CRC/alignment errors.
 
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pcunite
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Re: RB2011UAS SFP Autonegotiation error

Tue Nov 19, 2013 4:52 pm

You're using the S-31DLC20D in the MikroTik unit, correct?
 
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Re: RB2011UAS SFP Autonegotiation error

Wed Nov 20, 2013 4:25 am

Gig-e by nature is auto-negotiation, you cannot force it's mode, doing so will cause the link to not be stable/fail.

Clean your optics with alcohol swap, check fiber optics, and replace sfp if need be.

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