I'm certainly no expert on this tech, but I've never heard of a situation like this or can I fathom how SFPs could be damaged like this. But the coincidental recurring circumstance? Fascinating!
I wonder what other commonalities could possibly be involved. -- Espi On Fri, Nov 10, 2017 at 12:41 PM, Dave Eldridge <[email protected]> wrote: > wow you got me. > I could see a gbic going bad on one side, but not propagating to the other > side and taking it out also. > > On Fri, Nov 10, 2017 at 12:18 PM, CSSU NetAdmin <[email protected]> > wrote: > >> Once failed, the GBIC's do not work- we swapped them all over. We >> cleaned all connections and have patch cable replacements on order. They >> did give us a copy of the certification report- it looks clean. The only >> reason we put in the 1 GB gbic's is because we don't have 10 GB's spares >> anymore. I am worried that the 1 GB's will fail too in a week or so. >> >> On Fri, Nov 10, 2017 at 12:59 PM, Eldridge, Dave <[email protected]> >> wrote: >> >>> So it failed, you replaced with 10gb gbics and it worked for a short >>> period and it failed again and only now works at 1gb? >>> >>> Just curious if these “failed” gbics work in other fiber runs/switches >>> of yours. >>> >>> >>> >>> You would have to match them at both ends, at least with my cisco’s. >>> >>> I have to say I have had to replace patch fibers before, especially >>> single mode. Don’t be surprised. >>> >>> Have you cleaned all the connectors? The fact it works at the stepped >>> down speed makes me suspicious. >>> >>> Did they give you a print out of the tdr test? >>> >>> dave >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected] >>> orum.com] *On Behalf Of *CSSU NetAdmin >>> *Sent:* Friday, November 10, 2017 10:13 AM >>> *To:* [email protected] >>> *Subject:* Re: [NTSysADM] Interesting Fiber Problem >>> >>> >>> >>> Yes, that is correct. We had to swap out the SFP's on both ends to get >>> it working last Friday and again yesterday. >>> >>> >>> >>> On Thu, Nov 9, 2017 at 9:16 PM, Micheal Espinola Jr < >>> [email protected]> wrote: >>> >>> You are saying that the original SFPs became completely inoperable? >>> Power-cycling or reseating the SFPs had no positive effect? You had to >>> resort to replacing the SFPs with new/different units? You had to do this >>> simultaneously on both ends? >>> >>> >>> -- >>> Espi >>> >>> >>> >>> >>> >>> On Thu, Nov 9, 2017 at 2:26 PM, CSSU NetAdmin <[email protected]> >>> wrote: >>> >>> We have an interesting situation with a dark fiber connection between >>> two of our schools. For 15 months, the connection was great- an HP switch >>> with 10 GB SFP on one end and a Sophos 10 GB SFO on the other. Last >>> Friday, the connection dropped. After switching out the switch, the SFP >>> for the switch and the SFP and port on the Sophos, the connection only came >>> up when we replace the SFP's on both ends. It was fine until today- the >>> connection dropped. We could only bring it back by replacing the SFP's- >>> with 1 GB units because we did not have 10 GB replacements. Last week, our >>> fiber provider test the fiber from both ends and it was clear all the way >>> to other end- which is about 12 miles. We talked to them today and they >>> remain convinced that the fiber is fine. We are going to replace the patch >>> cables next but remain skeptical that it isn't an issue with the fiber >>> somewhere along the line. >>> >>> >>> >>> Does anyone have suggestions on where else to look? Thanks! >>> >>> >>> >>> >>> >> >> >
