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! >> >> >> >> >> > >
