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 <d...@parkviewmc.com> 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:* listsad...@lists.myitforum.com [mailto:listsadmin@lists. > myitforum.com] *On Behalf Of *CSSU NetAdmin > *Sent:* Friday, November 10, 2017 10:13 AM > *To:* ntsysadm@lists.myitforum.com > *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 < > michealespin...@gmail.com> 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 <cssunetad...@cvsdvt.org> > 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! > > > > >
