topic cant the x450-g2 sync up at 100mbps fiber on the sfp port? in ExtremeSwitching (EXOS/Switch Engine)

cant the x450-g2 sync up at 100mbps fiber on the sfp port?

Keith9 — Tue, 02 Jun 2020 08:25:12 GMT

Hello. We have an ATM machine in a hospital campus that is too far for Ethernet. It’s been connected using a TP-Link 100mbps fiber optic media converter for years. The other end is the same 100mbps grey box into a Cisco switch.

Now the connections are terminating to a new facility within the Hospital. Our new facility has the X450-G2. Rather than move the TP-Link box to that rack, across campus, I’d rather not have additional “junk” hanging off the switch. So I checked the TP-Link specs and it’s 1310nm SM FDX fiber. So I purchased an appropriate 1310nm 2km SFP and put it in the extreme switch. When I went to swing the cable over from the old feed to the new one that our cabling vendor ran, I got about -11dB signal according to show port 1:51 transceiver command. So physically for 100mb that’s a decent optical level. However the port never transitioned to an active / up state, and the TP-Link device link light did not illuminate, even after power cycling it.

So long story short, can’t the X450-G2 Poe sync up at 100meg FDX if the SFP is designed for it?

I’ll likely get a different media converter (1gbps) and SFP to match instead. FS.com has media converters with SFP sockets on them so you can customize the optics. I’ll likely go with that.

Re: cant the x450-g2 sync up at 100mbps fiber on the sfp port?

BradP — Tue, 02 Jun 2020 09:12:03 GMT

I feel like the question may be obvious, but I don’t see the answer in your blurb up there. Did you ensure that autonegotiation was on, or the port was hardset for 100/Full?

Thanks

Brad

Re: cant the x450-g2 sync up at 100mbps fiber on the sfp port?

Keith9 — Tue, 02 Jun 2020 09:16:19 GMT

I tried setting port 1:51 to 100 full. It kept saying that hard coding the speed was unsupported for the sfp ports (1:49-52, 2:49-52).

The same commands to specify the speed on a copper port don’t seem to take on the SFP port.

I just ordered gig optics and fs.com’s 10/100/1000 copper to sfp media converter.

When I get back to that site I’ll have to see if that’s the problem. I almost think EXOS see’s SFP and only allows that to run at 1 gig, or it see’s SFP+ and only allows that to run 10gig (at least in this switch model).

Re: cant the x450-g2 sync up at 100mbps fiber on the sfp port?

Stefan_K_ — Fri, 05 Jun 2020 02:09:59 GMT

X450-G2 allows 100 Mbit/s SFPs.

Which SFP Module did you get exactly? 100Base-SX or 1000Base-SX?
Do you have Singlemode or multimode cabling? “1310nm 2km SFP” speaks for Multimode cabling, but “1310nm SM FDX” for Singlemode.
Did you try swapping the receive and tranceive fibers with each other at one end?

Re: cant the x450-g2 sync up at 100mbps fiber on the sfp port?

Keith9 — Sat, 06 Jun 2020 04:03:42 GMT

100base-SX

The cabling vendor of the hospital installed armored single mode fiber. Its a requirement of the hospital.

I thought 850nm was MM and 1310 and higher was SM. Anyway we have two locations in this hospital. The X450-G2 has 2 1gbps 1310nm 2km SFP connected to 2 cisco 1310nm 2km SFP in the other location. The link is up.

Didn’t see a need to swap recieve and transmit fibers at my end because I was monitoring the port on the EXOS side and it saw light at -11 db. When unplugged it was inf* (infinate). It def. saw light.

I just received a new media converter and sfp for it as well as another sfp for the exos side, this time 1gbps 10km transmitter.

Just to make sure it wasn’t DOA, I tried it at home (though I have a Ubiquiti Unifi switch) and it linked up fine.

In the next week or two I will visit the site and try with 1 gig optics instead of 100meg optics. I know the 1 gig optics work fine for our other trunk link throughout the hospital campus.