Aruba InstantON 1930 (HPE-JL680A) problem with SFP - Page 1
Forum section: electronics / general

author: gigabyte091
author_rank: Contributor
timestamp: October 26, 2021, 06:03:00 am
content: Hello guys,I'm having a problem with fiber optic connection to the mentioned switch. I have the following configuration:TP-Link MC220L Gigabit SFP Media converterSFP Module inside media converter is TL-SM311LS 1000Base-LXSFP Module inside switch is MaxLink ML-S31D-3-HPProblem is that switch does not see the link, when i connect fiber optic to switch, led blinks for a second and that's it, link is down.Switch FW version is 1.0.5.0(139)

author: Ranayna
author_rank: Super Contributor
timestamp: October 26, 2021, 09:34:13 am
content: That MaxLink is a 1.25 GBit/s SFP. That may be the reason why it does not establish a link to the 1000Base-T.Additionally, check the log of the switch if the SFP maybe rejected because of a vendor check.

author: gigabyte091
author_rank: Contributor
timestamp: October 26, 2021, 01:55:30 pm
content: According to the distributor, that SFP module should be compatible with aruba switch. We were waiting 2 days for them to check compatibility.According to switch logs, switch detects that SFP module is inserted, and thats it. No error message or anything else

author: Ranayna
author_rank: Super Contributor
timestamp: October 26, 2021, 02:25:43 pm
content: Ok, i have looked a bit into the two transceivers, both support 1000Base-LX, both use the same wavelength, so they should be able to establish a link.Have you tried switching the fibre pair on one end?Also, how long, and what fibre type is the cable you are using?

author: gigabyte091
author_rank: Contributor
timestamp: October 26, 2021, 05:04:40 pm
content: So this is specification for the cable they provided us with the media converter.Cable sheathing made of halogen-free, low smoke and flame-retardant material- Assembled with high-quality connectors with ceramic ferrule- Core structure: Duplex cable I-VH- High tensile strength due to Kevlar with aramid fibres- Colour: yellow- Length: 2.0 m- Quantity of fibre: 2- Cable type: Duplex Cable- External cable: No- Fibre section: 9/125µm OS2- Connection ports: LC / LC- Side 1 Connector Type: LC- Side 2 Connector Type: LC- Kevlar strain relief: Yes- Crossed: Yes- Cable LSOH: Yes

author: Ranayna
author_rank: Super Contributor
timestamp: October 26, 2021, 05:46:22 pm
content: Ok, the fibretype matches.But using just 2 metres for SFPs that have enough power for 10 kilometres of cable might just be too short. You might be overloading the receivers.If you actually only need such a short length, you should consider multimode tranceivers and cables. Most of the time these are also cheaper.

author: gigabyte091
author_rank: Contributor
timestamp: October 26, 2021, 06:17:40 pm
content: I tried to connect 2 media converters, just to be sure cable is not faulty, and it is working without any problem. I could try multimode cable and transcievers but i don't have any right now.

author: gigabyte091
author_rank: Contributor
timestamp: October 27, 2021, 09:07:38 am
content: Update:I tried same setup on my old Procurve Switch 2626-J4900C and link is working...Update 2: Link is working with two MaxLink SPF between Old procurve switch and new aruba switch

author: gigabyte091
author_rank: Contributor
timestamp: November 12, 2021, 05:41:56 pm
content: So, the problem was in media converter, tp link is replaced with mikrotik and now its working

author: mansaxel
author_rank: Super Contributor
timestamp: November 19, 2021, 08:53:32 am
content: Quote from: gigabyte091 on November 12, 2021, 05:41:56 pmInteresting. The TP-link ones are pretty bullet-proof in our experience.