Good day every one!!!
I am trying to connect to my router to ISP for the first time, i cannot get internet connection.
I am checking everything, can you guys please tell me if this the problem
[mikrotik@iron] > interface ethernet cable-test sfp1
name: sfp1
status: no-link
Does this means its a cable fault? or can it be wrong SFP module?
Thank you!!
Does this means its a cable fault? or can it be wrong SFP module?
It can be either…
What is the Mikrotik model ?
SFP module model ?
Did you check the compatibility list first ?
It can also be something as simple as having the fiber positions reversed in the SFP module.
HI,
thank you very much for the informations guys!
What is the Mikrotik model —CCR1072-1G-8S+
SFP module model ----https://www.fs.com/de-en/products/11802.html (my ISP suggested)
Did you check the compatibility list first – FS company assured me it is comptable. does only mikrotik suggested modules work?
But i am using BiDi Transceiver SFP module. so can we eliminate this issue ?
Am not really sure if a fiber can be positioned reversed inside the module…
This is one fiber module, there is nothing to reverse, unlike in modules with separate tx and rx fibers.
What does ‘/interface ethernet monitor sfp1’ show? If your SFP is recognized at all, it should print a lot of info about it.
Here is the details of the command you mentioned.. module got recognized.. i tried with two different cables, still no success
https://www.fs.com/de-en/products/40384.html
https://www.mikrotik-shop.de/Netzwerk/LWL-Verkabelung/LWL-Patchkabel-SM-1m-LC-LC::1539.html
[admin@Iron] > /interface ethernet monitor sfp1
;;; Connection from the Modem
name: sfp1-WAN
status: no-link
auto-negotiation: done
advertising:
link-partner-advertising:
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: LC
sfp-link-length-9um: 10000m
sfp-vendor-name: FS
sfp-vendor-part-number: SFP-GE-BX
sfp-vendor-revision: A0
sfp-vendor-serial: G1910091515
sfp-manufacturing-date: 19-11-01
sfp-manufacturing-date: 19-11-01
sfp-manufacturing-date: 19-11-01
sfp-wavelength: 1310nm
sfp-temperature: 33C
sfp-supply-voltage: 3.275V
sfp-tx-bias-current: 16mA
sfp-tx-power: -5.865dBm
sfp-rx-power: -12.452dBm
eeprom-checksum: good
eeprom: 0000: 03 04 07 00 00 00 00 22 00 01 00 01 0d 00 0a >
0010: 00 00 00 00 46 53 20 20 20 20 20 20 20 20 20 >
0020: 20 20 20 20 00 00 00 00 53 46 50 2d 47 45 2d >
0030: 58 20 20 20 20 20 20 20 41 30 20 20 05 1e 00 >
0040: 00 1a 00 00 47 31 39 31 30 30 39 31 35 31 35 >
0050: 20 20 20 20 31 39 31 31 30 31 20 20 68 f0 01 >
Looks a bit weird. You have signal from the other end, it seems (rx-loss no & rx power -12) but no link. What does your ISP say?
Are wavelengths correct? Your module transmits at 1310nm and receives at 1490nm … More usual wavelength combo is 1310/1550nm.
And then modules on both ends of single-fibre connection have to be pair (not identical). Pair of your module is this one (transmitting at 1490nm and receiving at 1310nm).
Actually 1000BASE-BX10 uses 1310/1490nm officially. But receivers are pretty wideband; I would expect 1490 & 1550nm to interoperate. My ISP does as well, they spec the optics needed if you want to use your own hardware as ‘TX 1310nm, RX 1490/1550nm’. I use a TP-Link TL-321B which expects 1550nm RX and works fine with them (I don’t know what they use at their end). But he does have RX signal at -12.452 dBm, which seems reasonable; I am at -11.1, and nominal receiver range is between -3 and -19.5 dBm for the Cisco GLC-BX-U for instance.
But it’s worth asking his ISP about what they recommend.
Our ISp suggested the SFP module which i currently use, he says that my router is not requesting their DHCP sever for an IP address. They are confused and told me they cannot help.
I want to figure out where is the fault.. you guys have been amazing in helping me find the solution. Thank you
That your router isn’t requesting a DHCP address is to be expected, as your physical link isn’t even up. So yeah, they are confused. Normally I would say ‘Looks like your TX fiber strand is kaput’, but as this is a single strand, and you see their TX light at your end, the fiber is OK. I’d call them and ask what they are seeing on their end of the physical ink. That may take some beating on helpdesk drones to get to a second or even third-line engineer who actually knows what’s what.
Brainwave: are they 100% sure the interface you’re connected to is admin up? Not all boxes switch off the TX laser on ports that are administratively shut down, which would explain what you’re seeing…
Now i replaced ccr1072 router with Fritzbox router, with fritzbox i could connect to the internet. below is the details provided by ISP.
131574111 - 22.01.2020 14:59:05 - 10.212.14.60 - 000005 - 013 - E0996D2E947 - DHCPACK 187.3x.2x6.23x
131574111 - 22.01.2020 14:59:05 - 10.212.14.60 - 000005 - 013 - E0996D2E947 - DHCPREQUEST
The ISP guy gonna ask his colleagues and let me know (at least this time) the correct wavelength, and i can select the proper SFP module.
Thank you all for helping me!!
The Fritzbox is a 5490? Weird, that does TX 1310nm, RX 1480-1580nm (again supporting my idea that 1490 & 1550nm should be interoperable): https://en.avm.de/products/fritzbox/fritzbox-5490/technical-specifications/ You’d think your SFP ought to work too. But perhaps you should get this one instead? My ISP also uses the 5490 as a CPE, and my TP-Link TL-321B SFP (which is 1310/1550) works in my CCR1036-8G-2S+ as replacement.
oh man oh man you are absolutely right about he module.
Yes its fritzbox 5490 and it has TX 1310 nm, RX 1480 bis 1580 nm, so the module you suggested is the right one.
The ISP guy still don’t wanna accept that the module(current one) he suggested was wrong, now i will order [url=https://www.fs.com/de-en/products/39135.html] this.
With all the information you have given, i am pretty sure the suggested module gonna work.
Thank a ton maaannn!!
I will update the results to you guys, as soon as i get the new module working. you guys been so helpful for every one!!!
Well, both 1490 and 1550nm are within the receive bandwidth of the 5490, so I can’t really blame the guy for expecting your module to work; I’d have expected the same thing. I can confirm that 1310/1550nm optics (a TP-Link TL-SM321B, in my case) work as a replacement for a FRITZ!Box 5490. The FS SFP you have claims a RX window between 1440-1540nm, which actually overlaps only slightly with the TX window of the 1550nm TX/1310nm RX part, which is 1530-1570nm.
From this we can conclude two things: 1) 1490 & 1550 RX modules are actually pretty unlikely to interoperate with 1550 & 1490nm TX downlink modules respectively, unless you have an RX bandwidth window that’s exactly right at the 1310nm TX uplink part. Which (surprise!) the 5490 does. Smacks of purpose-built optics 
2) Your ISP uses 1550nm TX/1310nm RX optics at their end, like this (or equivalent).
Hi mbovenka
So My ISP confirmed that the module should have TX 1310 nm, RX 1490 nm and RX 1550 nm is for TV Signal.
But i also tested with this module (https://www.fs.com/de-en/products/39135.html) which has RX 1550 and still i have “no-link”..
i am using this(https://www.mikrotik-shop.de/Netzwerk/LWL-Verkabelung/LWL-Patchkabel-SM-1m-LC-LC::1539.html) cable to connect the SFP module.
Well, as far as 1490 vs 1550nm is concerned, that’s simply dependent on whatever the other end is using. But one of them should have worked, and I would have expected the 1550nm SFP to. Like I said earlier, my ISP uses the Fritzbox 5490 as a CPE as well, and a 1310/1550nm SFP works for me in my CCR (and before that in a Ubiquity EdgeRouter X-SFP). The patchcord you’re using is OK, although you’re using only a single strand of it of course.
Time to get on the horn again with your ISP, I think, and figure out what they are seeing on their end. Your end looks OK to me.