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Spudrageous
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GPEN21 Eth2 to SFP Communication not working

Sat Aug 08, 2020 5:52 am

Just received my first test set of GPEN21! So excited, then so disappointed. I'm trying to terminate ActiveE FTTH into apartments and power access points with PoE using the same device. GPEN21 fits the usage case precisely. However, during testing, we are finding that no communication is possible between the internal PoE-out ethernet port and the SFP port. I suspect this caused by software ie "port isolation." Is this a feature or a bug?
 
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krafg
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Re: GPEN21 Eth2 to SFP Communication not working

Sat Aug 08, 2020 10:26 pm

I suppose that you are trying to connect GPEN21(1) -> ETH2 to GPEN21(2) -> SFP (S-RJ01).

Right?

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Spudrageous
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Re: GPEN21 Eth2 to SFP Communication not working

Wed Aug 26, 2020 12:33 am

Yes. I confirmed with a support case that it ins't the intended design and isn't a support operation. They may add support in SWos in a future release.
 
the2masters
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Re: GPEN21 Eth2 to SFP Communication not working

Tue Sep 15, 2020 6:40 pm

That's too bad, this is my primary use case. Already bought two GPEN21, tried to configure them, failed, and then found this forum post. Haven't found anything about this limitation in user manual, quick start guide or your website. Please document this limitation on your website and try to fix it in the next swOS release!
For now I switched to the RB260GSP to connect a LHG to Fiber.
 
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leeq
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Re: GPEN21 Eth2 to SFP Communication not working

Fri Nov 20, 2020 11:04 pm

We just deployed 20 of these today in exactly the same setup, only to find it does not work :( .. Going to have to work out a hash with a power lead and splitter now. :(
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blingblouw
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Re: GPEN21 Eth2 to SFP Communication not working

Sat Nov 21, 2020 9:12 am

I don't get why it's like this. If it's a combo port then it should be marked as such. It looks great as a fibre to ethernet with poe
 
owsugde
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Re: GPEN21 Eth2 to SFP Communication not working

Wed Dec 02, 2020 7:30 pm

Ran head-on into the same trap today. Expected the GPEN21 to be basically a three-port switch, with one copper PoE in, one copper PoE out, and one SFP. Found out that ETH2 to SFP isn't switched at all, maybe even an undocumented combo port. Cool. The AP behind the ETH PoE is now isolated from network. All this makes it much less usable as a "smart injector".

Just finding out now that in the brochure it says "GPEN21 has an Ethernet and an SFP port for fiber connectivity. These ports can be used for simultaneous external connections, but not for cross-port
communication."

Now I'm kinda asking myself: Why?
 
chubbs596
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Re: GPEN21 Eth2 to SFP Communication not working

Wed Feb 03, 2021 5:01 pm

Ran head-on into the same trap today. Expected the GPEN21 to be basically a three-port switch, with one copper PoE in, one copper PoE out, and one SFP. Found out that ETH2 to SFP isn't switched at all, maybe even an undocumented combo port. Cool. The AP behind the ETH PoE is now isolated from network. All this makes it much less usable as a "smart injector".

Just finding out now that in the brochure it says "GPEN21 has an Ethernet and an SFP port for fiber connectivity. These ports can be used for simultaneous external connections, but not for cross-port
communication."

Now I'm kinda asking myself: Why?
I also dont get it, it would have been nice
 
mada3k
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Re: GPEN21 Eth2 to SFP Communication not working

Thu Feb 04, 2021 10:12 pm

A block-diagram would be helpful to avoid this confusion
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Spudrageous
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Re: GPEN21 Eth2 to SFP Communication not working

Sat Feb 13, 2021 3:57 am

We ended up still using 360 of these to run a large FTTH deployment. Instead of using a cap AC poe-powered, we ended up using an external router and a barrel power cord splitter. Still looking to get this working. Since you can simultaneously communicate between the external RJ and both the SFP and internal RJ, it looks purely to be software related. This product availability comes on the heals of us using (190) RBFTC11 for FTTH. One heck of a build, but everyone has 1Gbps connection, and now shared splitters or ports to worry about.

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