Re: Hi-Rise Building Fiber Suggestions

["Kaiser, Erich" <erich () gotfusion net>]

I would use single fiber CWDM muxing and OADM, then you can get it down to
7-8 switches per fiber.  CWDM single fiber has a max of 9 channels and the
optics are typically less expensive.


Erich Kaiser
The Fusion Network
erich () gotfusion net


On Wed, Feb 26, 2020 at 7:43 AM Mike Hammett <nanog () ics-il net> wrote:

> DWDM can be done fairly cheap. Some combination of MUXes and OADM modules
> along the way. One possible solution is:
>
> First floor: https://www.fs.com/products/35887.html
> Every floor between: https://www.fs.com/products/70427.html
> Top floor: https://www.fs.com/products/35887.html
>
> Every floor gets 10G to aggregation switches on the top floor and bottom
> floor. The aggregation switches directly connect via the second pair.
>
>
>
> -----
> Mike Hammett
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> ------------------------------
> *From: *"Ryan Hamel" <ryan () rkhtech org>
> *To: *"Bradley Burch" <bradley () wifastnetworks com>
> *Cc: *nanog () nanog org
> *Sent: *Tuesday, February 25, 2020 10:45:05 PM
> *Subject: *Re: Hi-Rise Building Fiber Suggestions
>
> How would that work to solve Norman's problem? That sounds like a lot of
> money spending, and setup time, for nothing.
>
> Ryan
>
> On Feb 25 2020, at 8:21 pm, Bradley Burch <bradley () wifastnetworks com>
> wrote:
>
>
> Should consider DWDM or GPON and in those look at passive optical
> technologies that can benefit the project.
>
> On Feb 25, 2020, at 9:33 PM, Norman Jester <nj () jester mx> wrote:
>
> I’m in the process of choosing hardware
> for a 30 story building. If anyone has experience with this I’d appreciate
> any tips.
>
> There are two fiber pairs running up the building riser. I need to put a
> POE switch on each floor using this fiber.
>
> The idea is to cut the fiber at each floor and insert a switch and daisy
> chain the switches together using one pair, and using the other pair as the
> failover side of the ring going back to the source so if one device fails
> it doesn’t take the whole string down.
>
> The problem here is how many switches can be strung together and I would
> not try more than 3 to 5. This is not something I typically do (stacking
> switches). I have fears of STP and/or RSTP issue stacking past Ethernet
> switch to switch limits (if they still exist??)
>
> Is there a device with a similar protocol as the old 3com (now HP IDF)
> stacking capability via fiber?
>
> I’d like to use something inexpensive as its to power ubiquiti wifi on
> each floor. Ideally if you know something I don’t about ubiquiti switches
> that can do this I’d appreciate knowing.
>
> Norman