If you are limited on fiber runs, how about using 10Gb BiDi optics to
limit a ring to say two sets of 15 switches.

Tim

On 2/25/20 8:21 PM, Bradley Burch 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 <n...@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
>>

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