HO do i set up a ring topology with Ubiquiti switches (Ubiquiti UniFi Switch US-48-750W)

jbovalley1
jbovalley1 used Ask the Experts™
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Need to set up a ring topology using ubiquiti switches. The area to be covered requires about 400ft between each switch. How do i configur the switched to do this ?
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What do you mean by a ring topology of switches ?

To get 400Ft between switches, you should be using Fibre as the max run length on Copper is 328 ft https://en.wikipedia.org/wiki/Category_6_cable
TimotiStDatacenter Technician
Top Expert 2012

Commented:
Cabling considerations aside, if you want to set up something like this
[sw1]------[sw2]----[router/fw]
  |          |
  |          |
  |          |
[sw3]------[sw4]

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you can cable up the switches using the SFP ports for fiber or let's say port 47-48 for copper (if within 100m).
Spanning tree will disable one link to temporarily break the loop, if anyone disconnects/cuts a cable spanning tree will re-enable it and the show goes on.
I'd set it up for RSTP protocol, make the switch closest to the router/firewall the root of the spanning tree (set priority to 0).

Some switches provide cool ethernet ring protection protocols instead of spanning tree, but those are typically for carrier metro-ethernet deployments.

Author

Commented:
I want to use Fiber between the switches as the distance does not permit copper...
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TimotiStDatacenter Technician
Top Expert 2012

Commented:
In that case do use the SFP modules on the switch.
I'd go with multimode fiber and 1000Base-SX optics, the official Ubiquiti one is UF-MM-1G, but according to their docs they do work with pretty much anything you have on hand:
UniFi - USW: Which SFP Modules Can be Used

Author

Commented:
great!.....Also wanted to know that is this is possible ..... on the main / master switch that would be part of the ring in which 2 of the SFP ports will be occupied a part of the ring topology ..... can i also add  an additional switch to each of he 2 other SFP ports ?  If so would the master switch see all the switches as one network  ?
Datacenter Technician
Top Expert 2012
Commented:
All SFP ports function identical on that UniFi switch, so it doesn't matter which ones you use.
Sure, you can link to any additional switch from any free SFP port.

Basically, you can cable them up in any topology you like, as long as you have Spanning Tree Protocol enabled on them, they will disable unnecessary links and automatically settle in a logical topology that just works.

Example (because we all love ASCII-art):
[sw1]------[sw2]----[router/fw]
  |          | \
  |          |  \
  |          |   \
[sw3]------[sw4]  [sw5]
  |
  |
[sw6]

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