Meraki MS225-48LP daisy chain

[MattRedis]

If i want to purchase 3 of these, does anyone know which fiber transceivers i need and which fiber optic cable i need to buy to daisy chain these 3 switches?

Thanks

[jdsilva]

How close to each other are they?

If they're within 100m I'd use a copper SFP, not fibre, because they're cheaper. 

If they're 100-220m apart I'd go with multi mode fibre (MA-SFP-1GB-SX)

If they're over 220m apart, up to 10Km, then it's single mode fibre (MA-SFP-1GB-LX10).

Of course, make sure you align this with whatever you actually have for your structured cabling between the switches if they are not in the same location. E.g. if you have single mode fibre between two wiring closets then just get the LX SFP's as the other won't work well over that. 

https://meraki.cisco.com/lib/pdf/meraki_datasheet_sfp.pdf

[MattRedis]

Thanks JD. The switches are stacked on each other so they are like .3 meters from each other. I thought fiber Gave me faster speeds but I guess not.  I'm getting the MA-SFP-1GB-SX SFP. I can probably get the copper ones for cheaper but I want to use fiber as that's how all my other switches are Daisy chained. I just need to know what fiber optic cable I need to purchase to be compatible with my SFPs

Thanks

[PhilipDAth]

>The switches are stacked on each other so they are like .3 meters from each other.

Don't daisy chain the switches.  Use physical stacking in this case.

[PhilipDAth]

Are they by chance in the same rack?  If so I'd use stacking cables; a couple of 500mm cables and a 1m cable to go from the bottom to the top.

https://documentation.meraki.com/MS/Stacking/Switch_Stacks#Configuring_a_Physical_Switch_Stack 

2 x MA-CBL-40G-50CM

1 x MA-CBL-40G-1M

[BrechtSchamp]

I think it's important to understand that @jdsilva is talking about simply linking the switches in a daisy chain and @PhilipDAth is talking about a physical stack.

[MattRedis]

What are the differences between a physical stack and a daisy chain?

[PhilipDAth]

>What are the differences between a physical stack and a daisy chain?

The stacking cables are 40Gb/s each.  They allow the group of switches to act like a single switch.  You can form LACP channels across the members in a stack.  They form a single loop free spanning tree instance in the stack (you want to avoid L2 loops where possible).  The converge faster after a single switch failure.

The stack cables will also be much cheaper than using fibre.

[BrechtSchamp]

Have a look at the link Philip posted:

https://documentation.meraki.com/MS/Stacking/Switch_Stacks

[PhilipDAth]

Also check out this guide listing compatible SFP[+], the different grades of fibre and the range for each.

https://meraki.cisco.com/lib/pdf/meraki_datasheet_sfp.pdf 

[cmr]

Also please note that the SFP+ ports support 10Gb and the transceivers quoted in other posts are 1Gb.  They will work but not sure that's what you need.

[MattRedis]

Thanks guys. It looks like i can daisy chain them virtually with the same network in my US office so I will just do it that way. Thanks everyone.