– Copied from customer query –
As the UbiSwitch is managed, does that mean that hooking 2 of them up together to create additional Ethernet ports is just a matter of connecting them together?
There are two ways to connect up two UbiSwitch.
Option 1: 1GBASE-T to 1GBASE-T: This method means taking one of the 1GBASE-T ports on each UbiSwitch, and simply wiring them together. This is simple to do and requires no port configuration. The downside is that it creates a 1Gbps bottleneck between the two switches.
Option 2: 10G port to 10G port. This method means taking one of the 10G ports on each UbiSwitch, and wiring them together. We haven’t actually tried this, so we’ll need to play around with the configuration of the ports to get it working. In theory that’s trivial, but it can be a bit tricky. Most likely both ports would need to be in USXGMII mode, but we’d need to look into this. The benefit of this is that there is no bottleneck between the switches.
Can you accept the bottleneck of 1Gbps between the switches? You’ll still have no issue pinging devices on both switches using the connection between them. However if you had more than 1Gbps that needed to traverse from one switch to the other, it would exceed that connection.
@josh_elijah i know it is almost 2 years later, but is there more news on this? has this been tested and can i find some documentation on this?
many thanks!
Yes you can connect two UbiSwitch together via their 10G ports. No configuration needed, it works out the box in 10GBASE-R mode.
If you’re using UbiSwitch baseboard, then you would use the SFP ports for this, so you can use a short DAC cable like this fs.com/products/21254.html to do this.
If you’re designing your own baseboard and planning to integrate two UbiSwitch modules onto that baseboard, you can connect the two 10G ports together directly (RX to TX and TX to RX).
If you let me know how you are planning to connect your UbiSwitches together, I can advise on the best approach.
Thank you for the quick reply.
We are designing our own baseboard. How it looks now i would just connect Port 0 of Module 1 to Port 10 of Module 2. The distance for these signals is about 65 mm max.
In total we have a need of 14 Ethernet ports where 1 of them is the connection to the control system as the rest is internal.
One of the modules will supply etherenet to 8 thrusters and will link that to the other module over that 10G port. The other module takes care of the rest.
On the Hardware side, for the routing of these 10G signals, i guess it is impedance matching to 100Ohm, is there any need for more hardware? termination resistors or even impedance matching resisitors?
Other things that i need to consider?
This application note provides a lot of useful information regarding impedance requirements
In your case, the RX of Port 0 needs to connect to the TX of Port 10, and vice versa. No termination resistors are needed.
We also offer a design review service for this kind of thing that can save a lot of headaches, I’d highly recommend using that once your design is done. You can email us at info@botblox.com