2.5Gb Switch > when do I need 2-port 10Gb SFP+

[cmonty14]

Hi,
checking the list of available 2.5Gb (managed) switches, there are some devices with 2-port 10Gb SFP+ and other devices with (only) 1-port 10Gb SFP+.

Could you share some typical use-case(s) when it makes sense to have 2-port 10Gb SFP+?

THX

 

[i386]

- when you have multiple switches
- when you have multiple hosts with 10GBE SFP+ (or better)
- a mix of the other two points

 

[cmonty14]

Is this statement correct:
Using a 8-port 2.5Gb switch, 2-port 10Gb SFP+ is highly recommended.
Otherwise I cannot use all 8 ports with max. speed in parallel.

 

[bugacha]

Is this statement correct:
Using a 8-port 2.5Gb switch, 2-port 10Gb SFP+ is highly recommended.
Otherwise I cannot use all 8 ports with max. speed in parallel.

No

without knowing context, who talks to who and so on, this statement is totally irrelevant

 

[blunden]

For instance, you could have 1 port as a 10 Gbps uplink and use the other port for a NAS or a computer/server where you want 10 Gbps speed.

 

[cmonty14]

Actually this switch will be connected to fiber router, and ideally all 2.5Gb ports have optimal uplink speed to internet.

 

[louie1961]

Look at the max throughput of the switch, it should be listed as a specification. That will tell you if at least in theory all ports will be capable of maximum throughput/speed. You can also check out some of the real world tests Patrick and team have done to see if a switch lives up to its rating. I *think* the biggest issue with multigig ports will be found on devices like the N100 firewall mini-pcs that have two 10gbe SFP+ ports. They just do not have enough PCIe lanes to support full throughput. But I think most of the switch reviews I have seen here, especially for the cheaper realtek based switches don't do too badly. There is some overhead loss and you won't get full 2.5 or 10 gbe speeds, but they are not bad

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www.servethehome.com

 

[nabsltd]

Could you share some typical use-case(s) when it makes sense to have 2-port 10Gb SFP+?

In one case, I connect one SFP+ port in a home run back to my rack, and use the other to jump to another switch to reduce cable run length.

In my case, the sum total usage of the two switches is unlikely to ever hit 10Gbps, but I can easily support 5 clients running close to full 2.5Gbps.