they write that with 1518 byte frame (Ethernet test results), Bridging none (fast path) 983.7 Mbps!!!
983.7 Mbps less than 1Gb/s? Isn’t that a bit slow for a gigabit switch?
ok. Let’s see if I understand.
All routing operations go to 1G, but those switching are about 49000Mbps.
CRS125-24G is a switch but also a small router.
RB3011UiAS is a router that also has switch functions.
am I right?
Perhaps a comparison is wrong but which one advise me for an office lan.
No, because the numbers you mention are not for the switch functionality of this routerboard.
Switching is done at wirespeed.
When not doing switching, all packets go through the CPU, which in this case it’s a small MIPS-BE @ 600MHz.
973Mbps is quite an accomplishment for this CPU (albeit this is a best case scenario with no rules or anything really useful configured).
Keep in mind that most likely this number is also limited by the 1gbit lane from the switch chip to the CPU as shown in the block diagram. https://i.mt.lv/routerboard/files/CRS125-24G-1S-160620160514.png
Even with a much faster cpu, it would still be limited to 1gbps.
In reality though you will probably achieve lower numbers depending on your real-world configuration and how exactly you wire everything (you need to know the block diagram of the router to understand how to best connect everything to get the maximum possible out of the device)
On an RB2011 (same CPU) with fasttrack and NAT I get around 400-500mbps of routed (not switched) traffic, at most, before the cpu maxes out, but I have a rather complex configuration. I am quite glad with the performance (without fasttrack I could barely get over 100mbps).
BUT, wirespeed, is wirespeed. For switching between the 24 ports you will get 1gbps wirespeed regardless of what the CPU does.
All the above apply to routed or bridged traffic (which always goes through the cpu)
RB3011 is a router not a switch. It does have 2 switch chips for the 10 ethernet ports of this routerboard.
5 ports for each switch chip. You can use them in switch mode to achieve wirespeed between ports on the same switch group.
But between switch groups you need to bridge the 2 switches (the master ports) which means that traffic from one switch group to the other will go over the CPU.
RB3011 can achieve way bigger throughput because it has a dual core 1.4GHz ARM CPU. So it’s really a completely different beast.
Also both switch groups have 2gbit lanes to the CPU (1gbit per cpu core) as shown in the block diagram https://i.mt.lv/routerboard/files/RB3011UiAS-160307123613.png
Not exactly. RB3011 does have a switch menu which gives you some options to configure the switch groups, but this switch menu is very poor compared to the switch menu on the CRS series which gives more options akin to a proper managed switch.
As td32 already mentioned, you need to specify what exactly you want to setup.
An ‘office lan’ can consist of a hundred PCs with 100mbps gateway to the internet or it can be a single pc with 4mbps gateway to the internet.
Obviously these two ‘office lan’ networks have completely different needs in terms of hardware.
First thank you! With small steps I begin to understand.
The LAN that I should arrange includes an office / laboratory with 5 gigabit PCs
for generic use and a NAS (hoping at 90 / 100Mbps network speed) a modem and a Raspberry Pi as web servers.
other devices like an ipcam, 2 printers.
All I’ve listed for now is wired, 5 pc + NAS Gigabit network and the other 100Mb.
Then there are 2 wifi groups the first for mobile devices, laptops, smartphones etc ..
for this wifi i would use RB951Ui-2nD.
RB951Ui-2nD has the PoE-out perfect to power a RBmAPL-2nD placed inside the private home near the office.
The private part has 3 VLAN-wifi: guests, owner’s PC and one for smarttv (netflix etc.) + skyTv.
The important thing is to have the maximum speed betwen 5-pc and the NAS.
