This is the record of the testing done on the AP using the LANforge.
Inside the anechoic chamber, the LANforge (eth1) is connected to the AP under test via a LAN cable.
I set up 4 virtual stations in the LANforge, with the same SSID as the AP. This results in a loop that allows the LANforge to measure the throughputs of the various streams. The stations are named:
STA-1-BK (background)
STA-2-BE (best effort)
STA-3-VI (video)
STA-4-VO (voice)
I configure 1 uplink stream per station. Each stream is set as 10 Mbps UDP. Notice that the streams are in an increasing order of priority.
Tests are conducted when WMM is disabled, and the same tests are conducted when WMM is enabled.
The test procedure is as follows:
STA-1 starts transmitting.
Then STA-i starts transmitting at time (i-1)*30 s.
I found that the video and voice streams are not able to achieve the desired 10 Mbps, when WMM is disabled.
Next, WMM is enabled.
When WMM is enabled, the QoS priority of the data streams are taken into account. When the video or voice streams are turned on, they maintain the constant desired throughput, while the background and best effort streams are starved of throughput.
Also, when WMM is enabled, only the background and best effort streams shows large latency. The video and voice streams have very little latency.
Therefore, it can be seen that the WMM feature is working in AP under test.
Reference:
Wi-Fi Multimedia (WMM)
www.uniroma2.it/didattica/TPI2/deposito/wmm.pdf
The Cisco SG300-10 says its forwarding rate is 14.88Mpps with 64 byte packets. I estimated this to be ~ 7 Gb/s.
Does this mean that up to 7 computers can transfer data across VLANs at full 1 Gb/s wirespeed (assuming 64 byte) packets?
Why would you ever send line-rate 64 byte packets in any scenario other than a switch drag-race? That said, cisco's data sheet numbers indicate it can do unidirectional 64-byte line rate for at least seven computers.
I'm assuming you understand that ethernet's IFG and SFD mean that you get nowhere near 1Gbps of real data @ 64 bytes.
If you're using FTP, HTTP, CIFS/SMB, H.264 or any other protocol used for data transfer, then yes 7 computers can do bi-directional line-rate based on Cisco's quoted 14.88Mpps and 20Gbps of "bandwidth" in the data sheet
How will this vary with packet size? What kind of actual throughput can I expect when multiple computers are transferring files using SMB across VLANs?
Under normal circumstances the SMB protocol is not limited by the network. It's limited by how fast you can unspool data from your server's disk.
does it do wirespeed intervlan routing?
Yes up to 14.88 Mpps
Best Answer
Since you're not mentioning any model or software version, I'm just guessing it's AlliedWare Plus. A quick google search gives me http://alliedtelesis.com/manuals/9000V218CLIRevA/ak1027137.html#Rak46367, on which
show platform table port [port] countersis mentioned as a way to show interface counters.