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Unexpectedly slow download speed ...

J

Julian Hicks

New Member
I've recently installed Raydon's firmware on my Foxsat HDR and have started using the simple FTP server connected to Filezilla on my Win 10 PC for offloads. The cable route beteeen them is as follows:

HDR NIC - CAT6 - GIgabit Router 1 - CAT6 - Gigabit Router 2 - Cat 6 - PC Gigabit NIC

I'm getting a maximum speed of offload of about 2.5 MiB/sec into my PC when downloading large .TS files! The HDR NIC can't be only 10Mb as that couldn't supply 2.5MiB/sec.
So why would a 100Mb NIC be limited to 2.5MiB/sec, which is only 25Mb/sec?

Regards - Julian
 
The CPU in a Foxsat is very weak and probably can't push data fast enough.
It certainly doesn't reach 100 on a Fox T2 which is more (but still not very) powerful.
These things were only specified for management, not large processing tasks.
 
Julian,
2.5Mbit/s seems slow (to me). When I use FTP to move a recording from foxsat to PC, filezilla typically reports ~ 7MB/s which is around 50Mbit/s.
Topology.
HDR <-> 10/100 layer 2 switch <-> 10/100/1000 L2 switch <-> 10/100/1000 L2 switch <-> 10/100/1000 L2 switch <-> PC

Are your routers operating at layer 3 ?
Put the PC and HDR in the same subnet and simplify the topology to just a 10/100/1000 switch and test.
 
Apologies for a very late response to this thread; I hadn't checked back after my original query to see that some responses had been posted. So, thanks for your quick replies Guys.

Sorry @Dino , I'm not sure what 'Layer' I'm 'operating at' but they are just two 'normal ISP supplied routers, the first connected to my FTTP Ethernet interface and the second's WAN port 'plugged in the back' of the first.

I've just rechecked my Filezilla download figures, without changing the config, and they are still showing a Humax to PC rate of 2.4MiBytes/sec [i.e about 19.2 actual Mibits/sec]

Note: I never said in original post that I was getting 2.5Mbits/sec, it was reported as 2.5 MBytes/sec

However, I will try in the next few days to connect a PC to the same Router to which the Foxsat is connected so as to see if a 'slowdown' is caused by the 'through two switches scenario'.

Regards - Julian
 
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Your description suggests there may be two IP networks.

What is the IP address and subnet mask of the HDR and the PC in the 'slow' set up ?
If the devices are on different IP networks, the path involves routing (a Layer 3 operation)
If the devices are on the same IP network, the path will be switched (a Layer 2 operation)

On domestic kit, routing will typically be slower than switching.
 
Ah; indeed there are two networks involved! The HDR is on one network [10...* / 255.255.255.0] and the Windows PC on a network connected off a NAT router [192.168.. / 255.255.255.0]

Thus all the FTP traffic is being routed i.e. Layer 3. Accordingly, I will try out a direct connection avoiding the NAT router by connecting the PC to the 10...* router with a CAT6 cable and check what FTP transfer rates I get.

Thanks for you help in understanding why the traffic was slower than I expected ...

Regards - Julian
 
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