Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-14 Thread Paul Smith 
On Fri, Nov 13, 2015 at 11:31 PM, Rick Stevens  wrote:
>
>> Thanks, Rick. The idea of using a USB3 gigabit dongle is great --
>> better than replacing the network card!
>
> One bit of advice...buy a good one. Don't get one of those el-cheapo
> units. I use a "j5create" unit typically used with Macs (silver metallic
> cover).

Thanks again, Rick, for your advice!

Paul
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Rick Stevens 

On 11/13/2015 06:27 AM, Doug H. wrote:

On Fri, 2015-11-13 at 13:25 +, Paul Smith wrote:

Dear All,

Is there something in Fedora that I might use to determine the
maximum
speed the network card of my computer can attain on Internet? I am
thinking about wired Internet and not about wireless Internet.

Thanks in advance,


You might need to explain the reason for your request since, it may
change the answer.

As an example, my computer has a GigE port that runs to a 100Mbit
simple switch before getting to anything else.  So I would be limited
to a theoretical maximum of 100Mbit but I might want to know how fast I
can transfer files to/from another computer in my LAN.  The bottleneck
here could be the switch, my NIC, the other computers NIC, OS limits,
firewall slowdowns etc.

So, for me I would really want to test an actual file transfer using a
number of setups.  Depending on each computer I could try Samba, FTP,
SCP.  I might run a wire to bypass the switch.  I might try with
firewalls and antivirus disabled.

All this will also give me some clue on how fast I could run if I was
able to get a fiber connection, to let me know if my system would be a
serious limit to getting the full 1G of true fiber.  Obviously the
switch would have to be upgraded in my case.


Generally speaking, any given NIC that has proper firmware and is in
a relatively modern computer will run very close to the rated wire
speed--provided the other end of the cable can handle it as well. Note
that the effective transfer rate will usually be about 80-95% of that
(for a 1Gbps NIC, 800-950Mbps).

This does not include any overhead involved in the protocol used. You
will find that things like FTP, rsync and the like will show lower
data transmission rates (e.g. multiplying the number of bytes
transferred by 8 to get number of bits transferred) due to their
overhead and that they're dealing with TCP's inherent nagle algorithm
and handshaking. TCP is designed to make sure things get to where
they're supposed to go, and with that comes a lot of overhead. Things
like UDR (rsync-over-UDP) will show much closer to the theoretical data
transmission rate due to its use of UDP.

The most common bottleneck to raw speed is the wire, switch, router,
gateway or ISP that the NIC is connected to. You'll rarely find the NIC
itself the limiting factor.
--
- Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
- AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Rick Stevens 

On 11/13/2015 01:44 PM, Paul Smith wrote:

On Fri, Nov 13, 2015 at 6:06 PM, Rick Stevens  wrote:


Is there something in Fedora that I might use to determine the
maximum
speed the network card of my computer can attain on Internet? I am
thinking about wired Internet and not about wireless Internet.

Thanks in advance,



You might need to explain the reason for your request since, it may
change the answer.

As an example, my computer has a GigE port that runs to a 100Mbit
simple switch before getting to anything else.  So I would be limited
to a theoretical maximum of 100Mbit but I might want to know how fast I
can transfer files to/from another computer in my LAN.  The bottleneck
here could be the switch, my NIC, the other computers NIC, OS limits,
firewall slowdowns etc.

So, for me I would really want to test an actual file transfer using a
number of setups.  Depending on each computer I could try Samba, FTP,
SCP.  I might run a wire to bypass the switch.  I might try with
firewalls and antivirus disabled.

All this will also give me some clue on how fast I could run if I was
able to get a fiber connection, to let me know if my system would be a
serious limit to getting the full 1G of true fiber.  Obviously the
switch would have to be upgraded in my case.



Generally speaking, any given NIC that has proper firmware and is in
a relatively modern computer will run very close to the rated wire
speed--provided the other end of the cable can handle it as well. Note
that the effective transfer rate will usually be about 80-95% of that
(for a 1Gbps NIC, 800-950Mbps).

This does not include any overhead involved in the protocol used. You
will find that things like FTP, rsync and the like will show lower
data transmission rates (e.g. multiplying the number of bytes
transferred by 8 to get number of bits transferred) due to their
overhead and that they're dealing with TCP's inherent nagle algorithm
and handshaking. TCP is designed to make sure things get to where
they're supposed to go, and with that comes a lot of overhead. Things
like UDR (rsync-over-UDP) will show much closer to the theoretical data
transmission rate due to its use of UDP.

The most common bottleneck to raw speed is the wire, switch, router,
gateway or ISP that the NIC is connected to. You'll rarely find the NIC
itself the limiting factor.


Thanks to all respondents! I could now determine that my network card
is a 100Mbps Fast Ethernet, and now it is clear why the speed test
(http://www.speedtest.net/) shows a download speed of just 85 Mbps
when my contracted speed is 120 Mbps.


85Mbps sounds about right for a 100baseT NIC on one of those tests
(they typically use TCP). You can always verify your type of NIC using
ethtool.

My laptop has a 100baseT port. When I need gigabit, I use a USB3 gigabit
dongle. Note that you need USB3 for this--USB1.1 and USB2 aren't fast
enough.
--
- Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
- AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
--
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Paul Smith 
On Fri, Nov 13, 2015 at 10:18 PM, Rick Stevens  wrote:
>>
>> Thanks to all respondents! I could now determine that my network card
>> is a 100Mbps Fast Ethernet, and now it is clear why the speed test
>> (http://www.speedtest.net/) shows a download speed of just 85 Mbps
>> when my contracted speed is 120 Mbps.
>
> 85Mbps sounds about right for a 100baseT NIC on one of those tests
> (they typically use TCP). You can always verify your type of NIC using
> ethtool.
>
> My laptop has a 100baseT port. When I need gigabit, I use a USB3 gigabit
> dongle. Note that you need USB3 for this--USB1.1 and USB2 aren't fast
> enough.

Thanks, Rick. The idea of using a USB3 gigabit dongle is great --
better than replacing the network card!

Paul
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Paul Smith 
On Fri, Nov 13, 2015 at 6:06 PM, Rick Stevens  wrote:
>>>
>>> Is there something in Fedora that I might use to determine the
>>> maximum
>>> speed the network card of my computer can attain on Internet? I am
>>> thinking about wired Internet and not about wireless Internet.
>>>
>>> Thanks in advance,
>>
>>
>> You might need to explain the reason for your request since, it may
>> change the answer.
>>
>> As an example, my computer has a GigE port that runs to a 100Mbit
>> simple switch before getting to anything else.  So I would be limited
>> to a theoretical maximum of 100Mbit but I might want to know how fast I
>> can transfer files to/from another computer in my LAN.  The bottleneck
>> here could be the switch, my NIC, the other computers NIC, OS limits,
>> firewall slowdowns etc.
>>
>> So, for me I would really want to test an actual file transfer using a
>> number of setups.  Depending on each computer I could try Samba, FTP,
>> SCP.  I might run a wire to bypass the switch.  I might try with
>> firewalls and antivirus disabled.
>>
>> All this will also give me some clue on how fast I could run if I was
>> able to get a fiber connection, to let me know if my system would be a
>> serious limit to getting the full 1G of true fiber.  Obviously the
>> switch would have to be upgraded in my case.
>
>
> Generally speaking, any given NIC that has proper firmware and is in
> a relatively modern computer will run very close to the rated wire
> speed--provided the other end of the cable can handle it as well. Note
> that the effective transfer rate will usually be about 80-95% of that
> (for a 1Gbps NIC, 800-950Mbps).
>
> This does not include any overhead involved in the protocol used. You
> will find that things like FTP, rsync and the like will show lower
> data transmission rates (e.g. multiplying the number of bytes
> transferred by 8 to get number of bits transferred) due to their
> overhead and that they're dealing with TCP's inherent nagle algorithm
> and handshaking. TCP is designed to make sure things get to where
> they're supposed to go, and with that comes a lot of overhead. Things
> like UDR (rsync-over-UDP) will show much closer to the theoretical data
> transmission rate due to its use of UDP.
>
> The most common bottleneck to raw speed is the wire, switch, router,
> gateway or ISP that the NIC is connected to. You'll rarely find the NIC
> itself the limiting factor.

Thanks to all respondents! I could now determine that my network card
is a 100Mbps Fast Ethernet, and now it is clear why the speed test
(http://www.speedtest.net/) shows a download speed of just 85 Mbps
when my contracted speed is 120 Mbps.

Paul
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Rick Stevens 

On 11/13/2015 03:08 PM, Paul Smith wrote:

On Fri, Nov 13, 2015 at 10:18 PM, Rick Stevens  wrote:


Thanks to all respondents! I could now determine that my network card
is a 100Mbps Fast Ethernet, and now it is clear why the speed test
(http://www.speedtest.net/) shows a download speed of just 85 Mbps
when my contracted speed is 120 Mbps.


85Mbps sounds about right for a 100baseT NIC on one of those tests
(they typically use TCP). You can always verify your type of NIC using
ethtool.

My laptop has a 100baseT port. When I need gigabit, I use a USB3 gigabit
dongle. Note that you need USB3 for this--USB1.1 and USB2 aren't fast
enough.


Thanks, Rick. The idea of using a USB3 gigabit dongle is great --
better than replacing the network card!


One bit of advice...buy a good one. Don't get one of those el-cheapo
units. I use a "j5create" unit typically used with Macs (silver metallic
cover).
--
- Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
- AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
--
-They say when you play a Microsoft CD backwards, you'll hear-
-   Satanic messages, but if you play it forwards, it will install   -
-   Windows...which means Satan is in your system.   -
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread James Hogarth 
For internet use your likely bottleneck is your wan connection anyway... In
which case the usual places like speedtest.net apply for determining your
up and down throughout.

If you want to carry out throughout tests of systems you own then it's
worth looking at iperf
On 13 Nov 2015 13:25, "Paul Smith"  wrote:

> Dear All,
>
> Is there something in Fedora that I might use to determine the maximum
> speed the network card of my computer can attain on Internet? I am
> thinking about wired Internet and not about wireless Internet.
>
> Thanks in advance,
>
> Paul
> --
> users mailing list
> users@lists.fedoraproject.org
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
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>
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Fernando Cassia 
On Fri, Nov 13, 2015 at 10:25 AM, Paul Smith  wrote:

> Is there something in Fedora that I might use to determine the maximum
> speed the network card of my computer can attain on Internet?
>

Your Ethernet card will operate allways at its maximum speed (100Mbps if
Fast Ethernet or 1000 Mbps if Gigabit Ethernet with Cat5e or Cat6 cable),
until it reaches your Moderm/Router that connects you to your ISP, there is
the bottleneck, from your Modem/Router to "the cloud".

FC
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Derrik Walker v2.0 

On 11/13/2015 08:25 AM, Paul Smith wrote:

Dear All,

Is there something in Fedora that I might use to determine the maximum
speed the network card of my computer can attain on Internet? I am
thinking about wired Internet and not about wireless Internet.

Thanks in advance,

Paul

ethtool will list your network card's capabilities.

- Derrik
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Re: How can Fedora determine the maximum speed of network computer cards?

2015-11-13 Thread Doug H. 
On Fri, 2015-11-13 at 13:25 +, Paul Smith wrote:
> Dear All,
> 
> Is there something in Fedora that I might use to determine the
> maximum
> speed the network card of my computer can attain on Internet? I am
> thinking about wired Internet and not about wireless Internet.
> 
> Thanks in advance,

You might need to explain the reason for your request since, it may
change the answer.

As an example, my computer has a GigE port that runs to a 100Mbit
simple switch before getting to anything else.  So I would be limited
to a theoretical maximum of 100Mbit but I might want to know how fast I
can transfer files to/from another computer in my LAN.  The bottleneck
here could be the switch, my NIC, the other computers NIC, OS limits,
firewall slowdowns etc.

So, for me I would really want to test an actual file transfer using a
number of setups.  Depending on each computer I could try Samba, FTP,
SCP.  I might run a wire to bypass the switch.  I might try with
firewalls and antivirus disabled.

All this will also give me some clue on how fast I could run if I was
able to get a fiber connection, to let me know if my system would be a
serious limit to getting the full 1G of true fiber.  Obviously the
switch would have to be upgraded in my case.

-- 
Doug H.
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