network planning

[Eos]

I can't wrap my head around the speeds you guys are mentioning. I can do 700mb file transfers in 30 seconds between XP Pro SP2 on both machines. I did a big transfer Sunday; 70gb in 45 minutes.

How do you see the actual megabit per second speed or do you calculate based on file size and length of time to transfer?

 

[spidey07]

Originally posted by: eos
I can't wrap my head around the speeds you guys are mentioning. I can do 700mb file transfers in 30 seconds between XP Pro SP2 on both machines. I did a big transfer Sunday; 70gb in 45 minutes.

How do you see the actual megabit per second speed or do you calculate based on file size and length of time to transfer?

Take file size in Bytes. Divide by 10 then divide by time (seconds). That is a good rough estimate of throughput. Remember, Big B = bytes, little b = bits.

Down and dirty measurment is using windows task manager and the network tab.

 

[Eos]

Originally posted by: spidey07

Originally posted by: eos
I can't wrap my head around the speeds you guys are mentioning. I can do 700mb file transfers in 30 seconds between XP Pro SP2 on both machines. I did a big transfer Sunday; 70gb in 45 minutes.

How do you see the actual megabit per second speed or do you calculate based on file size and length of time to transfer?

Take file size in Bytes. Divide by 10 then divide by time (seconds). That is a good rough estimate of throughput. Remember, Big B = bytes, little b = bits.

Down and dirty measurment is using windows task manager and the network tab.

So, 700mB in 30 seconds is about 233mbps. Not bad from a 1.7ghz Athlon (labeled as 'hers' below). It's a whole hell of a lot faster than the 100mbps I used before.

Werd.

I love my gigabit LAN. Absolutely love it.

 

[p0lar]

Originally posted by: spidey07

Originally posted by: eos
I can't wrap my head around the speeds you guys are mentioning. I can do 700mb file transfers in 30 seconds between XP Pro SP2 on both machines. I did a big transfer Sunday; 70gb in 45 minutes.

How do you see the actual megabit per second speed or do you calculate based on file size and length of time to transfer?

Take file size in Bytes. Divide by 10 then divide by time (seconds). That is a good rough estimate of throughput. Remember, Big B = bytes, little b = bits.

There are some gotchas to exact calculation.

1) 1 byte = 8 bits
2) Also, the denominator of k, m, g is skewed...
1MB = 1024KB = 1024^2B
1Mb = 1000Kb = 1000^2b

Thus, 1 KB/s = 8.192 kbit/s; 1MB/s = 8.192 mbit/s

Therefore: 700MB in 30s = (700 * 1024 * 1024 * 8) / 30 = ~196 mbit/s
and, 70GB in 45m = (70 * 1024 * 1024 * 1024 * 8) / (45 * 60) = ~222 mbit/s


So yeah, in short, what Spidey said. Who wants to explain 95th? Anyone? Bueller?

 

[Eos]

Now that I'm home I just tested it again, and still getting about 200mbps when transferring 700MB from the 1.7 Athlon to my machine. In the Networking tab in Task Manager, that hit 25% during the transfer.

task manager

I looked through the manual on my switch today, but found nothing about jumbo frames. I'm not even sure I need an increase in speed.

I just can't recommend glan enough. Totally awesome.

 

[robmurphy]

You are getting the kind of increase I suggested i.e. 2 - 3 times 100 Meg ethernet.

Rob Murphy

 

[Pens1566]

Originally posted by: nweaver

Originally posted by: crasher88

Originally posted by: kevnich2
I don't believe a gigabit router was EVER mentioned here? Stay away from gigabit routers, go with a 100mb router and a larger gigabit switch with enough ports to accommodate your systems.

why do you say stay away from gigabit routers?

alright I think I might have this figured out but not totaly sure just one last question. How do switches work and handle mutlipul computer connected to the internet though it. Will it allow all the computers to access the internet at the same time? I appreciate all the help I'm just so uneducated on networking. I just don't want to drop alot of money on hardware just to find out that it doesn't work and have to spend even more money to get it to work or hier someone to come make it work for me.

Gig routers are spendy, and usually not as good as a dedicated switch. Since you don't need to route the gig traffic to the internet, your best bet is a good gig switch, uplinked to whatever router you want to use. Yes, uplinking a switch to the switch on the router will make one big happy network....

And all the ones I've seen (DLink 655, 4300, 4100) only support 4k jumbo frames. Get a dedicated Gig switch. Like others have said.

 

[Pens1566]

Originally posted by: eos
Now that I'm home I just tested it again, and still getting about 200mbps when transferring 700MB from the 1.7 Athlon to my machine. In the Networking tab in Task Manager, that hit 25% during the transfer.

task manager

I looked through the manual on my switch today, but found nothing about jumbo frames. I'm not even sure I need an increase in speed.

I just can't recommend glan enough. Totally awesome.

It will only tell you what size it supports anyway. If you want to change it, it's a setting on your individual NICs themselves. It's probably at 1500 (default). Try changing them all to 9000 if they'll go that high.