Info

[Lobo]

Media Access Control (MAC)
The MAC sits between the upstream and downstream portions of the cable modem, and acts as the interface between the hardware and software portions of the various network protocols. All computer network devices have MACs, but in the case of a cable modem the tasks are more complex than those of a normal network interface card. For this reason, in most cases, some of the MAC functions will be assigned to a central processing unit (CPU) -- either the CPU in the cable modem, or the CPU of the user's system. Hence, the CPU does affect the speed of the cable modem as does the NIC. All NIC's use some CPU cycles to process information. If the CPU is faster, then the processing of that info will be faster and therefore download and uploads will be faster...this can be found on the site http://www.howstuffworks.com/

[HalfLifer]

To summarize:

A code that identifies a piece of networking equipment.

[Lobo]

Been meaning to ask you that advertising in your sig, does his patch come with RWIN of 64240, and why does he have patches for different size CPU's if size does not matter :) :) :)

[Lobo]

Hence, the CPU does affect the speed of the cable modem as does the NIC. All NIC's use some CPU cycles to process information. If the CPU is faster, then the processing of that info will be faster and therefore download and uploads will be faster...this can be found on the site http://www.howstuffworks.com/

[Lobo]

I see in tweaking all you need is OS, I disagree again, I beleive RAM matters and CPU size, since you did not answer last question try this one, why in your analyzer do you have Cablenuts patch in, when below you say those are the best patches, you mean their good enough for everyone else but not you? I have alot more so if you want to play. play:
HalfLifer
The DQ Kid

Registered: Jul 2000
Location: Detroit, Michigan
Posts: 1742
Changing MTU in Win2k
How do I?
Look what I get with Cablenut installed:

How do I change my MTU in Win2k?

TCP options string = 0204001c0103030201010402

MTU = 68
MTU value is too small ! Consider increasing your MTU to 1500 for better throughput.

MSS = 28
Maximum useful data in each packet = 28, which is equal to MSS.
MSS is not optimized for broadband. Consider increasing your MTU value.

Default Receive Window (RWIN) = 204400
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 51100
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
524160 (MSS x 2340 * scale factor of 8)
262080 (MSS x 2340 * scale factor of 4)
131040 (MSS x 2340 * scale factor of 2)
65520 (MSS x 2340)

bandwidth * delay product:
Your RcvWindow limits you to: 8176 kbps (1022 KBytes/s) @ 200ms
Your RcvWindow limits you to: 3270.4 kbps (408.8 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = OFF

Time to live left = 52 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000


__________________
Assistant Administrator of CyberwizardPit
Windows 2000 Ramdrive!

Good speeds Achieved by The best Advanced tweaks for all connections and OS's.


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05-31-2001 03:00 PM

:)

[HalfLifer]

Lobo,

The spam isnt needed. I use a rwin of 64240, thru testing, and I find it works better than a higher one.


Those tweaks may require a faster machine *BECAUSE* it raises the NIC's buffer and uses some RAM to do it.


When doing a RWIN, CPU power doesnt matter. You ask them their cpu power, etc and ya give them same rwin as any other person.


Oh, heres this:

TCP options string = 020405b40103030001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 64240
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 64240
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)

bandwidth * delay product:
Your RcvWindow limits you to: 2569.6 kbps (321.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1027.84 kbps (128.48 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 20 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000




Funny it says Im limited to around 328K/sec yet I still pull into the 700's :D



BTW, what you SHOULD do is ask if they have a 3com or Intel nic card, since they use *0* cpu cycles, like mine :)

[Lobo]

The question above is still not answered, I am glad you did get good speeds with lower RWIN, but that does not mean everyone does, so that is why you only need OS, because you have only 1 RWIN to offer, weak. RAM does not matter, CPU size does not matter, was not to long ago you ran RWIN of 512512, MTU 1496, that's a pretty big RWIN, maybe you should talk to Bill Gates:) :)

[HalfLifer]

You're odd man. Really odd.

[Lobo]

No I beleive your odd, CPU does not mater when it clearly saids above it does, how many fine people in this forum have asked for system specs, when you register it asks that, everyone is wrong but you, all we need is OS, I need proof my friend, that way we will all learn the right way

[HalfLifer]

I love you too.