could someone give me an indepth def. of time to live(TTL) and recieve window(rwin)

[bigslammer]

trying out different registry values and I've noticed that though my ping isn't lower my game play doesn't lag at all when I lower the RWIN but as a consquence my download speeds which use to be around 5.3 kbps is now down to 4.8 kbps. but yeah i'm in video game heaven now. /forum/smile.gif. also any in depth explanation and theories of mtu and mss would be appreciated. thx

[reddog4629]

Read the stuff here-
http://www.pattersondesigns.com/tweakdun/works.htm
I have played with these settings for weeks and this is what I use on my 56k dial-up--
MTU=576 (This seems to be an industry "standard").
MSS=536 (MTU-40bytes for packet header)
TTL=128
Auto Discovery=Enabled
Black Hole Detect=Off
RWIN=2680 (MSSx5)
U can play with the RWIN number but I'll bet you end up with either 2680 or 2144.
Have fun. /forum/smile.gif
P.S. Be aware of the gotch-yas, i.e. net congestion,line conditions,etc.that could give you erratic results and drive you insane. DOOARHGAOROHGDOoooohoohohhohaaaaaeeee


[This message has been edited by reddog4629 (edited 11-18-1999).]

[This message has been edited by reddog4629 (edited 11-18-1999).]

[bigslammer]

I see we're in the same boat. yes I've played around with it and 2144 seems pretty good. also my mtu is set at 288 and mss at 248. ttl is at 64 this gives me really good network play. gonna try some more. honestly I think i've tried like 150 different combinations. arrggggghhhhhh. sooo much time wasted.

[socalgal]

I tried those MTU/MSS/TTL regedits too and they didn't seem to do much for me at the time. But it was still interesting to try them. /forum/smile.gif

Hopefully you will find some details here.

http://www.ora.com/reference/dictionary/

TTL (Time-To-Live)

An 8-bit field in an IP packet header that is set to the maximum number of routers a message could pass through to reach a destination (typically 15).

The field is decremented by each router that handles the packet. If it is decremented to zero, that router discards the packet and should send an ICMP TTL exceeded message back to the sender. This capability ensures that packets cannot get stuck in a loop (therefore creating significant network loading) because of a network problem such as (possibly temporarily) incorrect routing tables.

http://support.microsoft.com/support/kb/articles/q183/4/37.asp

MTU is the Maximum Transmission Unit of a network. This is the greatest amount of data or "packet" size that can be transferred in one physical frame on a network. Fragmentation of packets occurs if a packet is sent across a network that has an MTU smaller than the packet's frame length. This leads to reduced performance levels as fragments need to be reassembled.

The Internet standard for MTU is 576. When you connect to an Internet resource, your data may have to go through a router that has an MTU of 576. This results in fragmentation if your MTU is greater than 576, which can result in a Web resource being loaded slowly.

Also, see: http://support.microsoft.com/support/kb/articles/Q140/3/75.asp

Couldn't seem to find alot on MSS though..

There is sooo much info on this topic! Here's just a couple:

http://www.webcom.com/~llarrow/comfaqs.html
http://support.microsoft.com/support/kb/articles/Q158/4/74.ASP [/URL]
http://www.webcom.com/~llarrow/mtumss.html

ok, three, and more than you probably wanted to know.. /forum/smile.gif




[This message has been edited by socalgal (edited 11-18-1999).]

[bigslammer]

thx socalgal i'll take a look into it. keep up the good work