ltCatscratch
join:2008-04-17
edit:
April 17th, @10:47AM
| [DSL] MTU 1472 1492 Confusion
1. »/tweakr/block:···terpppoe
2. N/A
3. N/A
4. DSL, TTNET, Zoom x4 router
5&6 PPPoE, no software, on router
7. Windows XP SP2
8. 1024/256
9. LAN
10. NAT on Zoom x4 router
11. N/A
Well, i need to know why dslreports.com says 1472 as MRU and MTU while it's set 1492 on the router.
Extra:
Pinging dslreports.com [209.123.109.175] with 1472 bytes of data:
Reply from 209.123.109.175: bytes=1472 time=299ms TTL=50
Reply from 209.123.109.175: bytes=1472 time=302ms TTL=50
Reply from 209.123.109.175: bytes=1472 time=303ms TTL=50
Reply from 209.123.109.175: bytes=1472 time=302ms TTL=50
Ping statistics for 209.123.109.175:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 299ms, Maximum = 303ms, Average = 301ms
Pinging dslreports.com [209.123.109.175] with 1492 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Reply from 209.123.109.175: bytes=1492 time=307ms TTL=50
Ping statistics for 209.123.109.175:
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
Approximate round trip times in milli-seconds:
Minimum = 307ms, Maximum = 307ms, Average = 307ms |
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Irish Shark
Play Like A Champion Today
Premium,MVM
join:2000-07-29
Las Vegas, NV
| said by ltCatscratch  :Well, i need to know why dslreports.com says 1472 as MRU and MTU while it's set 1492 on the router. Where do you see that?
The router's MTU is set the same as the NIC's MTU. It looks like you are in Turkey??? Some countries use 1472 for the MTU. If that is your case, the router is also set to 1472.
--
"You can observe a lot by watching". Yogi Berra |
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ltCatscratch
join:2008-04-17
edit:
April 21st, @10:23AM
| 
The test was done after exiting uTorrent. There are packet losses because the connections live too long, this is not the case when some time passes after i close the program and retest, normally there're no retransmitted packets and the efficiency is %100.
Well, i don't know if my ISP uses 1472 as default, there are no info about that anywhere. Do I need to set router to 1472 as well if tweaktester reports so ? Would having 1492 while ISP using 1472 cause anything serious ? I ask that because when utorrent or emule is running, web sites load very slow or freeze. I know it's normal to have slow web while using p2p programs however most of the time web pages just time out, and even say wrong url while it's right, and refreshing page fixes the problem. And this happens at low d/l and u/l, so it's not speed relevant, more like after a number of connections, packet loss becomes a major problem. |
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Irish Shark
Play Like A Champion Today
Premium,MVM
join:2000-07-29
Las Vegas, NV | You can call your ISP and ask what MTU they use. I think it is 1472.
What ever the MTU is, the router is set to that.
--
"You can observe a lot by watching". Yogi Berra |
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