On Thu, Jan 20, 2005 at 01:04:23PM +, Ben Golding wrote:
> > > FYI, I tested this in the company LAN and the largest value that got
> > > through was 1472.
> >
> > Ethernet's MTU is 1500. IP uses 28 bytes, so that leaves 1472 bytes
> > for data. UDP uses additional 8 bytes and TCP 20 bytes.
>
> > FYI, I tested this in the company LAN and the largest value that got
> > through was 1472.
>
> Ethernet's MTU is 1500. IP uses 28 bytes, so that leaves 1472 bytes
> for data. UDP uses additional 8 bytes and TCP 20 bytes.
Thanks Mika, in other words if you can ping with "-l 1472" as the
maximu
On Thu, 20 Jan 2005 11:49:12 +0200, Constantine Dokolas
<[EMAIL PROTECTED]> wrote:
> Hmm... I thought there was an easier way... whatever. I must remember old
> PPP connection logs (or was that some other protocol?).
Yes, PPP is used to encapsulate TCP/IP over modem lines. PPP's
derivates (PPPoE
Mika Hirvonen wrote:
On Thu, 20 Jan 2005 11:18:47 +0200, Constantine Dokolas
<[EMAIL PROTECTED]> wrote:
Ben Golding wrote:
I think 576 is the recommendation for best performance whether on ADSL
or dial-up, several sites seem to confirm this eg:
http://www.jimschrempp.com/features/computer/mtuspeed.
On Thu, 20 Jan 2005 11:18:47 +0200, Constantine Dokolas
<[EMAIL PROTECTED]> wrote:
> Ben Golding wrote:
> > I think 576 is the recommendation for best performance whether on ADSL
> > or dial-up, several sites seem to confirm this eg:
> >
> > http://www.jimschrempp.com/features/computer/mtuspeed.htm
Ben Golding wrote:
I think 576 is the recommendation for best performance whether on ADSL
or dial-up, several sites seem to confirm this eg:
http://www.jimschrempp.com/features/computer/mtuspeed.htm
MTU = 1500 is normal for Ethernet LANs.
How can I find out the MTU for my dial-up on a W2K machine?
On Wed, 19 Jan 2005 18:04:25 +, Ben Golding <[EMAIL PROTECTED]> wrote:
> Anyway, here is some interesting info about finding your personal max
> MTU:
> http://www.internetweekly.org/llarrow/mtumss.html
> http://members.tripod.com/~EasyMTU/easymtu/findmtu.html
Nifty. I'm getting somewhere betw
"Are you saying that hosts are required to support MTUs of at least 576
bytes? People have said that some dialup connections use 256 byte MTUs... "
Since it says "HOSTS MUST NOT SEND DATAGRAMS LARGER THAN 576 OCTETS"
there is no inherent contradiction when it is *smaller* then 576, me thinks?
H
On Wed, 19 Jan 2005, Toad wrote:
> Are you saying that hosts are required to support MTUs of at least 576
> bytes? People have said that some dialup connections use 256 byte
> MTUs...
> > RFC879> HOSTS MUST NOT SEND DATAGRAMS LARGER THAN 576 OCTETS UNLESS
Isn't MTU something which is neg
On Wed, 19 Jan 2005 19:16:44 +, Toad <[EMAIL PROTECTED]> wrote:
> Are you saying that hosts are required to support MTUs of at least 576
> bytes? People have said that some dialup connections use 256 byte
> MTUs...
Hrm. Dialup. The MTU includes the PPP header is max. 30 bytes, IP
header can be
Are you saying that hosts are required to support MTUs of at least 576
bytes? People have said that some dialup connections use 256 byte
MTUs...
On Wed, Jan 19, 2005 at 06:04:25PM +, Ben Golding wrote:
> Toad> "Please find me an internet standard that mentions an MTU of 576
> bytes"
>
> RFC87
Toad> "Please find me an internet standard that mentions an MTU of 576
bytes"
RFC879> HOSTS MUST NOT SEND DATAGRAMS LARGER THAN 576 OCTETS UNLESS
THEY
RFC879> HAVE SPECIFIC KNOWLEDGE THAT THE DESTINATION HOST IS
PREPARED TO
RFC879> ACCEPT LARGER DATAGRAMS.
RFC879>
RFC879> Th
On Wed, Jan 19, 2005 at 04:36:11PM +, Toad wrote:
> Yuck! I'm skeptical... Could well be snake oil. Please find me an
> internet standard that mentions an MTU of 576 bytes - or even some cisco
> documentation. It seems pretty clear that bigger is better within the
> limits available...
Bigger=H
Yuck! I'm skeptical... Could well be snake oil. Please find me an
internet standard that mentions an MTU of 576 bytes - or even some cisco
documentation. It seems pretty clear that bigger is better within the
limits available...
On Wed, Jan 19, 2005 at 04:32:02PM +, Ben Golding wrote:
> I thin
I think 576 is the recommendation for best performance whether on ADSL
or dial-up, several sites seem to confirm this eg:
http://www.jimschrempp.com/features/computer/mtuspeed.htm
MTU = 1500 is normal for Ethernet LANs.
Ben Golding
___
Support mailing
What's the typical MTU on a modem? Someone said he had seen one with 256
bytes, but is that typical?
--
Matthew J Toseland - [EMAIL PROTECTED]
Freenet Project Official Codemonkey - http://freenetproject.org/
ICTHUS - Nothing is impossible. Our Boss says so.
signature.asc
Description: Digital sig
16 matches
Mail list logo