Maximum Transmission Unit - MTU

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MTU
  • HOW TO: Change the PPPoE MTU Size in Windows XP
    http://support.microsoft.com/?kbid=283165 (XP 4/24/2003)

  • Default MTU Size for Different Network Topology
    The Maximum Transfer Unit (MTU) specifies the maximum transmission unit size of an interface.
    http://support.microsoft.com/?kbid=314496 (XP 1/20/2002)

  • EasyMTU
    Internet Connection Speedup Toolkit EasyMTU is a free Windows 95/98 program that optimizes your TCP/IP settings for your dial-up adapter (MaxMTU, MaxMSS, DefaultTTL, and more).
    http://www.webattack.com/Freeware/system/fwsyspeed.shtml

  • AL's WINSOCK TUNING FAQ
    MTU / MSS / RWIN, TCP Trace, PPP Framing Errors, Com Overruns, etc.
    http://www.cerberus-sys.com/~belleisl/mtu_mss_rwin.html

  • EasyMTU
    Freeware designed to help you optimize your Internet connection.
    http://members.tripod.com/~EasyMTU/

  • TweakDUN
    Designed to help you optimize your Internet connection.
    http://www.pattersondesigns.com/tweakdun/

  • Utility: DRTCP: How do I use it, & what are all these settings?
    MTU setting tool. DRTCP works with Win95/98/98se/ME/2K/XP.
    http://www.dslreports.com/faq/578

  • Troubleshooting MTU Size in PPPoE Dialin Connectivity
    This document explains why the maximum transmission unit (MTU) size must be changed when you implement Point-to-Point Protocol over Ethernet (PPPoE) Dialin, and contains the procedure for making the change.
    http://www.cisco.com/warp/public/794/router_mtu.html

Ping
  • Pink Syntax Command-Line / Commands Summary. Windows 95.

  • VBNet
    How to Ping an IP Address Using Visual Basic. VB4-32, VB5, VB6.
    http://www.mvps.org/vbnet/code/network/ping.htm
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Welcome page

http://www.colba.net/~hlebo49/mtuping.htm












Ping Syntax

ping [-t] [-a] [-n count] [-l length] [-f] [-i ttl] [-v tos] [-r count] [-s count]
[[-j host-list] | [-k host-list]] [-w timeout] destination-list

Parameters

-t Pings the specified host until interrupted.
-a Specifies not to resolve addresses to host names.
-n count Sends the number of echo packets specified by count. The default is 4.
-l length Sends echo packets containing the amount of data specified by length. The default is 64 bytes; the maximum is 8192.
-f Sends a Do Not Fragment flag in the packet. The packet will not be fragmented by gateways on the route.
-i ttl Sets the Time To Live field to the value specified by ttl.
-v tos Sets the Type Of Service field to the value specified by tos.
-r count Records the route of the outgoing packet and the returning packet in the Record Route field. A minimum of 1 to a maximum of 9 hosts must be specified by count.
-s count Specifies the time stamp for the number of hops specified by count.
-j host-list Route packets by means of the list of hosts specified by host-list. Consecutive hosts may be separated by intermediate gateways (loose source routed). The maximum number allowed by IP is 9.
-k host-list Route packets by means of the list of hosts specified by host-list. Consecutive hosts may not be separated by intermediate gateways (strict source routed). The maximum number allowed by IP is 9.
-w timeout Specifies a time-out interval in milliseconds.
destination-list Specifies the remote hosts to ping.
Note on Ping
The ping command verifies connections to remote host or hosts, by sending Internet Control Message Protocol (ICMP) echo packets to the host and listening for echo reply packets. The ping command waits for up to 1 second for each packet sent and prints the number of packets transmitted and received. Each received packet is validated against the transmitted message. By default, four echo packets containing 64 bytes of data (a periodic upper case sequence of alphabetic characters) are transmitted.

You can use the ping utility to test both the host name and the IP address of the host. If the IP address is verified but the host name is not, you may have a name resolution problem. In this case, be sure that the host names you are querying is in either the local HOSTS file or in the DNS database.

The following shows sample output for ping:
C:\>ping www.internic.net

Pinging www.internic.net [192.0.34.161] with 32 bytes of data:
Reply from 192.0.34.161: bytes=32 time=101ms TTL=243
Reply from 192.0.34.161: bytes=32 time=100ms TTL=243
Reply from 192.0.34.161: bytes=32 time=120ms TTL=243
Reply from 192.0.34.161: bytes=32 time=120ms TTL=243

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