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Protocol Error Ndt

running 10s outbound test (client-to-server [C2S]) . . . . . 94.05Mb/s running 10s inbound test (server-to-client [S2C]) . . . . . . This tcpdump trace dump is only started when the -t, --tcpdump options are set by the NDT administrator. WinScaleRcvd The value of the received window scale option if one was received; otherwise, a value of -1. No message is shorter than 3 octets. click site

Done checking for firewalls . . . . . . . . . . . . . . . . . . . Known Issues (Theoretical Maximum Throughput) The Theoretical Maximum Throughput should be computed to receive Mbps instead of Mibps. Testing with a > > laptop running MS Vista, using Firefox, I get no errors. > > > > Here are the different versions of things on the server: > > So I searched and got one that no one in queue. [1]http://measurementlab.net/measurement-lab-tools.html#ndt is gone. https://lists.internet2.edu/sympa/arc/ndt-users/2007-06/msg00002.html

To avoid extremely long waits during very busy times, NDT will reject newly arriving tests if the queue grows too large. Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 9 Star 38 Fork 19 ndt-project/ndt Code Issues 41 Pull requests 2 Projects NDT implements the above heuristic by checking that the following conditions are all true: The throughput measured during the Server-To-Client test is greater than 50 Mbps The Total Send Throughput is See SRTT in RFC2988.

  • The Server will only send these messages to the queued Clients that requested TEST_STATUS test.
  • The NDTP-Control is designed to support the negotiation of test sessions and results retrieval in a straightforward manner.
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  • It uses a well-defined protocol (Network Diagnostic Tool Protocol - NDTP) to provide a reliable communication link between client and server.
  • or Protocol error!
  • Duplex Mismatch Detection Duplex mismatch is a condition whereby the host Network Interface Card (NIC) and building switch port fail to agree on whether to operate at 'half-duplex' or 'full-duplex'.
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  • The both messages looks as following: After performing the Simple firewall test in both directions, the Server MUST send to the Client its SFW results encoded as string in the TEST_MSG

Networking, especially DSL/Cable and WiFi, have become notedly faster than when the bin boundaries were first defined. Share 0 comments: Post a Comment Older Post Newer Post Subscribe to: Post Comments (Atom) ~ Home ? Please try again later. MinMSS The minimum MSS, in octets.

The server performs a 5 second throughput test over the connection The server can temporarily stop sending packets when the following formula is fulfilled: BUFFER_SIZE * 16 < ((Next Sequence Number The Total Send Throughput is computed using the following formula: DataBytesOut / TotalTestTime * 8 where: DataBytesOut - The number of octets of data contained in transmitted segments, including retransmitted data. AckPktsOut The number of pure ack packets that have been sent on this connection by the Local Host. Done.

Is that the host you were running the test to?Cheers,AaronPost by Jianan WangAny help is appreciated.Thanks.--Jianan WangDepartment of Electrical and Computer Engineering, Duke UniversityDepartment of Optical Engineering, ZJU Information EngineeringQizhen Leadership The Server's MSG_LOGIN message looks as following: This list is a string containing space separated numbers that describes the particular tests. These detection algorithms and heuristics were developed based on an analytical model of the TCP connection, and were tuned during tests performed in real LAN, MAN and WAN environments. The measured client to server throughput rate exceeded 50 Mbps.

PktsOut The total number of segments sent. The second heuristic is used to discover if an internal network link has a duplex mismatch condition. The Theoretical Maximum Throughput over this link is less than 2 Mbps. Full/Half Link Duplex Setting NDT has a heuristic to detect a half-duplex link in the path.

Table of Contents Introduction NDT is a typical memory to memory client/server test device. get redirected here connection to the random port was possible and the pre-defined string was received) | | "2" | There was a connection to the random port, but the pre-defined string was not Additionally, the NDTP-Control defines an exact message format, which greatly increase the general protocol reliability and allows other NDTP-Tests protocols to communicate in a convenient and a more structured fashion. The general test workflow is as follows: The server selects a random port and opens a socket on that port The server sends this port number to the client The client

The general test workflow is as follows: The server selects a random port and opens a socket on that port The server sends this port number to the client The client But why error when test with my ndt server by web100clt ??? MSS Modification Detection NDT checks packet size preservation by comparing the final value of the MSS variable in the Middlebox test (the NDT Server sets the MSS value to 1456 on navigate to this website However to support older clients which does not use this, NDT server first recognizes if client supports such encoding (that is if client sent MSG_EXTENDED_LOGIN message) and if not, then messages

When the NDT Server decides that the Client can start its test session, it sends the SRV_QUEUE message with value "0": The SRV_QUEUE messages are only sent to the queued Clients. Done > > checking for firewalls . . . . . . . . . . . . . . . . . . . S2C throughput test FAILED!

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the test results shown as follows : Testing network path for configuration and performance problems -- Using IPv4 address Requesting test suite: > Middlebox test > Simple firewall test > C2S Protocol error! DSL/Cable modem The link is treated as a DSL/Cable modem when the NDT Server isn't a bottleneck and the Total Send Throughput is less than 2 Mbps and less than the C2S protocol All messages exchanged between the Client and the Server during the C2S protocol are sent using the same connection and message format as the NDTP-Control protocol.

Powered by Sympa 6.1b.4 Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox. Client MUST drop the connection after receiving this message. At the end the Server MUST close the whole test session by sending an empty MSG_LOGOUT message and closing connection with the Client. http://spamdestructor.com/protocol-error/protocol-error-cdb.php MaxRTT The maximum sampled round trip time.

You signed out in another tab or window. You signed in with another tab or window. Print recommendations based on some calculations, or display * values of settings that have been detected. * * @param tests test indicator character * @param testresult_str Result string obtained at the Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 9 Star 38 Fork 19 ndt-project/ndt Code Issues 41 Pull requests 2 Projects

SndLimTimeSender The cumulative time spent in the 'Sender Limited' state. It also wouldn’t detect bonded Etherchannel interfaces. We recommend upgrading to the latest Safari, Google Chrome, or Firefox. We need to see what the server is sending to cause this. <-- S2C throughput test --> Protocol error - missed prepare message!

IEEE 802.11 (WiFi) The link is treated as a wireless one when the DSL/Cable modem is not detected, the NDT Client is a bottleneck and the Total Send Throughput is less