ndt-users list created

[Peter Van Epp <>]

        We are seeing a long rtt reported on 5.4.8. The rtt shouldn't be 
anywhere near 49 Msec, it should be closer to 1.

ping -c 100 -s 1452 sniffer1.ucs.sfu.ca
PING sniffer1.ucs.sfu.ca (142.58.200.253): 1452 data bytes
1460 bytes from 142.58.200.253: icmp_seq=0 ttl=62 time=1.057 ms
1460 bytes from 142.58.200.253: icmp_seq=1 ttl=62 time=0.999 ms
1460 bytes from 142.58.200.253: icmp_seq=2 ttl=62 time=1.008 ms
...
--- sniffer1.ucs.sfu.ca ping statistics ---
100 packets transmitted, 100 packets received, 0% packet loss
round-trip min/avg/max = 0.976/1.417/34.343 ms


WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 90.25Mb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 87.67Mb/s

        ------  Client System Details  ------
OS data: Name = Mac OS X, Architecture = ppc, Version = 10.3.9
Java data: Vendor = Apple Computer, Inc., Version = 1.4.2_09

        ------  Web100 Detailed Analysis  ------
100 Mbps FastEthernet link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 49.48 msec; the Packet size = 1460 
Bytes; and 
No packet loss - but packets arrived out-of-order 0.08% of the time
C2S throughput test: Packet queuing detected: 0.19%
S2C throughput test: Packet queuing detected: 8.21%
This connection is sender limited 100.0% of the time.

Web100 reports TCP negotiated the optional Performance Settings to: 
RFC 2018 Selective Acknowledgment: OFF
RFC 896 Nagle Algorithm: OFF
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF

Server 'sniffer1.ucs.sfu.ca' is not behind a firewall. [Connection to the 
ephemeral port was successful]
Client is probably behind a firewall. [Connection to the ephemeral port 
failed]
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Client IP addresses are preserved End-to-End

Peter Van Epp / Operations and Technical Support 
Simon Fraser University, Burnaby, B.C. Canada