NIC: 03:0e.0 Ethernet controller: Intel Corporation 82545GM Gigabit Ethernet Controller (rev 04) linux device driver: ksa@osiris $ modinfo e1000 filename: /lib/modules/2.6.9-55.0.2.ELsmp/kernel/drivers/net/e1000/e1000.ko author: Intel Corporation, description: Intel(R) PRO/1000 Network Driver license: GPL version: 7.2.7-k2-NAPI B024014F7239D211AAA851C parm: debug:Debug level (0=none,...,16=all) parm: TxDescriptors:Number of transmit descriptors parm: RxDescriptors:Number of receive descriptors parm: Speed:Speed setting parm: Duplex:Duplex setting parm: AutoNeg:Advertised auto-negotiation setting parm: FlowControl:Flow Control setting parm: XsumRX:Disable or enable Receive Checksum offload parm: TxIntDelay:Transmit Interrupt Delay parm: TxAbsIntDelay:Transmit Absolute Interrupt Delay parm: RxIntDelay:Receive Interrupt Delay parm: RxAbsIntDelay:Receive Absolute Interrupt Delay parm: InterruptThrottleRate:Interrupt Throttling Rate parm: SmartPowerDownEnable:Enable PHY smart power down parm: KumeranLockLoss:Enable Kumeran lock loss workaround vermagic: 2.6.9-55.0.2.ELsmp SMP 686 REGPARM 4KSTACKS gcc-3.4 depends: TCP/Web100 Network Diagnostic Tool v5.4.8 click START to begin Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done checking for firewalls . . . . . . . . . . . . . . . . . . . Done running 10s outbound test (client-to-server [C2S]) . . . . . 94.10Mb/s running 10s inbound test (server-to-client [S2C]) . . . . . . 45.58Mb/s The slowest link in the end-to-end path is a 100 Mbps Full duplex Fast Ethernet subnet Warning: Old Duplex mismatch condition detected: click START to re-test ---- WEB100 Enabled Statistics: Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done checking for firewalls . . . . . . . . . . . . . . . . . . . Done running 10s outbound test (client-to-server [C2S]) . . . . . 94.10Mb/s running 10s inbound test (server-to-client [S2C]) . . . . . . 45.58Mb/s ------ Client System Details ------ OS data: Name = Linux, Architecture = i386, Version = 2.6.9-55.0.2.ELsmp Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_11 ------ Web100 Detailed Analysis ------ 100 Mbps FastEthernet link found. Link set to Full Duplex mode No network congestion discovered. Good network cable(s) found Warning: Old Duplex mismatch condition detected: Web100 reports the Round trip time = 7.0 msec; the Packet size = 1448 Bytes; and There were 1328 packets retransmitted, 2846 duplicate acks received, and 4048 SACK blocks received The connection stalled 26 times due to packet loss The connection was idle 5.41 seconds (54.1%) of the time C2S throughput test: Packet queuing detected: 0.09% S2C throughput test: Packet queuing detected: 0.11% This connection is network limited 99.49% of the time. Web100 reports TCP negotiated the optional Performance Settings to: RFC 2018 Selective Acknowledgment: ON RFC 896 Nagle Algorithm: ON RFC 3168 Explicit Congestion Notification: OFF RFC 1323 Time Stamping: ON RFC 1323 Window Scaling: ON Server 'nettest5.slac.stanford.edu' is not behind a firewall. [Connection to the ephemeral port was successful] Client is not behind a firewall. [Connection to the ephemeral port was successful] Information: Network Middlebox is modifying MSS variable Server IP addresses are preserved End-to-End Client IP addresses are preserved End-to-End