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    SubjectFw: Intel PRO/1000 NIC
    Date
    Hello,

    Just in case you have a similar problem.

    The possible reason is that the on-board Inter 1000 chip of Dell PowerEdge
    1600SC is Intel 82540EM, which is running PCI 32/33 or PCI 32/66.

    Lisong

    ----- Original Message -----
    From: Lisong Xu
    To: netdev@oss.sgi.com ; linux-kernel@vger.kernel.org
    Sent: Monday, September 15, 2003 10:35 AM
    Subject: Intel PRO/1000 NIC


    Hello,

    I am sending UDP data from one PC to another PC directly through a cross
    cable. The NIC of sender is Intel® PRO/1000 MT Server Adapter, and the NIC
    of receiver is on-board Intel PRO/1000 (Dell PowerEdge 1600SC).

    After tuning the kernel and driver parameters, the sender can send data at
    1Gbps. But the receiver can only receive data at 620Mbps. (see the following
    ifconfig messages, 30 seconds test)

    *********** Sender *******************
    eth1 Link encap:Ethernet HWaddr 00:07:E9:17:84:36
    inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
    RX packets:111 errors:0 dropped:0 overruns:0 frame:0
    TX packets:418072 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:30000
    RX bytes:26193 (25.5 Kb) TX bytes:3759596626 (3585.4 Mb)
    Interrupt:24 Base address:0xccc0 Memory:fcd00000-fcd20000
    **************Receiver***********************
    eth0 Link encap:Ethernet HWaddr 00:C0:9F:1E:3A:46
    inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
    RX packets:261355 errors:156688 dropped:156688 overruns:156688
    frame:0 <---- Look here!!!!!
    TX packets:97 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:30000
    RX bytes:2350019728 (2241.1 Mb) TX bytes:22821 (22.2 Kb)
    Interrupt:11 Base address:0xecc0 Memory:fe100000-fe120000
    ***************************************************

    My questions is why so many packets are "errors, dropped, overruns". I have
    adjusted the "TxDescriptors, RxDescriptors, RxIntDelay,
    RxAbsIntDelay, TxIntDelay, TxAbsIntDelay" for different values, but always
    got similar result.

    Maybe here is not the right email list to send, but I am really frustrated
    with this problems, and hope to get some suggestions from the experts
    here.Any suggestion is really appreciated!

    Lisong

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