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Thread: Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

  1. #1
    Join Date
    Dec 2008
    Beans
    25
    Distro
    Ubuntu 10.04 Lucid Lynx

    Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

    Hello Community,

    Im running two similar Dell PowerEdge R710 servers with Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20),
    Running Ubuntu 12.04.3 LTS with 3.8.0-33-generic kernel.
    Code:
    driver: bnx2
    version: 2.2.3
    firmware-version: 6.2.12 bc 5.2.3 NCSI 2.0.11
    bus-info: 0000:01:00.0
    supports-statistics: yes
    supports-test: yes
    supports-eeprom-access: yes
    supports-register-dump: yes
    ifconfig reports dropped RX packets
    Code:
    eth0      Link encap:Ethernet  HWaddr d4:ae:52:6e:07:81
    ...
    ...
              RX packets:117503 errors:0 dropped:33436 overruns:0 frame:0
              TX packets:89998 errors:0 dropped:0 overruns:0 carrier:0
    I've changed physical cables, checked switch for errors. Problem not there.

    What am I missing?

    Appreciate your help!

  2. #2
    Join Date
    Oct 2007
    Location
    Chennai, India
    Beans
    3,791
    Distro
    Ubuntu Development Release

    Re: Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

    Are your servers configured for ipv6? ipv6 frames received when the server is not configured for ipv6 go to the dropped packets counter.

    A quick way to check if the frames are legitimate drops is to run tcpdump in another terminal, and then watch the counter; if the counter continues to increment, then there is an actual fault that needs to be resolved.

    Are you facing any symptoms with your network, or just concerned about the dropped packet count?
    Cheers,PRShah
    Make your own: Ubuntu, Kubuntu, Xubuntu, Mythbuntu All-in-One Live DVD
    "I never make mistakes; I thought I did, once.. but I was wrong."

  3. #3
    Join Date
    Feb 2007
    Location
    West Hills CA
    Beans
    8,394
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

    If your server has dual ethernet ports, try using the other port. How old are these machines? It could simply be chip failure on the motherboard. How many power-on hours?

    Code:
    sudo smartctl -a /dev/sda | grep Power
    -------------------------------------
    Oooh Shiny: PopularPages

    Unumquodque potest reparantur. Patientia sit virtus.

  4. #4
    Join Date
    Dec 2008
    Beans
    25
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

    Hi,

    Thank you for the answers,

    I've disabled ipv6 support running these commands, did not help -
    Code:
    sysctl -w net.ipv6.conf.all.disable_ipv6=1
    sysctl -w net.ipv6.conf.default.disable_ipv6=1
    sysctl -w net.ipv6.conf.lo.disable_ipv6=1
    Reading all around the web, this is some kind of a known issue with Broadcom Ethernet cards but non talking about my driver version, only older once.

    Im not facing symptoms yet but servers are not yet in production, Im afraid to go live while this issue present.

    Pardon me,
    Maybe this thread fits better to Server Platforms forum

  5. #5
    Join Date
    Dec 2008
    Beans
    25
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Dell PowerEdge R710 /w Broadcom bnx2 Driver dropped RX packets

    Nagging a few to the DataCenter engineers where two of the servers are hosted brought a fix, well, nothing was actually broken.
    Following this technical KB by Novell, it's seems this behavior is by design in kernel > 3.x
    bpdufilter was configured on both switch ports servers were connected to and dropped packets are gone now.

    Yay!

    EDIT: I still believe this thread belongs to Server Platforms forum

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