Interactions with mxge, pf, nfsd, and the kernel

[Bob Healey]

For an unscientific test,  tcpdump -i bce1 for ~5 seconds gave these stats:

321 packets captured
53776 packets received by filter
52703 packets dropped by kernel

tcpdump -i mxge0 gave these stats:
17 packets captured
19 packets received by filter
0 packets dropped by kernel

For the switch end of mxge0:
HP-E2910al-48G# show uptime
0030:15:06:05.60
HP-E2910al-48G# show interfaces a1

  Status and Counters - Port Counters for port A1

   Name  : Redwing 10G
   MAC Address      : 68b599-954a8f
   Link Status      : Up
   Totals (Since boot or last clear) :
    Bytes Rx        : 2,312,764,644      Bytes Tx        : 3,924,158,811
    Unicast Rx      : 202,711,900        Unicast Tx      : 250,819,176
    Bcast/Mcast Rx  : 42,603             Bcast/Mcast Tx  : 439,196
   Errors (Since boot or last clear) :
    FCS Rx          : 0                  Drops Tx        : 0
    Alignment Rx    : 0                  Collisions Tx   : 0
    Runts Rx        : 0                  Late Colln Tx   : 0
    Giants Rx       : 0                  Excessive Colln : 0
    Total Rx Errors : 0                  Deferred Tx     : 0
   Others (Since boot or last clear) :
    Discard Rx      : 0                  Out Queue Len   : 0
    Unknown Protos  : 0
   Rates (5 minute weighted average) :
    Total Rx (Kbps) : 49,816             Total Tx (Kbps) : 61,824
    Unicast Rx (Pkts/sec) : 305          Unicast Tx (Pkts/sec) : 404
    B/Mcast Rx (Pkts/sec) : 0            B/Mcast Tx (Pkts/sec) : 0
    Utilization Rx  : 00.49 %            Utilization Tx  : 00.61 %


HP-E2910al-48G#

Switch has been up 30 days, no counters have been cleared

Bob Healey
Systems Administrator
Biocomputation and Bioinformatics Constellation
and Molecularium
healer at rpi.edu
(518) 276-4407

On 7/8/2014 9:25 AM, Kurt Jaeger wrote:
> Hi!
>
>> I've been running one of these machines without pf, and it has ceased
>> responding on all interfaces (mxge and bce).
>> The console still works fine
> Is a tcpdump on one of the interfaces seeing any traffic ? arp ? multicast ?
>
> Is a tcpdump seeing any outgoing packets if you send them ?
>
> If you plug in a cross cable to some other host, does it see
> bytes on the interface if you try to send traffic ?
>
> Does
>
> ifconfig <if> down
> ifconfig <if> up
>
> help ? Is the switch still seeing a link ? Does it change if you
> ifconfig down ?
>
> Does it change if you unplug and re-plug the cable ?
>