Alfredo, By simultaneously watching the switch's statistics and pfcount, we see that initially the switch sees no pause frames and pfcount sees packets. When pfcount stops receiving packets, the switch immediately starts receiving lots and lots of pause frames. At this point, the only known remedy is to reload the kernel modules using load_dna_driver.sh.
Turning autonegotiation off doesn't change anything. I can't seem to turn off anything else (see below) [examples]$ sudo ethtool -A dna0 rx off [examples]$ sudo ethtool -a dna0 Pause parameters for dna0: Autonegotiate: on RX: on TX: on [examples]$ sudo ethtool -A dna0 tx off [examples]$ sudo ethtool -a dna0 Pause parameters for dna0: Autonegotiate: on RX: on TX: on =s= On Tue, Nov 29, 2011 at 6:07 PM, Alfredo Cardigliano <[email protected]> wrote: > Scott > it is possible that the flow control slows down a link, but in your case it > just stops. > If you want you can try with these commands to see if something changes: > ethtool -A dna0 autoneg off > ethtool -A dna0 off > ethtool -A dna0 tx off > > Alfredo > > On Nov 30, 2011, at 1:07 AM, Scott L wrote: > >> Alfredo, >> >> We looked at the statistics produced by our switch and discovered that >> when pfcount stops reporting received packets, we start seeing Pause >> frames from the Silicom NIC. This would account for the fact that we >> stop seeing packets. Have you seen this issue before? Any idea how >> we might resolve it? >> >> =s= >> >> On Tue, Nov 29, 2011 at 10:46 AM, Alfredo Cardigliano >> <[email protected]> wrote: >>> Scott >>> actually we recommend kernels > 2.6.18 with vanilla PF_RING, not with DNA. >>> However 2.6.31 should be fine. >>> Upgrading to a newer version is not a bad idea, if possible. Currently we >>> are mainly using 2.6.36 and newer kernels. >>> A asked you about 32/64bit just because there was an old 32bit dna library >>> in svn. >>> >>> Regards >>> Alfredo >>> >> _______________________________________________ >> Ntop-misc mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc _______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc
