The generator box seems to be resetting the controller (and therefore the link) Check out ethtool stats on both side and look for tx_timeout.
-- Jesse Brandeburg's iPhone On Jun 13, 2011, at 1:35 PM, "Ben Greear" <[email protected]> wrote: > I have a traffic generator system with e1000e running pktgen, and emulator > (bridge-ish) > system with igb (3.0.19 driver). When we add jitter on the emulator, > and only then, we start seeing link bounces. > > If we use the stock 2.6.38.8 igb driver on the emulator, we do not see link > bounces. The kernel logs make me *think* that it's the generator that > is resetting the link, however. > > We tried two different generators, but both were e1000e NICs. > > I'm curious if anyone has any suggestions about how to tell which > NIC is causing the resets, and why it might be doing so. > > Here are kernel logs from the generator: > > e1000e: eth2 NIC Link is Down > e1000e 0000:08:00.0: eth2: Reset adapter > e1000e: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx > e1000e: eth3 NIC Link is Down > e1000e 0000:08:00.1: eth3: Reset adapter > e1000e: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx > e1000e: eth2 NIC Link is Down > e1000e 0000:08:00.0: eth2: Reset adapter > e1000e: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx > e1000e: eth3 NIC Link is Down > e1000e 0000:08:00.1: eth3: Reset adapter > e1000e: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx > e1000e: eth2 NIC Link is Down > e1000e 0000:08:00.0: eth2: Reset adapter > e1000e: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx > [root@simech2 ~]# ethtool -i eth3 > driver: e1000e > version: 1.2.20-k2 > firmware-version: 5.6-2 > bus-info: 0000:08:00.1 > > And here is from the emulator: > > igb: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX > ADDRCONF(NETDEV_CHANGE): eth2: link becomes ready > igb: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX > ADDRCONF(NETDEV_CHANGE): eth3: link becomes ready > igb: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX > ADDRCONF(NETDEV_CHANGE): eth2: link becomes ready > igb: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX > ADDRCONF(NETDEV_CHANGE): eth2: link becomes ready > igb: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX > ADDRCONF(NETDEV_CHANGE): eth3: link becomes ready > > > Thanks, > Ben > > -- > Ben Greear <[email protected]> > Candela Technologies Inc http://www.candelatech.com > > > ------------------------------------------------------------------------------ > EditLive Enterprise is the world's most technically advanced content > authoring tool. Experience the power of Track Changes, Inline Image > Editing and ensure content is compliant with Accessibility Checking. > http://p.sf.net/sfu/ephox-dev2dev > _______________________________________________ > E1000-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/e1000-devel > To learn more about Intel® Ethernet, visit > http://communities.intel.com/community/wired ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
