Thanks to those who gave suggestions on and off list...We found the issue was a physical one (someone unfamiliar with fiber optic taps had installed the optics incorrectly on the server side)...I suspected a problem at this level but wanted to rule out the software side in parallel... :)
Cheers, Jesse On Fri, Jan 3, 2014 at 5:42 AM, Chris Wakelin <[email protected]>wrote: > We use port mirroring from Extreme Networks border switches. They add > VLAN tags to only one direction of the traffic, which can cause issues > like this. Apparently this is by design! Could your issue be similar? > > In our case, we need to do something like "tcpdump -i eth0 'host x.x.x.x > or (vlan and host x.x.x.x)'" to see both sides of a conversation. > > Best Wishes, > Chris > > On 03/01/14 03:04, Jesse Bowling wrote: > > Hi, > > > > I recently switched from using the igb driver (with multiple 1 Gb > > connections) to using the ixgbe driver with a single 10 Gb connection. In > > the process of this change we moved from some 1 gb taps to a new 10 gb > tap. > > > > Since the changeover, I've found that I'm only seeing half the > > conversation, specifically only the inbound side. I suspect tap > > misconfiguration, but I'd like to diagnose "my" side of the process > > (PF_RING on Linux). > > > > Does anyone have any advice on how I can rule out any issues on the > PF_RING > > side? Running 5.5.4 ($Revision: 6357$)... > > > > Cheers, > > > > Jesse > > > > > > > > _______________________________________________ > > Ntop-misc mailing list > > [email protected] > > http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > > > > -- > --+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+- > Christopher Wakelin, [email protected] > IT Services Centre, The University of Reading, Tel: +44 (0)118 378 8439 > Whiteknights, Reading, RG6 2AF, UK Fax: +44 (0)118 975 3094 > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc > -- Jesse Bowling
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