Ben, Thanks. When I remove the "vlan_id" command from the script I do see PKTGEN packets on UDP port 9. These are captured by "tcpdump -f udp port 9" (UDP port 9 is used by default by PKTGEN, I assume that most people here probably know ). The thing is that I do want to generate VLAN tagged traffic. BTW, if I do configure a VLAN on eth0 , I do see VLAN packets (pavkets with ethertype of VLAN), when sniffing with something like "tethereal -R "vlan and host x.y.z.q Any idea why with pktgen I cannot see VLAN traffic ? Regards, Ian On Jan 28, 2008 6:50 PM, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote: > Ian Brown wrote: > > Hello, > > I must first say that this question was sent more than two days ago to > > tcpdump-workers but there was no answer, so I hope I will get some help > > from the VLAN gurus around. > > > > > > - I am using pktgen on Linux to generate vlan traffic. > > > The NIC probably strips the headers before sending the packet up the > stack. Do you see non-tagged pktgen traffic at least? > > Ben > > > -- > Ben Greear <greearb@xxxxxxxxxxxxxxx> > Candela Technologies Inc http://www.candelatech.com > > > _______________________________________________ > Vlan mailing list > Vlan@xxxxxxxxxxxxxxx > http://www.candelatech.com/mailman/listinfo/vlan > _______________________________________________ Vlan mailing list Vlan@xxxxxxxxxxxxxxx http://www.candelatech.com/mailman/listinfo/vlan
