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.
- I am sniffing with tcpdump on both sides (src and dest) and cannot
catch VLAN traffic.
- I tried sniffing in various ways , like by "tcpdump -f vlan" and
"tcpdump -f vlan and net 192.168.0.0" and "tcpdump -f vlan and udp
port 9" and many other ways . on both sides,
(192.168.0.10 and the source machine , where pktgen runs) but I could
not catch any VLAN frames.
The script I am using for pktgen is this:
function pgset() {
local result
echo $1 > $PGDEV
result=`cat $PGDEV | fgrep "Result: OK:"`
if [ "$result" = "" ]; then
cat $PGDEV | fgrep Result:
fi
}
function pg() {
echo inject > $PGDEV
cat $PGDEV
}
echo "Adding devices to run".
PGDEV=/proc/net/pktgen/kpktgend_0
pgset "rem_device_all"
pgset "add_device eth0"
pgset "max_before_softirq 10"
PGDEV=/proc/net/pktgen/eth0
pgset "clone_skb 10"
pgset "min_pkt_size 64"
pgset "max_pkt_size 64"
pgset "dst 192.168.0.10"
pgset "dst_mac 00:0D:60:9A:26:D2"
pgset "count 10"
pgset "vlan_id 45" #set VLAN ID 0-4095
# Next dev
# Time to run
pgset "start"
echo "Done"
more details:
MY nic is 8139 RealTek (RTL).
tcpdump -vv -i eth0 vlan and host 192.168.0.10
whereas 192.168.0.10 is the destination.
I also sniff thus: tcpdump -vv -i eth0 vlan
And again - nothing in both these two filters.
Any ideas ?
Does anyone have any experience with tcpdump and pktgen ?
BTW, I wrote a small module which checks the features member of the
8139 RTL net device I use.
(see: include/linux/netdevice.h in the kernel tree).
I found out the followoing :
NETIF_F_VLAN_CHALLENGED is not set => VLANs is supported
NETIF_F_HW_VLAN_RX is NOT set => no HW VLAN RX acceleration
NETIF_F_HW_VLAN_TX is NOT set => no HW VLAN TX acceleration
vlan_rx_register is NULL.
Does this shed more light on my question and gives any hints ?
Regards,
Ian
_______________________________________________
Vlan mailing list
Vlan@xxxxxxxxxxxxxxx
http://www.candelatech.com/mailman/listinfo/vlan
