"Main issue is that does not show any activities.... "
That is what it looks like to me as well which is really odd..
What does say
systat -ifstat 5
show you for your interfaces traffic? What about say something like
[2.4.2-RELEASE][root@sg4860.local.lan]/root: netstat -i -b -n -I igb2
Name Mtu Network Address Ipkts Ierrs Idrop Ibytes Opkts Oerrs Obytes Coll
igb2 1500 <Link#3> 00:08:a2:0c:e6:20 243692313 0 0 33829938506 166012308 0 220759170807 0
igb2 - fe80::%igb2/6 fe80::208:a2ff:fe 0 - - 0 1 - 116 -
igb2 - 192.168.2.0/2 192.168.2.253 95013 - - 13184546 48803 - 10963069 -
[2.4.2-RELEASE][root@sg4860.local.lan]/root:
You can call up a specific vlan with say
[2.4.2-RELEASE][root@sg4860.local.lan]/root: netstat -i -b -n -I igb2.5
Name Mtu Network Address Ipkts Ierrs Idrop Ibytes Opkts Oerrs Obytes Coll
igb2. 1500 <Link#12> 00:08:a2:0c:e6:20 667311 0 0 40451516 4895 0 809821 0
igb2. - fe80::%igb2.5 fe80::208:a2ff:fe 0 - - 0 2 - 172 -
igb2. - 192.168.5.0/2 192.168.5.253 42 - - 20976 133 - 13931 -
[2.4.2-RELEASE][root@sg4860.local.lan]/root: