MRTG and VLAN interfaces?

[2pat]

Hi, I'm graphing network traffic using MRTG. The graph showing the traffic on an physical interface (ie. int fa0/1) in the Catalyst 3550 shows up OK. But when I try to graph the traffic on an VLAN interface (ie. int vlan 3), the graph only shows some few kilobit of traffic, why? I know that the vlan carries Megabits of traffic.

[smahbub]

May be due to packet drops the traffic is so less. Is the result same at different intervals of time??

[2pat]

All the VLANs seems to have near to no traffic at all at all times, when graphed using MRTG. But the graph for the physical interface is "correct". And I know that one of the VLANs carry a lot of traffic.

[alexx8bits]

Hello, I know this is pretty old, but I see there is no solution, at least in this post. So, my problem is this, I have a switch with a interface vlan, when I see the counters of the interfaces it show 4611336 bits/sec, but in my MRTG web interface the traffic is absolute 0. How do I fix this? Is it my MRTG server or my switch?