MRTG and Cisco

[Gilbert T. Gutierrez, Jr.]

Maybe some of you have seen this issue.  I have moved some equipment from 
some sub-interfaces on a cisco router to a Cisco Layer2/3 switch.  When I 
made this change MRTG is no longer reporting correctly for the VLANs.

I went from having for example, 100kbps of traffic when reporting on sub 
interface FastEthernet0/0.5 (Fa0/0.5:public at w.x.y.z) to 16bps of traffic 
when reporting on Vlan512 (Vl512:public at w.x.y.z).

I am using a cisco CAT3550EMI switch.  I would monitor the switch ports 
directly, but the ports are VLAN Trunked and connect to other Layer2 
switches.

Any guidance on the issue would be great.

Thank you,
Gilbert