HELP: Traffic data Location

[Zhang Peng <pgzhang () bupt edu cn>]

Hi,
 
I would like to ask where I can find the database in which recording the
traffic data in the real network (e.g., Lan or Wan, VBR video etc.) I am
doing some simulation study based on the emperical data which is greatly
important for my research on traffic modeling. I have read some papers from
BellLab, MIT and IBM, however I am not sure the detailed location and
I can download with the anonymous user. Anyone can help me?

Thanks,
Zhang Peng