[e2e] Extracting No. of packets or bytes in a router buffer

[V Anil Kumar]

We are searching for any known techniques to continuously sample (say at
every 100 msec interval) the buffer occupancy of router interfaces. The
requirement is to extract or estimate the instantaneous value of the
number of packets or bytes in the router buffer from another machine in
the network, and not the maximum possible router buffer size.

Any suggestion, advice or pointer to literature on this?

Thanks in advance.

Anil