printing number of bytes at a switch port

[Lakshmi Krishnaswamy]

Hello all,

Hope you all are doing well. I just wanted some help regarding printing out the number of bytes every second, received at a switch's port.

I am running simulations on a data center network, with leaf and spine switches - these are created using nodes (one NodeContainer for all leaves and one NodeContainer for all spines ), and there is a p2p channel installed between each leaf and spine node. There is a DropTailQueue of max.pkts = 10 set on these channels. 

In order to verify the network and if congestion is happening, I want to print out the number of bytes received by a switch's port every second. I am quite unclear of how to implement this print though. Any help, guidance or pointer to existing example or documentation would be highly appreciated. Thank you so much in advance! 

[Bhaskar Kataria]

Hi,

Maybe you can refer to the example available here  https://gitlab.com/nsnam/ns-3-dev/-/blob/master/src/traffic-control/examples/fqcodel-l4s-example.cc. 

https://gitlab.com/nsnam/ns-3-dev/-/blob/master/src/traffic-control/examples/fqcodel-l4s-example.cc#L344 here you can see that the bytes received/throughput at a particular node is measured every throughputSamplingInterval.

[lakshmik...@gmail.com]

Hi,

Thank you very much for this, this is really useful -  thank you so much once again!