Hi I am running on my own nox module on a topology of 5 switches. I find two phenomena:
1, The byte number of every packet read from statistics is always 4 bytes larger than the real size. If pcap shows the packet is of size N, ./dpctl dump-flows will show a size of N+4. So, if we query statistics, it is also N+4. I want to know why there is a difference of 4? 2, I found that sometimes packets can also get redirected without an entry in flow table, or, the switch has a bug to show the correct flow table. When I tcpreplay from one host to another one, packets get redirected (tcpdump shows so), but ./dpctl dump-flows shows no entry. Even if the flow is so short to get counted as 0 size (first packet get lost), an entry should still exist. However, if I ping between these two hosts and then tcpreplay, the entries will show correctly. Is there any possible reason why flows get redirected but an entry is not there? Many thanks. _______________________________________________ nox-dev mailing list [email protected] http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
