What happens if you use a value greater than three? OpenFlow's a little ugly with regards to handling DSCP versus ECN in TOS. I think what you're programming seems reasonable (according to OpenFlow 1.0, it should be shifted over by two bits to skip ECN), but it's possible that there's a bug. What happens if you program a value of four?
--Justin On Dec 8, 2013, at 11:16 PM, Sameer Katti <ska...@usc.edu> wrote: > Hi All, > > I am trying to set a flow that matches based on the nw_tos field of the match > object. But when I dump the flows on the switch it has nw_tos field set as 0. > I am using OpenvSwitch 1.10 on Mininet 2.0 > The code snippet I am using is:- > > msg = of.ofp_flow_mod() > #msg.match.dl_dst = packet.dst > msg.match.dl_type = ethernet.IP_TYPE > msg.match.nw_tos = 1; > > Even after installing a flow with such a match the nw_tos is still set to > zero. > > *** s1 > ------------------------------------------------------------------------ > NXST_FLOW reply (xid=0x4): > cookie=0x0, duration=13.677s, table=0, n_packets=1, n_bytes=98, idle_age=12, > ip,dl_dst=d2:35:53:03:83:bc,nw_tos=0 actions=output:1 > cookie=0x0, duration=6.652s, table=0, n_packets=3, n_bytes=294, idle_age=3, > ip,dl_dst=da:79:78:e1:7c:4f,nw_tos=0 actions=output:2 > > > How should I set the nw_tos field in ofp_match object? > > -- > -Sameer > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
