On Wed, May 29, 2019 at 08:26:12PM +0800, ychen wrote: > hi, > when I send IP packets with ttl in IP header is random in range(1-255), > and with all other IP header fields stay not changed > but generated 255 datapath flows each with different ttl value. > of course, i use the action dec_ttl, here is code: > case OFPACT_DEC_TTL: > wc->masks.nw_ttl = 0xff; > > > my question is: can we optimize the dec_ttl action? only differentiate > TTL>1 and TTL <=1? > as we all know, when TTL=0, we should send packet to the controller, and > let it make decision whether we should send icmp error packet out. > when TTL is larger than 1, I think they are no difference, am i right?
This optimization is not too valuable, because in practice IP packets don't have random TTLs. _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
