Maybe I will try to clarify my problem again. My setup is very simple. Using Mininet to configure this network. h1 (h1-eth0)----(s1-eth1)s1(s1-eth2)---(h1-eth0)h2.
I start the network using this command. sudo mn --switch ovsk --mac --custom ~/mininet/custom/LinkCustom.py --topo mytopo BTW, I try to use the following command to modify something. sudo ovs-ofctl -O OpenFlow13 add-flow s1 table=0,priority=65535,ip,in_port=1,dl_src=fe:81:d2:69:f6:74,dl_dst=de:dc:30:cd:6f:66,nw_src=10.0.0.1,nw_dst=10.0.0.2,nw_proto=0,nw_tos=0,actions=dec_ttl,mod_nw_dst:10.0.0.3,mod_dl_dst:00:00:00:00:00:11,output:2 And it did change the dst ip and dst mac. (I also use tcpdump command to monitor on the h2 side) However, dec_ttl still doesn't work. Can anybody help me out? --Allan On Mon, Feb 3, 2014 at 4:11 AM, Justin Pettit <jpet...@nicira.com> wrote: > I think you need to put the dec_ttl before the output action. > > --Justin > > > On 2/2/14, 6:08 AM, "Allan Jie" <allanmcgr...@gmail.com> wrote: > > >Dear all, > > > >I start a network like 4 host and 1 switches. > >h1,h2,h3,h4 and s1. > > > > > >I know the dec_ttl action is for ipv4 packet and openflow 1.1+. > > > > > >So I have finished this command. > >ovs-vsctl set bridge s1 protocols=OpenFlow10,OpenFlow12,OpenFlow13 > > > >And also use -O OpenFlow13 in ovs-ofctl. > >Like the following line: > >ovs-ofctl -O OpenFlow13 add-flow s1 > >table=0,priority=65535,ip,in_port=1,vlan_tci=0x0000,dl_src=9e:60:7c:45:f2: > >b8,dl_dst=32:a2:19:d3:56:4f,nw_src=10.0.0.1,nw_dst=10.0.0.2,nw_proto=0,nw_ > >tos=0,actions=output:2,dec_ttl > > > > > >Then in h1, I use the command > >h1 sendip -d dsf -p ipv4 -is 10.0.0.1 -id 10.0.0.2 10.0.0.2 > >which will send an "ip packet" from h1 to h2. > > > >And then in h2, I use this command to listen the port. > >tcpdump ip host 10.0.0.1 -v > > > > > > > >But the result is I cannot see any changes of the ttl in the received > >packet. The ttl value is still 64. > > > > > >How can I change that? Please help. > > > >Thank you. > >Allan > > > > > > > >-- > >Research student, final-year undergraduateExtreme Scale Network Computing > >and service > >laboratory(http://www.cloud-uestc.cn/cloud-uestc-EN/index.html), > >School of Computer Science & Engineering, > >University of Electronic Science and Technology of > >China(http://www.oice.uestc.edu.cn/en/). > >Website: http://www.allanjie.ml/ > > > > > > > >_______________________________________________ > >discuss mailing list > >discuss@openvswitch.org > >http://openvswitch.org/mailman/listinfo/discuss > > > -- Research student, final-year undergraduate Extreme Scale Network Computing and service laboratory( http://www.cloud-uestc.cn/cloud-uestc-EN/index.html), School of Computer Science & Engineering, University of Electronic Science and Technology of China( http://www.oice.uestc.edu.cn/en/). Website: http://www.allanjie.ml/
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