[ovs-discuss] The action "dec_ttl" doesn't work

[Allan Jie]

>From my last problem. My environment is the following setup.

Mininet 2.1 and openvswitch 1.10

Thank you


On Sun, Feb 2, 2014 at 10:08 PM, Allan Jie <allanmcgrady at 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 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/
>



-- 
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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