Hi,
I think that the curl command has two mistakes as follows.
1) syntax error
Please correct commands as follows.
before:
> "actions":[
> {
> "type":"OUTPUT",
> "port": 4,
> "type":"DEC_NW_TTL"
> }
after:
"actions":[
{"type":"DEC_NW_TTL"},
{"type":"OUTPUT","port":4}
]
FYI, how to use "stats/flowentry/add" is described in following document.
http://ryu.readthedocs.org/en/latest/app/ofctl_rest.html#add-a-flow-entry
2) Error in match
"6.4 Flow Table Modification Messages" of OF1.3.4spec says:
set TTL action with a match wildcarding the Ethertype,
the switch may optionally reject the flow mod and immediately return
an ofp_error_msg with OFPET_BAD_ACTION type and
OFPBAC_MATCH_INCONSISTENT code.
For example, following curl command works fine in my environment.
curl -X POST -d '{
"dpid": 1,
"cookie": 1,
"cookie_mask": 1,
"table_id": 0,
"idle_timeout": 3600,
"hard_timeout": 3600,
"priority": 0,
"flags": 1,
"match":{
"in_port": 1,
"eth_type": 2048
},
"actions":[
{"type":"DEC_NW_TTL"},
{"type":"OUTPUT","port":4}
]
}' http://localhost:8080/stats/flowentry/add
thanks,
On 2015年10月24日 05:16, Andre Schütze wrote:
> Hello ryu-devel-mailinglist,
>
> I use Mininet with a custom topology and the RYU-REST controller
> "ofctl-rest.py". After installing some flowentries in the switches,
> sending some packets over the network and capturing traffic I recognize
> that the switches do not decrease the ttl - field in the ip - layer. I
> figure out that i have to tell the switches to decrease the ttl field
> (this is possible since OpenFlow - version 1.1). To do so I try the line
> "type": "DEC_NW_TTL", but it does not work. My compleate command look
> like this:
>
> curl -X POST -d '{
> "dpid": 1,
> "cookie": 1,
> "cookie_mask": 1,
> "table_id": 0,
> "idle_timeout": 3600,
> "hard_timeout": 3600,
> "priority": 0,
> "flags": 1,
> "match":{
> "in_port": 1
> },
> "actions":[
> {
> "type":"OUTPUT",
> "port": 4,
> "type":"DEC_NW_TTL"
> }
> ]
> }' http://localhost:8080/stats/flowentry/add
>
> What do I wrong? How do I have to modify the comand to let the switch
> reduce ttl? Please help me.
> Thank you in advance.
>
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