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Hi Martin ( yes, great name )
I thought so, beacuse I guess that matching actions takes some resources.
But, as Rodrigo points out, there is this in the openflow spec:
struct ofp_flow_stats_request {
~ struct ofp_match match; /* Fields to match. */
~ uint8_t table_id; /* ID of table to read (from
ofp_table_stats)
~ or 0xff for all tables. */
~ uint8_t pad; /* Align to 32 bits. */
~ uint16_t out_port; /* Require matching entries to include this
~ as an output port. A value of
OFPP_NONE
~ indicates no restriction. */
};
That looks to me as if you should specify an ouport to filter.
I thought if this is in the spec, then nox would support it.
Correct me, if I am reading this wrong!
Kind regards
Martin
Martin Casado wrote:
| Hi Martin, (nice name btw ;)
|
| I don't believe that OpenFlow allows matching over actions.
Therefore, you cannot match over an output action.
|
| For future reference, the fields you can define for matching are
defined in src/nox/lib/core.py
| Hello!
|
| I would like to use the method fetch from the module python_flow_fetcher
| distributed with nox to fetch flows.
|
| It works fine, but I don't know the exact syntax for flow_stats_requests
| and cannot find find them.
|
| It says in the OpenFlow spec that you can request flows with the output
| port as a restriction.
| I would like to do that?
|
| How do I extend flow_stats_request = {'dpid':dpid,'match':{'in_port':1}}
| to only get flow that are sent out port number 2?
|
| Thank you very much!
| Martin
|>
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