Hi Marko,
Well, the OpenFlow Spec does not clarify though...
In general, status value 0 means "up", no status flag is set = normal state.
Thanks,
Iwase
On 2018年01月26日 20:35, Marko Eremija wrote:
Hello Iwase,
I might have sent the previous mail a bit too quick. :) I have now implemented
the EventOFPPortStatus, but what I don't understand now is how to map status to
the OpenFlow message. There is this definition in ofproto.py:
# enum ofp_port_state
OFPPS_LINK_DOWN = 1 << 0 # No physical link present.
OFPPS_BLOCKED = 1 << 1 # Port is blocked.
OFPPS_LIVE = 1 << 2 # Live for Fast Failover Group.
But, when I am testing using Mininet, the output displays status values 0 (when
link is up) and 1 (when link is down). So, basically, status value of 0 means
that link is up?
I guess that other two OpenFlow messages are reserved for other use cases.
Best regards,
Marko
-----Original Message-----
From: Marko Eremija [mailto:marko.erem...@amres.ac.rs]
Sent: Friday, January 26, 2018 9:28 AM
To: ryu-devel@lists.sourceforge.net
Subject: Re: [Ryu-devel] Link status
Hello Iwase,
Thank you for your reply. I am already using this for port status, but is there
a way to extract the OFPPS_LINK_DOWN message, or to somehow map between the
port status messages and link status messages, like if the message is
OFPPR_DELETE it is the same as OFPPS_LINK_DOWN? Or to be more precise, how to
use OFPPort class to extract information about link status?
Best regards,
Marko
-----Original Message-----
From: Iwase Yusuke [mailto:iwase.yusu...@gmail.com]
Sent: Friday, January 26, 2018 1:28 AM
To: marko.erem...@amres.ac.rs
Cc: ryu-devel@lists.sourceforge.net
Subject: Re: [Ryu-devel] Link status
Hi Marko,
How about the following?
http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#port-status-message
You can use;
@set_ev_cls(ofp_event.EventOFPPortStatus, MAIN_DISPATCHER) to detect link
state changes.
Thanks,
Iwase
On 2018年01月26日 05:48, Marko Eremija wrote:
Hello,
I am trying to write a Ryu app that will be able to get link status. I
would like to find a way to notify the controller about the reason why
link is down (e.g. by using OFPPS_LINK_DOWN message), and trigger
actions if that is the case. If I understand correctly, I cannot use
the Port class from ofproto_v1_3_parser.py to get the link status, like this
e.g.:
@set_ev_cls(ofp_event.EventOFPPSLinkDown, [MAIN_DISPATCHER])
If someone would just tell me where to find this information, that
would be much appreciated.
Best regards,
Marko
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