Hello Zubair,
Thank you for your reply. So if I understand it correct, controller waits for
specific LLDP sequence number for each link. When timeout of LLDP occurs for a
link, controller considers that the link is down and when it receives a LLDP
packet from a new link it consider that there is a link add.
As my final goal is to find the time required for detection of this event, can
I say that the detection time depends on the setting of frequency and hold time
of LLDP packet in mininet( as I am using mininet currently)? It will be great
if you could share some idea about how can I measure this time?
Thanks in advance.
RegardsSakib
On Tuesday, 26 May 2015, 21:07, Zubair Hafeez <[email protected]>
wrote:
#yiv7508151850 #yiv7508151850 --.yiv7508151850hmmessage
P{margin:0px;padding:0px;}#yiv7508151850
body.yiv7508151850hmmessage{font-size:12pt;font-family:Calibri;}#yiv7508151850
Hello Sakib,
Ryu uses LLDP to detect link failure/ add events. When the controller is
unable to receive the specified number of LLDP packets, these events are
generated.
Regards,Zubair
Date: Tue, 26 May 2015 18:43:06 +0000
From: [email protected]
To: [email protected]
Subject: Re: [Ryu-devel] How the Link delete events is detected?
Hello Iwase,
Thank you for your answer. I am extremely sorry that I asked you a different
question from the subject. As my mail bounced from the mailing list two times,
by mistake I copy pasted different question. My actual question was actually
about the mechanism ryu used to detect link failure/ add event. I used LinkAdd
and LinkDelete handler in my application as follows-
@set_ev_cls(EventLinkAdd, MAIN_DISPATCHER)
def _link_add_handler(self, ev):
@set_ev_cls(EventLinkDelete, MAIN_DISPATCHER)
def _link_del_handler(self, ev)
Now I want to evaluate the performance of this handlers in different link
condition(how much time requires to detect the event). Before that I need to
know actually how this handlers detect this events and how fast the controller
knows about this events after this events actually happened.
But unfortunately I was not able to find it. Can you please tell me how this
event are discovered by the decorator function?
Thanking youSakib
On Tuesday, 26 May 2015, 7:46, Yusuke Iwase <[email protected]>
wrote:
Hi Sakib,
On 2015年05月26日 02:28, MD.Badruzzaman Shakib wrote:
> Hello everyone,
>
> I want to get the port information from the link_add event. I couldn't find
> any getter function for port number.
> for the code below-
>
> @set_ev_cls(EventLinkAdd, MAIN_DISPATCHER)
> def _link_add_handler(self, ev):
> link = ev.link
> #print "type of links:", type(link)
> print link
>
> it prints-
> Link: Port<dpid=4, port_no=5, LIVE> to Port<dpid=6, port_no=3, LIVE>
>
> So now I am getting the source port_no by using
> src_port = int(str(link)[27:28])
You can get the port number from EventLinkAdd/EventLinkDelete as follow.
@set_ev_cls(EventLinkAdd, MAIN_DISPATCHER)
def _link_add_handler(self, ev):
link = ev.link
self.logger.info('link.src.port_no = %d', link.src.port_no)
# e.g.)
# link.src.port_no = 2
FYI,
'ev.link' is an instance of 'class Link' in ryu/topology/switches.py.
<https://github.com/osrg/ryu/blob/master/ryu/topology/switches.py#L135>
And 'ev.link.src/dst' is an instance of 'class Port'.
<https://github.com/osrg/ryu/blob/master/ryu/topology/switches.py#L57>
Thanks,
Iwase
>
> But I am interested to know is there any standard method to get the port
> number from the link_add/ link_delete event?
>
> Thanking you
> Sakib
>
------------------------------------------------------------------------------
One dashboard for servers and applications across Physical-Virtual-Cloud
Widest out-of-the-box monitoring support with 50+ applications
Performance metrics, stats and reports that give you Actionable Insights
Deep dive visibility with transaction tracing using APM Insight.
http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
_______________________________________________
Ryu-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/ryu-devel
------------------------------------------------------------------------------One
dashboard for servers and applications across Physical-Virtual-Cloud Widest
out-of-the-box monitoring support with 50+ applicationsPerformance metrics,
stats and reports that give you Actionable InsightsDeep dive visibility with
transaction tracing using APM
Insight.http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
_______________________________________________Ryu-devel mailing
[email protected]https://lists.sourceforge.net/lists/listinfo/ryu-devel
------------------------------------------------------------------------------
_______________________________________________
Ryu-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/ryu-devel
------------------------------------------------------------------------------
_______________________________________________
Ryu-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/ryu-devel
