Hi,

On 2015年01月26日 20:34, MD.Badruzzaman Shakib wrote:
> Hello everyone,
> 
> I am a newbie in RYU development and also in python. I want my controller to 
> rediscover the network topology after a link failure occurs and dump this new 
> topology to a file. 
> 
> Can anyone please tell me where the topology is dumped by dumper.py?

Following is one example of how we can use dumper.py for debugging.

$ ryu-manager --verbose --observe-links --log-dir ./MY_LOG ryu.topology.dumper 
ryu.topology.switches

note:
  --verbose             show debug output
  --log-dir LOG_DIR     log file directory
  --observe-links       observe link discovery events.

$ ls MY_LOG/
ryu-manager.log

Just for your information, you will be able to know the Ryu options command of 
when you run the following command.

$ ryu-manager --help

> 
> Best regards
> Sakib
> 
> 
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leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
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