(2013/03/13 23:57), [email protected] wrote:

> Thanks for your reply, I check the spec and now know the
> "OFPCR_ROLE_EQUAL" and "Master/Slave"
> I think my question is focus on Ryu controller, Our OpenFlow switch is
> OF 1.2 compatible...so my questions;
> 1. Ryu controller only support Master/Slave model? or ryu controllers
> can play equal role?

Ryu supports both. However, Ryu doesn't know what you want. IOW, you 
need to implement an application to set roles in a way that you want.

IIRC, this sample code uses Zookeeper to track liveness of controllers. 
When a controller is dead, the rest of controllers get notification. 
Then your application need to configure roles.

> 2. in Master/Slave mode...If master leave, then one of slaves become new
> master, what could be happen in OpenFlow switch? the new master insert
> flow tables start from scratch? old flow tables belong to old master
> will be deleted?

It's up to switch configuration, IIRC.




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