Dear Murphy!
That section on the POX manual was a bit helpful. But what I am trying to do is
to check ports states of other switches from within the PacketIn event handler
of one switch. For that I need to access the "state" flag of "ofp.desc"
attribute of the PortStatus events of different switches from within the
PacketIn event handler of one switch.
The manual shows how to get the connection objects by DPIDs but it does not
show how to access attributes of a specific event (PortStatus event here) from
those connection objects. So how to do that?
Regards,Rizwan Jamil
From: u_r_wel...@hotmail.com
To: murphy.mccau...@gmail.com
Date: Mon, 24 Feb 2014 06:42:06 +0000
CC: pox-dev@lists.noxrepo.org
Subject: Re: [pox-dev] How to Access Other Switches from Event Handler of A
Switch
Thanks.
Subject: Re: [pox-dev] How to Access Other Switches from Event Handler of A
Switch
From: murphy.mccau...@gmail.com
Date: Sun, 23 Feb 2014 13:21:05 -0800
CC: pox-dev@lists.noxrepo.org
To: u_r_wel...@hotmail.com
The section "Communicating with a Datapath (Switch)" in the manual may be
useful to you.
-- Murphy
On Feb 22, 2014, at 11:33 PM, Rizwan Jamil <u_r_wel...@hotmail.com> wrote:Dear
All !
My question is regarding the controller: that how can I access the parameters
of other switches of a network FROM WITHIN the event handler of one of the
switches of that same network?
For example, I require to delete all flows in all switches in a network
whenever any port of any one of the switches goes down. So I think I would have
to access the flow tables of other switches from within the event handler
(Ports Status) of the switch which has triggered the removal/deletion of one of
its ports. But is it possible to do? How?
Another example is that, in a ring-protected network, I want to install the
flow in a switch for the shorter of the two paths with the help of an
algorithm. But while handling the packet_in event and before installing the
flow for the shorter path, I also require to make a check that whether or not
the ports of all switches upto the destination switch are up. If up, then
install that flow (for the shorter path), otherwise install the flow for the
other i.e. longer path. So it is possible to read the ports states of other
switches from within the packet_in handler of one of the switches which is
asking for a flow to the destination?
Please help!
