Hi Ben,
The two issues I raised (stats request/reply and feature request/reply) were
found when we were evaluating the switch's response in case the controller
behave indifferently.
Our objective is to make OVS more robust and respond with an error
(OFPBRC_BAD_VERSION) in the cases of 'OFPET_BAD_REQUEST' error type as
mentioned in spec (1.0):
-------------------------------------------
For the OFPET_BAD_REQUEST error type, the following codes are currently de-
fined:
/* ofp_error_msg 'code' values for OFPET_BAD_REQUEST. 'data' contains at least
* the first 64 bytes of the failed request. */
enum ofp_bad_request_code {
OFPBRC_BAD_VERSION, /* ofp_header.version not supported. */
----------
----------
};
------------------------------------------
Regards,
Varun
-----Original Message-----
From: Ben Pfaff [mailto:[email protected]]
Sent: Monday, May 21, 2012 10:04 PM
To: Varun Gupta
Cc: [email protected]
Subject: Re: [ovs-discuss] OpenVSwitch - "OFPBRC_BAD_VERSION" error packet not
received when there is version mismatch between stats request and stats reply
On Mon, May 21, 2012 at 10:50:19AM +0000, Varun Gupta wrote:
> Switch is not notifying the controller for OFPBRC_BAD_VERSION, /*
> ofp_header.version not supported. */ when there is version mismatch
> between stats request and stats reply. The switch was resetting the
> connection and only a warning message was generated on switch in log
> (/var/log/messages) before resetting connection.
It's hard for me to consider this a serious bug, because it's a bug
in the controller to send an OpenFlow message of a version that was
not negotiated in the OpenFlow version negotiation. I don't know why
you'd do that.
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