[ovs-dev] Openflow ofp 1.o wireshark plugin

Ben Pfaff blp at nicira.com
Tue Sep 10 04:12:26 UTC 2013


On Tue, Sep 10, 2013 at 08:09:04AM +0400, Vasiliy Tolstov wrote:
> 2013/9/10 Ben Pfaff <blp at nicira.com>:
> > No version of Open vSwitch ever generates or modifies DHCP messages.
> 
> Hmm. I'm find some dissector that support 0openflow 1.0.
> This is openflow message that send to controoller.
> As You can see it does not have option bytes. Last valid bytes is
> 52 54 00 5c cd 3a that contains mac address of network card
> (http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
> CHADDR (Client Hardware Address))
> But magic cookie and option bytes absent.
> Why ?

No version of Open vSwitch ever generates or modifies DHCP messages.  If
Open vSwitch sends a DHCP message to the controller in a packet-in, and
the packet-in does not show a magic cookie or option bytes, then it is
because, when Open vSwitch received the DHCP message, it did not have a
magic cookie or option bytes.

I can't speak for other OpenFlow implementations.



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