On Wed, Sep 09, 2015 at 10:47:14AM +0800, openvswitcher wrote:
> I wonder why the installed megaflow is the one bellow:
>
>
> > The installed megaflow i see is this:
> > Megaflow: recirc_id=0,ip,in_port=2,dl_dst=fa:16:3e:e2:16:63,nw_dst=
> > 0.0.0.0/2.0.0.0,nw_frag=no
> Can 'nw_dst=0.0.0.0/2.0.0.0' matches any flow of which the prefix is
> 'network address: xxxxxx0x.xxxxxxxx.xxxxxxxx.xxxxxxxx
> 'network mask: 00000010.00000000.00000000.00000000' ?
The OpenFlow flows in question are 10.0.0.0/24, which matches:
00001010.00000000.00000000.xxxxxxxx
and 10.0.0.1/32, which matches:
00001010.00000000.00000000.00000001
The packet matched against them contains 8.8.8.8, which has the value:
00001000.00001000.00001000.00001000
The megaflow match 0.0.0.0/2.0.0.0 checks for:
xxxx0xxx.xxxxxxxx.xxxxxxxx.xxxxxxxx
That makes sense because that single bit is sufficient to determine
that the packet does not match either of the former OpenFlow flows.
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