Thank you so much! That helps a lot! 2012/11/21 Murphy McCauley <[email protected]>
> On Nov 21, 2012, at 12:37 PM, Liyuan Wang wrote: > > print "install flow for switch1" > msg.command = of.OFPFC_ADD > # msg.hard_timeout = LIFE > msg.flags = of.OFPFF_SEND_FLOW_REM > msg.match.in_port=packet_in.in_port > *msg.match.dl_type = packet.type * > > *With the above line, I got entries like:* > > *<image.png> > * > > *I want the above two entries to be in one entry.* > > I think it's foggy in the OpenFlow 1.0 specification, but my understanding > is that the "accepted" reading (and the one used by Open vSwitch) is that > you can't specify IP addresses without specifying a specific ethertype that > uses IP addresses. Which is to say that what you want simply can't be > done. Instead, you need to install two flows. If you're doing this to > gather statistics and you want them together, you'll have to merge the two > on the controller when you get the stats replies back (identify ones with > matching IP ranges and sum the counters or whatever). If you're doing this > because you don't want to suffer the latency for installing a flow for ARP > and then having to wait another round trip to the controller to install one > for IP, you can just install them both at the same time. If you want to do > this to save table entries, I think you're out of luck. > > msg.wildcards = > of.OFPFW_NW_DST_SHIFT#+of.OFPFW_DL_TYPE+of.OFPFW_NW_PROTO > > I should make this clearer in the docs, I guess, but you should pretty > much never set wildcards manually in POX. I don't even know what the above > line will do. Delete it. > > > - *I'm not quite sure what kind of switch I'm using. I'm using mininet > to generate the network by typing: sudo mn --custom > ~/mininet/custom/example.py --topo mytopo* > > Okay, knowing that you're using Mininet from the tutorial is enough. > > > - *Where can I see the version of POX? I just downloaded it according > to the instructions on Openflow tutorial.* > > Again, that's enough to be helpful. > > > -- Murphy > >
