A register, such as NXM_NX_REG0[], is one reasonable choice. You can use "resubmit" along with a special OpenFlow table to map this value to a destination.
On Mon, Mar 19, 2012 at 03:29:21PM -0700, Masoud Moshref Javadi wrote: > Hum, thanks I have not read that in detail. > OK, still I have question: We store the output of multipath > algorithm in a field defined there, but which field should we use? > how the value of this field relates to the routing to the destination? > > On 3/19/2012 3:11 PM, Ben Pfaff wrote: > >Did you read nicira-ext.h? > > > >On Mon, Mar 19, 2012 at 03:08:37PM -0700, Masoud Moshref Javadi wrote: > >>I just want an example that fills the action part in the following rule: > >>ovs-ofctl add-flow br0 nw_src=10.0.0.1/32,nw_dst=10.0.0.1/32,action=? > >> > >>The manual page says: > >> > >> multipath(fields, basis, algorithm, n_links, arg, dst[start..end]) > >> > >> Hashes fields using basis as a universal hash parameter, then the > >> applies multipath link selection algorithm (with parameter arg) to > >> choose one of n_links output links numbered 0 through n_links minus > >> 1, and stores the link into dst[start..end], which must be an NXM > >> field as described above. > >> > >> Currently, fields must be either eth_src or symmetric_l4 and > >> algorithm must be one of modulo_n, hash_threshold, hrw, and > >> iter_hash. Only the iter_hash algorithm uses arg. > >> > >>"one of n_links output links numbered 0 through n_links minus 1", > >>which links? Does it mean all ports? If yes, then what if it is the > >>wrong port that does not lead to the destination? If the algorithm > >>keeps track of the correct links that will lead to the destination > >>what is the use of this parameter? > >>What is dst[start..end]? would you give an example? > >>what is *symmetric_l4?* there is no definition for it in this manual? > >> > >>On 3/19/2012 2:56 PM, Ben Pfaff wrote: > >>>On Sat, Mar 17, 2012 at 10:41:05AM -0700, Masoud Moshref Javadi wrote: > >>>>Would anyone give an example for a multipath action in openvswitch? How > >>>>does the rule look like in ovs-ofctl command? What are the per-requisites? > >>>It's all documented. Which part is troublesomee? > >>> > >>>Thanks, > >>> > >>>Ben. > _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
