[Bringing this back to the mailing list, since it's probably of general interest.]
NXM is an extension to OpenFlow using the Nicira vendor id space. I don't know of any open source controllers that speak it. Something very similar to it was added to OpenFlow 1.2 and is called OXM. In the OpenFlow 1.2 definition, arbitrary masks of source and destination MAC addresses are allowed. --Justin On Mar 13, 2012, at 3:10 PM, Ken Gray wrote: > To be clear, the nxm patch is non-OF, but nicera controller code talking > to ovs via an extension (or is it using an extension of OF wire protocol > to send the flow-mod)? If I'm non-nicera controller, I have to > adopt/emulate this function? > > On 3/13/12 10:39 PM, "Justin Pettit" <[email protected]> wrote: > >> Some masks for the destination MAC are supported. Heres the description >> from the ovs-ofctl man page: >> >> dl_dst=xx:xx:xx:xx:xx:xx/xx:xx:xx:xx:xx:xx >> Matches an Ethernet destination address specified as 6 >> pairs of >> hexadecimal digits delimited by colons (e.g. >> 00:0A:E4:25:6B:B0), >> with a wildcard mask following the slash. Only the >> following >> masks are allowed: >> >> 01:00:00:00:00:00 >> Match only the multicast bit. >> Thus, >> dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 matches >> all >> multicast (including broadcast) Ethernet packets, >> and >> dl_dst=00:00:00:00:00:00/01:00:00:00:00:00 matches >> all >> unicast Ethernet packets. >> >> fe:ff:ff:ff:ff:ff >> Match all bits except the multicast bit. This is >> proba? >> bly not useful. >> >> ff:ff:ff:ff:ff:ff >> Exact match (equivalent to omitting the mask). >> >> 00:00:00:00:00:00 >> Wildcard all bits (equivalent to dl_dst=*.) >> >> You can also do it through a controller if your controller supports NXM. >> That's defined in "include/openflow/nicira-ext.h" with the >> NXM_OF_ETH_DST_W match. >> >> --Justin >> >> >> On Mar 13, 2012, at 2:32 PM, Ken Gray wrote: >> >>> Does any version of ovswitch currently support masking/wildcarding a >>> MAC address in a flow. I know the implementation is currently OF 1.0 >>> and that is not supported in 1.0, but I wondered if it was supported >>> through any extension? >>> _______________________________________________ >>> discuss mailing list >>> [email protected] >>> http://openvswitch.org/mailman/listinfo/discuss >> > _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
