Hi, I believe maintaining the wildcards would be enough. To me, the following two matches are the same:
Wildcards = ALL - DL_TYPE, DL_TYPE = 5, IP_SRC = 100... Wildcards = ALL - DL_TYPE, DL_TYPE = 5, IP_SRC = 0... I believe Ben and Justin is saying that it is reasonable to maintain the wildcard field. Seems like we have a working solution? I will post this on the openflow-spec list for the words to be cleared up. The priority field worries me a little more, such I think exact match is normalized to priority 65535? Should that be maintained in flow_removed? I wonder. Regards KK On 21 February 2011 09:30, Ben Pfaff <b...@nicira.com> wrote: > On Sun, Feb 20, 2011 at 11:36 PM, Derek Cormier > <derek.corm...@lab.ntt.co.jp> wrote: >> I see what you mean and I agree that a switch shouldn't store unnecessary >> information. But is it really a burden in this case? The wildcards are >> stored in a single 32-bit integer, so no extra space is needed. > > The data structure that OVS uses for classification requires that > wildcarded fields > be zeroed for efficiency reasons. In other words, storing the wildcards > isn't a > big deal, but storing nonzero values of wildcarded fields would require extra > memory. So I'd rather not do it, although certainly it's not a huge > deal if in the > OVS has to. > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss_openvswitch.org > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss_openvswitch.org
