Hi,I'm trying to use NXActionLearn in Ryu.1. I've succesfully created a flow 
mod with a learn action with match and load..With ovs-ofctl command I can also 
specify "load" actions to/from OVS registers.For exampleovs-ofctl add-flow s1 
-O OpenFlow13 "table=2 actions=learn(table=1, 
load:NXM_OF_IN_PORT[]->NXM_NX_REG0[0..15]) "

Does Ryu support OVS registers as source/destination fields in match/load?I'm 
interested in OpenFlow 1.3 but the only reference to registers I found is in 
ofproto_v1_0.py
def nxm_nx_reg(idx):    return nxm_header(0x0001, idx, 4)
def nxm_nx_reg_w(idx):    return nxm_header_w(0x0001, idx, 4)
2. How can I match on OVS registers value in a flow entry? What's the correct 
keyword to be put in OFPFlowMod()?
Thank you very much!RegardsDavide Sanvito
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