Heh, after sending that msg, I did a little digging in the code  and doc and it seems clear that integer literals are just not supported as a value for the output action name.
I imagine that in order to handle that, that code section would need to be extended to perform a "parse_int_string(value,...)" and etc. All in all, I convinced myself that this is a FAD. One can easily load a literal integer into a REG and use that as output  anyways. So, that is plenty good. Thanks and sorry for the noise, -- flaviof : https://github.com/openvswitch/ovs/blob/a045e4b03d7603572ae0d503762c52dc40bf6f23/lib/learn.c#L371 : load:0x1->NXM_NX_REG1 ... output:NXM_NX_REG1 > On Apr 6, 2018, at 4:18 PM, Flavio Fernandes <fla...@flaviof.com> wrote: > > Dear OVS Gurus: > > I came across something simple and silly, which is making me think it is > actually a bug. > > In a nutshell, I'm trying to use a literal with the action output nested in a > learn(). > If I use a fancier (and more common) notation: > > output:NXM_OF_IN_PORT > > that works fine. However, if I try to use a literal such as: > > output:2 > > I get: > > ovs-ofctl: 2: unknown field `2' > > > Here is a set of steps I use from a sandbox session: > > $ ./boot.sh ; ./configure ; make -j4 ; \ > make sandbox > > $ ovs-vsctl add-br br0 \ > -- add-port br0 p1 -- set interface p1 ofport_request=1 \ > -- add-port br0 p2 -- set interface p2 ofport_request=2 \ > -- set Bridge br0 fail-mode=secure > > # this works just fine > $ ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, hard_timeout=600, \ > in_port=1, \ > NXM_OF_ETH_DST=NXM_OF_ETH_SRC, \ > output:NXM_OF_IN_PORT), \ > resubmit(,1)" > > $ ovs-ofctl add-flow br0 "table=1 priority=0 actions=flood" > > $ ovs-ofctl -OOpenFlow13 --names --no-stat dump-flows br0 > reset_counts > actions=learn(table=1,hard_timeout=600,in_port=p1,NXM_OF_ETH_DST=NXM_OF_ETH_SRC,output:NXM_OF_IN_PORT),resubmit(,1) > table=1, reset_counts priority=0 actions=FLOOD > > # very similar to the learn action done above, except I'm attempting to > hard code an output value > $ ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, hard_timeout=600, \ > in_port=2, \ > NXM_OF_ETH_DST=NXM_OF_ETH_SRC, \ > output:2), \ > resubmit(,1)" > ovs-ofctl: 2: unknown field `2' > > $ echo $? > 1 > > I also played a little bit with the parser test to reproduce this behavior. > See below. > > So... bug or FAD? If you think BUG, I can dig a little more to learn what is > going on. > It has been a while, so chances are that most of you will have this fixed > before I manage > to blink. :) > > Best, > > -- flaviof > > > > > $ make check TESTSUITEFLAGS=--list 2>/dev/null | grep -m1 -i learn > 454: learn.at:3 learning action - parsing and formatting > > > $ git diff > diff --git a/tests/learn.at b/tests/learn.at > index 5f1d6df..eaf1147 100644 > --- a/tests/learn.at > +++ b/tests/learn.at > @@ -7,6 +7,7 @@ actions=learn(send_flow_rem) > actions=learn(delete_learned) > actions=learn(send_flow_rem,delete_learned) > actions=learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST=NXM_OF_ETH_SRC, > output:NXM_OF_IN_PORT, load:10->NXM_NX_REG0[5..10]) > +actions=learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST=NXM_OF_ETH_SRC, > output:99) > actions=learn(table=1,idle_timeout=10, hard_timeout=20, fin_idle_timeout=5, > fin_hard_timeout=10, priority=10, cookie=0xfedcba9876543210, > in_port=99,eth_dst=eth_src,load:in_port->reg1[16..31]) > actions=learn(limit=4096) > actions=learn(limit=4096,result_dst=reg0) > > > $ make check TESTSUITEFLAGS='454' > ... > 454: learning action - parsing and formatting FAILED (learn.at:15)
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