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ovn-tutorial: Update expected output from show commands
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Highlighted requirement on how a fresh sandbox is expected
before doing each of the tutorial sections.

Also added some mentioning of the gdb flags available for
debugging ovn programs.

Signed-off-by: Flavio Fernandes <[email protected]>
Signed-off-by: Russell Bryant <[email protected]>
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@flavio-fernandes @russellb
flavio-fernandes authored and russellb committed Apr 15, 2016
1 parent 28b4f69 commit b3ecab7
Showing 1 changed file with 121 additions and 50 deletions.
171 changes: 121 additions & 50 deletions tutorial/OVN-Tutorial.md
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,19 @@ environment:
including [vtep-ctl(8)], [ovn-nbctl(8)], and [ovn-sbctl(8)].

Note that each of these demos assumes you start with a fresh sandbox
environment. Re-run `ovs-sandbox` before starting each section.
environment. **Re-run `ovs-sandbox` before starting each section.**

Using GDB
---------

GDB support is not required to go through the tutorial. See the “Using GDB”
section of [Tutorial.md] for more info. Additional flags exist for launching
the debugger for the OVN programs:

--gdb-ovn-northd
--gdb-ovn-controller
--gdb-ovn-controller-vtep


1) Simple two-port setup
------------------------
Expand Down Expand Up @@ -78,19 +90,31 @@ show the logical flows.

$ ovn-sbctl lflow-list
Datapath: d3466847-2b3a-4f17-8eb2-34f5b0727a70 Pipeline: ingress
table=0(port_sec), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(port_sec), priority= 100, match=(vlan.present), action=(drop;)
table=0(port_sec), priority= 50, match=(inport == "sw0-port1" && eth.src == {00:00:00:00:00:01}), action=(next;)
table=0(port_sec), priority= 50, match=(inport == "sw0-port2" && eth.src == {00:00:00:00:00:02}), action=(next;)
table=1( acl), priority= 0, match=(1), action=(next;)
table=2( l2_lkup), priority= 100, match=(eth.dst[40]), action=(outport = "_MC_flood"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:01), action=(outport = "sw0-port1"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:02), action=(outport = "sw0-port2"; output;)
table=0(ls_in_port_sec_l2), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 100, match=(vlan.present), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw0-port1" && eth.src == {00:00:00:00:00:01}), action=(next;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw0-port2" && eth.src == {00:00:00:00:00:02}), action=(next;)
table=1(ls_in_port_sec_ip), priority= 0, match=(1), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port1" && eth.src == 00:00:00:00:00:01 && arp.sha == 00:00:00:00:00:01), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port1" && eth.src == 00:00:00:00:00:01 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:01) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:01)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port2" && eth.src == 00:00:00:00:00:02 && arp.sha == 00:00:00:00:00:02), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port2" && eth.src == 00:00:00:00:00:02 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:02) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:02)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw0-port1" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw0-port2" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 0, match=(1), action=(next;)
table=3( ls_in_pre_acl), priority= 0, match=(1), action=(next;)
table=4( ls_in_acl), priority= 0, match=(1), action=(next;)
table=5( ls_in_arp_rsp), priority= 0, match=(1), action=(next;)
table=6( ls_in_l2_lkup), priority= 100, match=(eth.mcast), action=(outport = "_MC_flood"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:01), action=(outport = "sw0-port1"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:02), action=(outport = "sw0-port2"; output;)
Datapath: d3466847-2b3a-4f17-8eb2-34f5b0727a70 Pipeline: egress
table=0( acl), priority= 0, match=(1), action=(next;)
table=1(port_sec), priority= 100, match=(eth.dst[40]), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw0-port1" && eth.dst == {00:00:00:00:00:01}), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw0-port2" && eth.dst == {00:00:00:00:00:02}), action=(output;)
table=0( ls_out_pre_acl), priority= 0, match=(1), action=(next;)
table=1( ls_out_acl), priority= 0, match=(1), action=(next;)
table=2(ls_out_port_sec_ip), priority= 0, match=(1), action=(next;)
table=3(ls_out_port_sec_l2), priority= 100, match=(eth.mcast), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw0-port1" && eth.dst == {00:00:00:00:00:01}), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw0-port2" && eth.dst == {00:00:00:00:00:02}), action=(output;)

Now we can start taking a closer look at how `ovn-controller` has programmed the
local switch. Before looking at the flows, we can use `ovs-ofctl` to verify the
Expand Down Expand Up @@ -123,27 +147,49 @@ fields have been omitted for brevity.

$ ovs-ofctl -O OpenFlow13 dump-flows br-int
OFPST_FLOW reply (OF1.3) (xid=0x2):
table=0, priority=100,in_port=1 actions=set_field:0x1->metadata,set_field:0x1->reg6,resubmit(,16)
table=0, priority=100,in_port=2 actions=set_field:0x1->metadata,set_field:0x2->reg6,resubmit(,16)
table=16, priority=100,metadata=0x1,dl_src=01:00:00:00:00:00/01:00:00:00:00:00 actions=drop
table=0, priority=100,in_port=1 actions=set_field:0x1->reg5,set_field:0x1->metadata,set_field:0x1->reg6,resubmit(,16)
table=0, priority=100,in_port=2 actions=set_field:0x2->reg5,set_field:0x1->metadata,set_field:0x2->reg6,resubmit(,16)
table=16, priority=100,metadata=0x1,vlan_tci=0x1000/0x1000 actions=drop
table=16, priority=100,metadata=0x1,dl_src=01:00:00:00:00:00/01:00:00:00:00:00 actions=drop
table=16, priority=50,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01 actions=resubmit(,17)
table=16, priority=50,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02 actions=resubmit(,17)
table=17, priority=0,metadata=0x1 actions=resubmit(,18)
table=18, priority=100,metadata=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=set_field:0xffff->reg7,resubmit(,32)
table=18, priority=50,metadata=0x1,dl_dst=00:00:00:00:00:01 actions=set_field:0x1->reg7,resubmit(,32)
table=18, priority=50,metadata=0x1,dl_dst=00:00:00:00:00:02 actions=set_field:0x2->reg7,resubmit(,32)
table=18, priority=90,icmp6,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02,icmp_type=136,icmp_code=0,nd_tll=00:00:00:00:00:00 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02,icmp_type=136,icmp_code=0,nd_tll=00:00:00:00:00:02 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01,icmp_type=136,icmp_code=0,nd_tll=00:00:00:00:00:00 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01,icmp_type=136,icmp_code=0,nd_tll=00:00:00:00:00:01 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01,icmp_type=135,icmp_code=0,nd_sll=00:00:00:00:00:01 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01,icmp_type=135,icmp_code=0,nd_sll=00:00:00:00:00:00 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02,icmp_type=135,icmp_code=0,nd_sll=00:00:00:00:00:00 actions=resubmit(,19)
table=18, priority=90,icmp6,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02,icmp_type=135,icmp_code=0,nd_sll=00:00:00:00:00:02 actions=resubmit(,19)
table=18, priority=90,arp,reg6=0x1,metadata=0x1,dl_src=00:00:00:00:00:01,arp_sha=00:00:00:00:00:01 actions=resubmit(,19)
table=18, priority=90,arp,reg6=0x2,metadata=0x1,dl_src=00:00:00:00:00:02,arp_sha=00:00:00:00:00:02 actions=resubmit(,19)
table=18, priority=80,icmp6,reg6=0x2,metadata=0x1,icmp_type=136,icmp_code=0 actions=drop
table=18, priority=80,icmp6,reg6=0x1,metadata=0x1,icmp_type=136,icmp_code=0 actions=drop
table=18, priority=80,icmp6,reg6=0x1,metadata=0x1,icmp_type=135,icmp_code=0 actions=drop
table=18, priority=80,icmp6,reg6=0x2,metadata=0x1,icmp_type=135,icmp_code=0 actions=drop
table=18, priority=80,arp,reg6=0x2,metadata=0x1 actions=drop
table=18, priority=80,arp,reg6=0x1,metadata=0x1 actions=drop
table=18, priority=0,metadata=0x1 actions=resubmit(,19)
table=19, priority=0,metadata=0x1 actions=resubmit(,20)
table=20, priority=0,metadata=0x1 actions=resubmit(,21)
table=21, priority=0,metadata=0x1 actions=resubmit(,22)
table=22, priority=100,metadata=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=set_field:0xffff->reg7,resubmit(,32)
table=22, priority=50,metadata=0x1,dl_dst=00:00:00:00:00:01 actions=set_field:0x1->reg7,resubmit(,32)
table=22, priority=50,metadata=0x1,dl_dst=00:00:00:00:00:02 actions=set_field:0x2->reg7,resubmit(,32)
table=32, priority=0 actions=resubmit(,33)
table=33, priority=100,reg7=0x1,metadata=0x1 actions=resubmit(,34)
table=33, priority=100,reg7=0xffff,metadata=0x1 actions=set_field:0x2->reg7,resubmit(,34),set_field:0x1->reg7,resubmit(,34)
table=33, priority=100,reg7=0x2,metadata=0x1 actions=resubmit(,34)
table=33, priority=100,reg7=0x1,metadata=0x1 actions=set_field:0x1->reg5,resubmit(,34)
table=33, priority=100,reg7=0xffff,metadata=0x1 actions=set_field:0x2->reg5,set_field:0x2->reg7,resubmit(,34),set_field:0x1->reg5,set_field:0x1->reg7,resubmit(,34),set_field:0xffff->reg7
table=33, priority=100,reg7=0x2,metadata=0x1 actions=set_field:0x2->reg5,resubmit(,34)
table=34, priority=100,reg6=0x1,reg7=0x1,metadata=0x1 actions=drop
table=34, priority=100,reg6=0x2,reg7=0x2,metadata=0x1 actions=drop
table=34, priority=0 actions=set_field:0->reg0,set_field:0->reg1,set_field:0->reg2,set_field:0->reg3,set_field:0->reg4,set_field:0->reg5,resubmit(,48)
table=34, priority=0 actions=set_field:0->reg0,set_field:0->reg1,set_field:0->reg2,set_field:0->reg3,set_field:0->reg4,resubmit(,48)
table=48, priority=0,metadata=0x1 actions=resubmit(,49)
table=49, priority=100,metadata=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,64)
table=49, priority=50,reg7=0x1,metadata=0x1,dl_dst=00:00:00:00:00:01 actions=resubmit(,64)
table=49, priority=50,reg7=0x2,metadata=0x1,dl_dst=00:00:00:00:00:02 actions=resubmit(,64)
table=49, priority=0,metadata=0x1 actions=resubmit(,50)
table=50, priority=0,metadata=0x1 actions=resubmit(,51)
table=51, priority=100,metadata=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,64)
table=51, priority=50,reg7=0x2,metadata=0x1,dl_dst=00:00:00:00:00:02 actions=resubmit(,64)
table=51, priority=50,reg7=0x1,metadata=0x1,dl_dst=00:00:00:00:00:01 actions=resubmit(,64)
table=64, priority=100,reg7=0x1,metadata=0x1 actions=output:1
table=64, priority=100,reg7=0x2,metadata=0x1 actions=output:2

Expand Down Expand Up @@ -217,33 +263,58 @@ OVN creates separate logical flows for each logical switch.

$ ovn-sbctl lflow-list
Datapath: 5aa8be0b-8369-49e2-a878-f68872a8d211 Pipeline: ingress
table=0(port_sec), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(port_sec), priority= 100, match=(vlan.present), action=(drop;)
table=0(port_sec), priority= 50, match=(inport == "sw0-port1" && eth.src == {00:00:00:00:00:01}), action=(next;)
table=0(port_sec), priority= 50, match=(inport == "sw0-port2" && eth.src == {00:00:00:00:00:02}), action=(next;)
table=1( acl), priority= 0, match=(1), action=(next;)
table=2( l2_lkup), priority= 100, match=(eth.dst[40]), action=(outport = "_MC_flood"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:01), action=(outport = "sw0-port1"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:02), action=(outport = "sw0-port2"; output;)
table=0(ls_in_port_sec_l2), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 100, match=(vlan.present), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw1-port1" && eth.src == {00:00:00:00:00:03}), action=(next;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw1-port2" && eth.src == {00:00:00:00:00:04}), action=(next;)
table=1(ls_in_port_sec_ip), priority= 0, match=(1), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw1-port1" && eth.src == 00:00:00:00:00:03 && arp.sha == 00:00:00:00:00:03), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw1-port1" && eth.src == 00:00:00:00:00:03 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:03) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:03)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw1-port2" && eth.src == 00:00:00:00:00:04 && arp.sha == 00:00:00:00:00:04), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw1-port2" && eth.src == 00:00:00:00:00:04 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:04) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:04)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw1-port1" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw1-port2" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 0, match=(1), action=(next;)
table=3( ls_in_pre_acl), priority= 0, match=(1), action=(next;)
table=4( ls_in_acl), priority= 0, match=(1), action=(next;)
table=5( ls_in_arp_rsp), priority= 0, match=(1), action=(next;)
table=6( ls_in_l2_lkup), priority= 100, match=(eth.mcast), action=(outport = "_MC_flood"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:03), action=(outport = "sw1-port1"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:04), action=(outport = "sw1-port2"; output;)
Datapath: 5aa8be0b-8369-49e2-a878-f68872a8d211 Pipeline: egress
table=0( acl), priority= 0, match=(1), action=(next;)
table=1(port_sec), priority= 100, match=(eth.dst[40]), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw0-port1" && eth.dst == {00:00:00:00:00:01}), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw0-port2" && eth.dst == {00:00:00:00:00:02}), action=(output;)
table=0( ls_out_pre_acl), priority= 0, match=(1), action=(next;)
table=1( ls_out_acl), priority= 0, match=(1), action=(next;)
table=2(ls_out_port_sec_ip), priority= 0, match=(1), action=(next;)
table=3(ls_out_port_sec_l2), priority= 100, match=(eth.mcast), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw1-port1" && eth.dst == {00:00:00:00:00:03}), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw1-port2" && eth.dst == {00:00:00:00:00:04}), action=(output;)
Datapath: 631fb3c9-b0a3-4e56-bac3-1717c8cbb826 Pipeline: ingress
table=0(port_sec), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(port_sec), priority= 100, match=(vlan.present), action=(drop;)
table=0(port_sec), priority= 50, match=(inport == "sw1-port1" && eth.src == {00:00:00:00:00:03}), action=(next;)
table=0(port_sec), priority= 50, match=(inport == "sw1-port2" && eth.src == {00:00:00:00:00:04}), action=(next;)
table=1( acl), priority= 0, match=(1), action=(next;)
table=2( l2_lkup), priority= 100, match=(eth.dst[40]), action=(outport = "_MC_flood"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:03), action=(outport = "sw1-port1"; output;)
table=2( l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:04), action=(outport = "sw1-port2"; output;)
table=0(ls_in_port_sec_l2), priority= 100, match=(eth.src[40]), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 100, match=(vlan.present), action=(drop;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw0-port1" && eth.src == {00:00:00:00:00:01}), action=(next;)
table=0(ls_in_port_sec_l2), priority= 50, match=(inport == "sw0-port2" && eth.src == {00:00:00:00:00:02}), action=(next;)
table=1(ls_in_port_sec_ip), priority= 0, match=(1), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port1" && eth.src == 00:00:00:00:00:01 && arp.sha == 00:00:00:00:00:01), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port1" && eth.src == 00:00:00:00:00:01 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:01) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:01)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port2" && eth.src == 00:00:00:00:00:02 && arp.sha == 00:00:00:00:00:02), action=(next;)
table=2(ls_in_port_sec_nd), priority= 90, match=(inport == "sw0-port2" && eth.src == 00:00:00:00:00:02 && ip6 && nd && ((nd.sll == 00:00:00:00:00:00 || nd.sll == 00:00:00:00:00:02) || ((nd.tll == 00:00:00:00:00:00 || nd.tll == 00:00:00:00:00:02)))), action=(next;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw0-port1" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 80, match=(inport == "sw0-port2" && (arp || nd)), action=(drop;)
table=2(ls_in_port_sec_nd), priority= 0, match=(1), action=(next;)
table=3( ls_in_pre_acl), priority= 0, match=(1), action=(next;)
table=4( ls_in_acl), priority= 0, match=(1), action=(next;)
table=5( ls_in_arp_rsp), priority= 0, match=(1), action=(next;)
table=6( ls_in_l2_lkup), priority= 100, match=(eth.mcast), action=(outport = "_MC_flood"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:01), action=(outport = "sw0-port1"; output;)
table=6( ls_in_l2_lkup), priority= 50, match=(eth.dst == 00:00:00:00:00:02), action=(outport = "sw0-port2"; output;)
Datapath: 631fb3c9-b0a3-4e56-bac3-1717c8cbb826 Pipeline: egress
table=0( acl), priority= 0, match=(1), action=(next;)
table=1(port_sec), priority= 100, match=(eth.dst[40]), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw1-port1" && eth.dst == {00:00:00:00:00:03}), action=(output;)
table=1(port_sec), priority= 50, match=(outport == "sw1-port2" && eth.dst == {00:00:00:00:00:04}), action=(output;)
table=0( ls_out_pre_acl), priority= 0, match=(1), action=(next;)
table=1( ls_out_acl), priority= 0, match=(1), action=(next;)
table=2(ls_out_port_sec_ip), priority= 0, match=(1), action=(next;)
table=3(ls_out_port_sec_l2), priority= 100, match=(eth.mcast), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw0-port1" && eth.dst == {00:00:00:00:00:01}), action=(output;)
table=3(ls_out_port_sec_l2), priority= 50, match=(outport == "sw0-port2" && eth.dst == {00:00:00:00:00:02}), action=(output;)


In this setup, `sw0-port1` and `sw0-port2` can send packets to each other, but
not to either of the ports on `sw1`. This first trace shows a packet from
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