Hello,
I noticed a big difference in the flow generated by northd between
releases 24.09 and 25.03
In the 25.03 northd fail to find similar routes and form ecmp group.
I append following information:
1. Testcase scenario that can be easily copy-pasted to ovn-ic.at
2. Test output if ran in 24.09
3. Test output if ran in 25.03
Could you please clarify is this real issue?
Thank you,
Alexander
=============== TEST =====================
OVN_FOR_EACH_NORTHD([
AT_SETUP([ovn-ic -- east-west - 2az])
ovn_init_ic_db
ovn-ic-nbctl ts-add rtb-1
ovn-ic-nbctl ts-add rtb-2
ovn_start az1
ovn_as az1
ovn_as az1 check ovn-ic-nbctl --wait=sb sync
ovn_as az1 check ovn-nbctl set nb_global . options:ic-route-learn=true
ovn_as az1 check ovn-nbctl set nb_global . options:ic-route-adv=true
ovn_as az1 check ovn-nbctl ls-add subnet-A
ovn_as az1 check ovn-nbctl lsp-add subnet-A subnet-A-up -- lsp-set-type
subnet-A-up router -- lsp-set-addresses subnet-A-up router --
lsp-set-options subnet-A-up router-port=subnet-A
ovn_as az1 check ovn-nbctl lsp-add subnet-A client -- lsp-set-addresses
client "0a:00:43:1e:92:20 172.31.0.4"
ovn_as az1 check ovn-nbctl lsp-add rtb-1 rtb-1-down1 -- lsp-set-type
rtb-1-down1 router -- lsp-set-addresses rtb-1-down1 router --
lsp-set-options rtb-1-down1 router-port=rtb-1
ovn_as az1 check ovn-nbctl lsp-add rtb-2 rtb-2-down1 -- lsp-set-type
rtb-2-down1 router -- lsp-set-addresses rtb-2-down1 router --
lsp-set-options rtb-2-down1 router-port=rtb-2
ovn_as az1 check ovn-nbctl lr-add vpc
ovn_as az1 check ovn-nbctl lrp-add vpc subnet-A "d0:fe:00:00:00:14"
"172.31.0.1/24" -- lrp-set-options subnet-A route_table=table1
ovn_as az1 check ovn-nbctl lrp-add vpc rtb-1 "00:00:a0:9e:9d:40"
"169.254.100.1/27" -- lrp-set-options rtb-1 route_table=table1
ovn_as az1 check ovn-nbctl lrp-add vpc rtb-2 "00:00:60:15:b8:20"
"169.254.100.33/27" -- lrp-set-options rtb-2 route_table=table2
ovn_start az2
ovn_as az2
ovn_as az2 check ovn-ic-nbctl --wait=sb sync
ovn_as az2 check ovn-nbctl set nb_global . options:ic-route-learn=true
ovn_as az2 check ovn-nbctl set nb_global . options:ic-route-adv=true
ovn_as az2 check ovn-nbctl ls-add subnet-D
ovn_as az2 check ovn-nbctl lsp-add subnet-D subnet-D-up -- lsp-set-type
subnet-D-up router -- lsp-set-addresses subnet-D-up router --
lsp-set-options subnet-D-up router-port=subnet-D
ovn_as az2 check ovn-nbctl lsp-add subnet-D filter2 -- lsp-set-addresses
filter2 "0a:01:39:eb:b1:41 172.31.3.4"
ovn_as az2 check ovn-nbctl lsp-add rtb-1 rtb-1-down2 -- lsp-set-type
rtb-1-down2 router -- lsp-set-addresses rtb-1-down2 router --
lsp-set-options rtb-1-down2 router-port=rtb-1
ovn_as az2 check ovn-nbctl lsp-add rtb-2 rtb-2-down2 -- lsp-set-type
rtb-2-down2 router -- lsp-set-addresses rtb-2-down2 router --
lsp-set-options rtb-2-down2 router-port=rtb-2
ovn_as az2 check ovn-nbctl lr-add vpc
ovn_as az2 check ovn-nbctl lrp-add vpc subnet-D "d0:fe:00:00:00:17"
"172.31.3.1/24" -- lrp-set-options subnet-D route_table=table2
ovn_as az2 check ovn-nbctl lrp-add vpc rtb-1 "00:01:a0:9e:9d:40"
"169.254.100.2/27" -- lrp-set-options rtb-1 route_table=table1
ovn_as az2 check ovn-nbctl lrp-add vpc rtb-2 "00:01:60:15:b8:20"
"169.254.100.34/27" -- lrp-set-options rtb-2 route_table=table2
check ovn-ic-nbctl --wait=sb sync
ovn_as az1 ovn-nbctl list logical_router_static
ovn_as az1 ovn-nbctl lr-route-list vpc
ovn_as az1 ovn-sbctl lflow-list vpc | grep lr_in_ip_routing
OVN_CLEANUP_IC([az1], [az2])
AT_CLEANUP
])
=============== CUT =====================
=============== OUTPUT 24.09.02 =====================
_uuid : ca00ec23-dbb7-4fe1-87ab-04765efa5d7f
bfd : []
external_ids :
{ic-learned-route="cde67ffc-bcfa-4470-bd8e-93ac59401344"}
ip_prefix : "172.31.3.1/24"
nexthop : "169.254.100.2"
options : {origin=connected}
output_port : []
policy : []
route_table : ""
_uuid : 421525df-80d0-4a92-ad8d-e00dde47d60d
bfd : []
external_ids :
{ic-learned-route="fa63cc12-5fdf-44df-9b07-e8006641d7b4"}
ip_prefix : "172.31.3.1/24"
nexthop : "169.254.100.34"
options : {origin=connected}
output_port : []
policy : []
route_table : ""
IPv4 Routes
Route Table <main>:
172.31.3.0/24 169.254.100.2 dst-ip (learned) ecmp
172.31.3.0/24 169.254.100.34 dst-ip (learned) ecmp
table=13(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"rtb-1"), action=(reg7 = 2; next;)
table=13(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"rtb-2"), action=(reg7 = 1; next;)
table=13(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"subnet-A"), action=(reg7 = 2; next;)
table=13(lr_in_ip_routing_pre), priority=0 , match=(1),
action=(reg7 = 0; next;)
table=14(lr_in_ip_routing ), priority=10550, match=(nd_rs ||
nd_ra), action=(drop;)
table=14(lr_in_ip_routing ), priority=194 , match=(inport ==
"rtb-1" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::200:a0ff:fe9e:9d40; eth.src =
00:00:a0:9e:9d:40; outport = "rtb-1"; flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=194 , match=(inport ==
"rtb-2" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::200:60ff:fe15:b820; eth.src =
00:00:60:15:b8:20; outport = "rtb-2"; flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=194 , match=(inport ==
"subnet-A" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::d2fe:ff:fe00:14; eth.src =
d0:fe:00:00:00:14; outport = "subnet-A"; flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=83 , match=(ip4.dst ==
169.254.100.0/27), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst;
reg1 = 169.254.100.1; eth.src = 00:00:a0:9e:9d:40; outport = "rtb-1";
flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=83 , match=(ip4.dst ==
169.254.100.32/27), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst;
reg1 = 169.254.100.33; eth.src = 00:00:60:15:b8:20; outport = "rtb-2";
flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=74 , match=(ip4.dst ==
172.31.0.0/24), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst; reg1
= 172.31.0.1; eth.src = d0:fe:00:00:00:14; outport = "subnet-A";
flags.loopback = 1; next;)
table=14(lr_in_ip_routing ), priority=74 , match=(ip4.dst ==
172.31.3.0/24), action=(ip.ttl--; flags.loopback = 1; reg8[0..15] = 1;
reg8[16..31] = select(1, 2);)
table=14(lr_in_ip_routing ), priority=0 , match=(1), action=(drop;)
table=15(lr_in_ip_routing_ecmp), priority=150 , match=(reg8[0..15]
== 0), action=(next;)
table=15(lr_in_ip_routing_ecmp), priority=100 , match=(reg8[0..15]
== 1 && reg8[16..31] == 1), action=(reg0 = 169.254.100.34; reg1 =
169.254.100.33; eth.src = 00:00:60:15:b8:20; outport = "rtb-2"; next;)
table=15(lr_in_ip_routing_ecmp), priority=100 , match=(reg8[0..15]
== 1 && reg8[16..31] == 2), action=(reg0 = 169.254.100.2; reg1 =
169.254.100.1; eth.src = 00:00:a0:9e:9d:40; outport = "rtb-1"; next;)
table=15(lr_in_ip_routing_ecmp), priority=0 , match=(1),
action=(drop;)
=============== CUT =====================
=============== OUTPUT 25.03.00 =====================
_uuid : 18e0b3b1-4d5b-4e8f-937b-d5d7b33d3f9c
bfd : []
external_ids :
{ic-learned-route="974ae0e0-6b21-4e5f-9a61-5ad329a7b3af"}
ip_prefix : "172.31.3.1/24"
nexthop : "169.254.100.34"
options : {origin=connected}
output_port : []
policy : []
route_table : ""
selection_fields : []
_uuid : a00be0c2-48e1-406d-945d-e0084888e10d
bfd : []
external_ids :
{ic-learned-route="613ac324-26cb-4b78-b0bc-3a91be53fe12"}
ip_prefix : "172.31.3.1/24"
nexthop : "169.254.100.2"
options : {origin=connected}
output_port : []
policy : []
route_table : ""
selection_fields : []
IPv4 Routes
Route Table <main>:
172.31.3.0/24 169.254.100.2 dst-ip (learned) ecmp
172.31.3.0/24 169.254.100.34 dst-ip (learned) ecmp
table=14(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"rtb-1"), action=(reg7 = 1; next;)
table=14(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"rtb-2"), action=(reg7 = 2; next;)
table=14(lr_in_ip_routing_pre), priority=100 , match=(inport ==
"subnet-A"), action=(reg7 = 1; next;)
table=14(lr_in_ip_routing_pre), priority=0 , match=(1),
action=(reg7 = 0; next;)
table=15(lr_in_ip_routing ), priority=10550, match=(nd_rs ||
nd_ra), action=(drop;)
table=15(lr_in_ip_routing ), priority=518 , match=(inport ==
"rtb-1" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::200:a0ff:fe9e:9d40; eth.src =
00:00:a0:9e:9d:40; outport = "rtb-1"; flags.loopback = 1; reg9[9] = 0;
next;)
table=15(lr_in_ip_routing ), priority=518 , match=(inport ==
"rtb-2" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::200:60ff:fe15:b820; eth.src =
00:00:60:15:b8:20; outport = "rtb-2"; flags.loopback = 1; reg9[9] = 0;
next;)
table=15(lr_in_ip_routing ), priority=518 , match=(inport ==
"subnet-A" && ip6.dst == fe80::/64), action=(ip.ttl--; reg8[0..15] = 0;
xxreg0 = ip6.dst; xxreg1 = fe80::d2fe:ff:fe00:14; eth.src =
d0:fe:00:00:00:14; outport = "subnet-A"; flags.loopback = 1; reg9[9] =
0; next;)
table=15(lr_in_ip_routing ), priority=222 , match=(ip4.dst ==
169.254.100.0/27), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst;
reg5 = 169.254.100.1; eth.src = 00:00:a0:9e:9d:40; outport = "rtb-1";
flags.loopback = 1; reg9[9] = 1; next;)
table=15(lr_in_ip_routing ), priority=222 , match=(ip4.dst ==
169.254.100.32/27), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst;
reg5 = 169.254.100.33; eth.src = 00:00:60:15:b8:20; outport = "rtb-2";
flags.loopback = 1; reg9[9] = 1; next;)
table=15(lr_in_ip_routing ), priority=198 , match=(ip4.dst ==
172.31.0.0/24), action=(ip.ttl--; reg8[0..15] = 0; reg0 = ip4.dst; reg5
= 172.31.0.1; eth.src = d0:fe:00:00:00:14; outport = "subnet-A";
flags.loopback = 1; reg9[9] = 1; next;)
table=15(lr_in_ip_routing ), priority=198 , match=(ip4.dst ==
172.31.3.0/24), action=(ip.ttl--; reg8[0..15] = 0; reg0 = 169.254.100.2;
reg5 = 169.254.100.1; eth.src = 00:00:a0:9e:9d:40; outport = "rtb-1";
flags.loopback = 1; reg9[9] = 1; next;)
table=15(lr_in_ip_routing ), priority=198 , match=(ip4.dst ==
172.31.3.0/24), action=(ip.ttl--; reg8[0..15] = 0; reg0 =
169.254.100.34; reg5 = 169.254.100.33; eth.src = 00:00:60:15:b8:20;
outport = "rtb-2"; flags.loopback = 1; reg9[9] = 1; next;)
table=15(lr_in_ip_routing ), priority=0 , match=(1), action=(drop;)
table=16(lr_in_ip_routing_ecmp), priority=150 , match=(reg8[0..15]
== 0), action=(next;)
table=16(lr_in_ip_routing_ecmp), priority=0 , match=(1),
action=(drop;)
=============== CUT =====================
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