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Configuration:
->Configure 8 networks, 2 VMs in each network and 1 VM on each compute(2 DPN)
->Configure router, associate subnets to router and vpn instance with 8 RDs
->Associate router to VPN
->Configure extra route with 8 VMs as nexthops
->Associate router to VPN
Test Case:
->Dissociate router and check load balancing/ECMP groups ->Working
->Associate router and check load balancing/ECMP groups ->Not working. ECMP group on one compute is not programmed correctly
Step-1:Dissociate router from VPN : Load balance is WORKING
root@cic-1:~# neutron bgpvpn-router-assoc-delete f7c90e18-c0db-40a2-b54e-923cc87a9ef0 VPN1
Deleted router_association: f7c90e18-c0db-40a2-b54e-923cc87a9ef0
root@cic-1:~#
Step-2: Associate the router back to VPN : Load balancing FAILS.
root@cic-1:~# neutron bgpvpn-router-assoc-create VPN1 --router aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd
Created a new router_association:
----------
----------
| id |
ee0529a3-4408-44bd-bb56-199ec72e16f4 |
| router_id |
aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd |
| tenant_id |
b0bb63eaae6b4a64980490b59a37a3d9 |
----------
root@cic-1:~# neutron router-show R1
----------------------
----------------------
| admin_state_up |
True |
| description |
|
| distributed |
False |
| external_gateway_info |
|
| id |
aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd |
| name |
R1 |
| routes |
{"destination": "20.0.0.0/24", "nexthop": "11.1.2.3"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "12.23.34.4"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "13.5.4.3"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "14.42.62.4"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "15.8.9.3"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "16.6.67.4"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "17.7.6.3"} |
| |
{"destination": "20.0.0.0/24", "nexthop": "18.6.6.4"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2001:db8:abcd:11:f816:3eff:fe47:5af1"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2025:caf:3214:12:f816:3eff:fef1:8ac5"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2033:456a:f012:13:f816:3eff:feeb:b485"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2056:212:d562:14:f816:3eff:fee9:c346"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2062:321:543:15:f816:3eff:feb8:9957"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2078:fde:2cd:16:f816:3eff:fe30:3d70"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2123:13f:565:17:f816:3eff:feb8:26fa"} |
| |
{"destination": "2111:12f:862:18::/64", "nexthop": "2234:777:222:18:f816:3eff:fe8f:cfa3"} |
| status |
ACTIVE |
| tenant_id |
b0bb63eaae6b4a64980490b59a37a3d9 |
----------------------
root@cic-1:~# neutron bgpvpn-router-assoc-list VPN1
-------------------------------------
-------------------------------------
| ee0529a3-4408-44bd-bb56-199ec72e16f4 |
aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd |
-------------------------------------
root@cic-1:~# neutron router-list
-------------------------------------
| id |
name |
external_gateway_info |
distributed |
-------------------------------------
| aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd |
R1 |
null |
False |
-------------------------------------
root@cic-1:~#
root@cic-1:~# neutron bgpvpn-show VPN1
---------------------
---------------------
| export_targets |
100:1 |
| id |
a0b7227d-6c66-47a5-bd00-7c4d1b260509 |
| import_targets |
100:11 |
| name |
VPN1 |
| networks |
|
| route_distinguishers |
100:21 |
| |
100:22 |
| |
100:23 |
| |
100:24 |
| |
100:25 |
| |
100:26 |
| |
100:27 |
| |
100:28 |
| route_targets |
|
| routers |
aaa7f0bb-cf03-4e32-ba90-4e2fa49789bd |
| tenant_id |
b0bb63eaae6b4a64980490b59a37a3d9 |
| type |
l3 |
---------------------
root@cic-1:~#
On Compute-0-2:
==============
After Step-1: WORKING
root@compute-0-2:~# sh table.sh 21 | grep 2111
cookie=0x8000003, duration=69.039s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30d40/0xfffffe,ipv6_dst=2111:12f:862:18::/64 actions=group:150078
root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150078
group_id=150078,type=select,bucket=actions=group:150075,bucket=actions=group:150077,bucket=actions=group:150076,bucket=actions=group:150082,bucket=actions=set_field:0x420->tun_id,set_field:fa:16:3e:47:5a:f1->eth_dst,output:186,bucket=actions=set_field:0x430->tun_id,set_field:fa:16:3e:b8:26:fa->eth_dst,output:186,bucket=actions=set_field:0x427->tun_id,set_field:fa:16:3e:b8:99:57->eth_dst,output:186,bucket=actions=set_field:0x434->tun_id,set_field:fa:16:3e:eb:b4:85->eth_dst,output:186
After Step-2: NOT WOKING
root@compute-0-2:~# sh table.sh 21 | grep 2111
cookie=0x8000003, duration=172.879s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30d9e/0xfffffe,ipv6_dst=2111:12f:862:18::/64 actions=group:150118
root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150118
group_id=150118,type=select,bucket=actions=group:150123,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:47:5a:f1->eth_dst,output:186,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:b8:26:fa->eth_dst,output:186,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:b8:99:57->eth_dst,output:186,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:eb:b4:85->eth_dst,output:186
root@compute-0-2:~# sh table.sh 20 | grep 100167
cookie=0x8000002, duration=5894.392s, table=20, n_packets=0, n_bytes=0, priority=10,mpls,mpls_label=100167 actions=pop_mpls:0x86dd,group:150119
root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150119
group_id=150119,type=select,bucket=actions=group:150123
On compute-0-1:
==============
After Step-1: WORKING
root@compute-0-1:~# sh table.sh 21 | grep 2111
cookie=0x8000003, duration=27.687s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30d40/0xfffffe,ipv6_dst=2111:12f:862:18::/64 actions=group:150078
root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150078
group_id=150078,type=select,bucket=actions=group:150090,bucket=actions=group:150084,bucket=actions=group:150094,bucket=actions=group:150080,bucket=actions=set_field:0x44d->tun_id,set_field:fa:16:3e:30:3d:70->eth_dst,output:88,bucket=actions=set_field:0x438->tun_id,set_field:fa:16:3e:8f:cf:a3->eth_dst,output:88,bucket=actions=set_field:0x3f0->tun_id,set_field:fa:16:3e:f1:8a:c5->eth_dst,output:88,bucket=actions=set_field:0x408->tun_id,set_field:fa:16:3e:e9:c3:46->eth_dst,output:88
After Step-2: WORKING
root@compute-0-1:~# sh table.sh 21 | grep 2111
cookie=0x8000003, duration=20.020s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30d9e/0xfffffe,ipv6_dst=2111:12f:862:18::/64 actions=group:150118
root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150118
group_id=150118,type=select,bucket=actions=group:150121,bucket=actions=group:150122,bucket=actions=group:150126,bucket=actions=group:150120,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:8f:cf:a3->eth_dst,output:88,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:30:3d:70->eth_dst,output:88,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:e9:c3:46->eth_dst,output:88,bucket=actions=set_field:0x18747->tun_id,set_field:fa:16:3e:f1:8a:c5->eth_dst,output:88
root@compute-0-1:~# sh table.sh 20 | grep 100167
cookie=0x8000002, duration=5876.602s, table=20, n_packets=0, n_bytes=0, priority=10,mpls,mpls_label=100167 actions=pop_mpls:0x86dd,group:150119
root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150119
group_id=150119,type=select,bucket=actions=group:150121,bucket=actions=group:150122,bucket=actions=group:150126,bucket=actions=group:150120
Detail issue description is attached.
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issue_description.txt