Test:

===

Update the extra routes using neutron router-update. (Remove one existing nexthop and add new nexthop for a route  )

Issue:

====

Select group for ipv6 is not updated correctly. Display fib should have two entries for ipv6 extra route . But only one is present.

Impact:

=====

Load balance is impacted .

Details:

=====

Initial configuration:

 

root@cic-1:~# neutron router-update R1 --routes type=dict list=true destination=15.0.0.0/24,nexthop=11.1.2.3 destination=2111:12f:862:18::/64,nexthop=2001:db8:abcd:11:f816:3eff:feb8:ef29 destination=15.0.0.0/24,nexthop=11.1.2.4 destination=2111:12f:862:18::/64,nexthop=2001:db8:abcd:11:f816:3eff:fe9a:bbf4

 

oot@cic-1:~# neutron port-list | grep PORT2-N1

root@cic-1:~#

 

Updated configuration by replacing PORT2-N1 with PORT6-N2

 

root@cic-1:~# neutron port-list | grep PORT6-N2

              

root@cic-1:~# neutron router-update R1 --routes type=dict list=true destination=15.0.0.0/24,nexthop=11.1.2.3 destination=2111:12f:862:18::/64,nexthop=2001:db8:abcd:11:f816:3eff:feb8:ef29 destination=15.0.0.0/24,nexthop=12.23.34.4 destination=2111:12f:862:18::/64,nexthop=2025:caf:3214:12:f816:3eff:fe32:3460

 

In ipv4 selected group it is updated correctly and in ipv6 the previous entry is not removed.

 

In compute-0-1:

============

Bucket not removed in ipv6 nexthop group:

 

root@compute-0-1:~# sudo ovs-ofctl dump-flows br-int -O Openflow13 table=21 | grep 2111:12f:862:18

cookie=0x8000003, duration=91.745s, table=21, n_packets=16, n_bytes=1888, priority=74,ipv6,metadata=0x30d40/0xfffffe,ipv6_dst=2111:12f:862:18::/64 actions=group:150018

root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150018

group_id=150018,type=select,bucket=actions=group:150002,bucket=actions=set_field:0x444->tun_id,set_field:fa:16:3e:9a:bb:f4->eth_dst,load:0x200->NXM_NX_REG6[],resubmit(,220),bucket=actions=set_field:0x430->tun_id,set_field:fa:16:3e:32:34:60->eth_dst,load:0x200->NXM_NX_REG6[],resubmit(,220)

 

 ipv4 nexthop group for reference:

 

root@compute-0-1:~# sudo ovs-ofctl dump-flows br-int -O Openflow13 table=21 | grep 15.0.0.

cookie=0x8000003, duration=117.282s, table=21, n_packets=0, n_bytes=0, priority=34,ip,metadata=0x30d40/0xfffffe,nw_dst=15.0.0.0/24 actions=group:150017

root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150018

 

root@compute-0-1:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150017

group_id=150017,type=select,bucket=actions=group:150001,bucket=actions=set_field:0x430->tun_id,set_field:fa:16:3e:32:34:60->eth_dst,load:0x200->NXM_NX_REG6[],resubmit(,220)

 

 

In compute-0-2:

============

Ipv6 nexthop entries not updated correctly:

 

root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150018

group_id=150018,type=select,bucket=actions=group:150006,bucket=actions=group:150013,bucket=actions=set_field:0x444->tun_id,set_field:fa:16:3e:b8:ef:29->eth_dst,load:0x500->NXM_NX_REG6[],resubmit(,220)

 

root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150006

group_id=150006,type=all,bucket=actions=set_field:fa:16:3e:fd:61:02->eth_src,set_field:fa:16:3e:9a:bb:f4->eth_dst,load:0xf00->NXM_NX_REG6[],resubmit(,220)

 

root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150013

group_id=150013,type=all,bucket=actions=set_field:fa:16:3e:93:27:fd->eth_src,set_field:fa:16:3e:32:34:60->eth_dst,load:0x1300->NXM_NX_REG6[],resubmit(,220)

 

 

Ipv4 nexthop entries for reference:

 

root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150017

group_id=150017,type=select,bucket=actions=group:150014,bucket=actions=set_field:0x444->tun_id,set_field:fa:16:3e:b8:ef:29->eth_dst,load:0x500->NXM_NX_REG6[],resubmit(,220)

 

root@compute-0-2:~# sudo ovs-ofctl dump-groups br-int -O Openflow13 | grep 150014

group_id=150014,type=all,bucket=actions=set_field:fa:16:3e:93:27:fd->eth_src,set_field:fa:16:3e:32:34:60->eth_dst,load:0x1300->NXM_NX_REG6[],resubmit(,220)

 

Entry  2111:12f:862:18::/64 with  nexthop 192.168.113.11 is missing.

display fib output

RD Prefix NextHop Label Origin
-------------------------------------------------------------------
42d563c8-ccad-4369-846d-e44efe428d4a 11.1.2.4/32 192.168.113.11 100010 l
42d563c8-ccad-4369-846d-e44efe428d4a 11.1.2.3/32 192.168.113.10 100006 l
42d563c8-ccad-4369-846d-e44efe428d4a 2025:caf:3214:12:f816:3eff:fef0:9738/128 192.168.113.10 100013 l
42d563c8-ccad-4369-846d-e44efe428d4a 2025:caf:3214:12::1/128 0.0.0.0 100004 l
42d563c8-ccad-4369-846d-e44efe428d4a 11.1.2.5/32 192.168.113.10 100008 l
42d563c8-ccad-4369-846d-e44efe428d4a 11.1.2.6/32 192.168.113.11 100012 l
42d563c8-ccad-4369-846d-e44efe428d4a 15.0.0.0/24 192.168.113.11 100021 s
42d563c8-ccad-4369-846d-e44efe428d4a 15.0.0.0/24 192.168.113.10 100021 s
42d563c8-ccad-4369-846d-e44efe428d4a 2001:db8:abcd:11:f816:3eff:fe9a:bbf4/128 192.168.113.11 100009 l
42d563c8-ccad-4369-846d-e44efe428d4a 2025:caf:3214:12:f816:3eff:fe99:db53/128 192.168.113.10 100016 l
42d563c8-ccad-4369-846d-e44efe428d4a 2001:db8:abcd:11:f816:3eff:fe70:ca52/128 192.168.113.11 100011 l
42d563c8-ccad-4369-846d-e44efe428d4a 2025:caf:3214:12:f816:3eff:fe32:3460/128 192.168.113.11 100017 l
42d563c8-ccad-4369-846d-e44efe428d4a 11.1.2.1/32 0.0.0.0 100001 l
42d563c8-ccad-4369-846d-e44efe428d4a 2001:db8:abcd:11::1/128 0.0.0.0 100002 l
42d563c8-ccad-4369-846d-e44efe428d4a 12.23.34.1/32 0.0.0.0 100003 l
42d563c8-ccad-4369-846d-e44efe428d4a 2001:db8:abcd:11:f816:3eff:fe45:a00c/128 192.168.113.10 100007 l
42d563c8-ccad-4369-846d-e44efe428d4a 12.23.34.3/32 192.168.113.10 100014 l
42d563c8-ccad-4369-846d-e44efe428d4a 12.23.34.6/32 192.168.113.11 100019 l
42d563c8-ccad-4369-846d-e44efe428d4a 12.23.34.5/32 192.168.113.10 100015 l
42d563c8-ccad-4369-846d-e44efe428d4a 12.23.34.4/32 192.168.113.11 100018 l
42d563c8-ccad-4369-846d-e44efe428d4a 2111:12f:862:18::/64 192.168.113.10 100022 s
42d563c8-ccad-4369-846d-e44efe428d4a 2001:db8:abcd:11:f816:3eff:feb8:ef29/128 192.168.113.10 100005 l
42d563c8-ccad-4369-846d-e44efe428d4a 2025:caf:3214:12:f816:3eff:fe10:e5f1/128 192.168.113.11 100020 l

 

From config DS:

============

Config neutron:neutron/routers : http://localhost:8181/restconf/config/neutron:neutron/routers/

{

    "routers": {

        "router": [

            {

                "admin-state-up": true,

                "distributed": false,

                "name": "R1",

                "routes": [

                   

{                         "destination": "15.0.0.0/24",                         "nexthop": "11.1.2.3"                     }

,

                    

{                         "destination": "15.0.0.0/24",                         "nexthop": "12.23.34.4"                     }

,

                   

{                         "destination": "2111:12f:862:18::/64",                         "nexthop": "2001:db8:abcd:11:f816:3eff:feb8:ef29"                     }

,

                   

{                         "destination": "2111:12f:862:18::/64",                         "nexthop": "2025:caf:3214:12:f816:3eff:fe32:3460"                     }

                ],

                "tenant-id": "b0bb63ea-ae6b-4a64-9804-90b59a37a3d9",

                "uuid": "42d563c8-ccad-4369-846d-e44efe428d4a"

            }

        ]

    }

}