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Bug 2131676

Summary:	Missing Neighbor Advertisements on router failover
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Elvira <egarciar>
Component:	ovn22.06	Assignee:	Ales Musil <amusil>
Status:	CLOSED ERRATA	QA Contact:	Jianlin Shi <jishi>
Severity:	high	Docs Contact:
Priority:	high
Version:	FDP 22.G	CC:	amusil, ctrautma, jiji, mmichels
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ovn22.06-22.06.0-115.el8fdp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-03-16 10:15:06 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2131679

Description Elvira 2022-10-03 09:17:17 UTC

Description of problem:
Neighbor Advertisement not found on router failover. More information on the ovs-discuss list:
https://mail.openvswitch.org/pipermail/ovs-discuss/2022-September/052060.html

We could see this happening in Openstack deployments using OVN too. This is a missing feature for Openstack L3 High Availability on IPv6. 

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:

We observe the following situation:
 - We have a logical-router bound to two gateway-chassis
 - The logical-router-port connected to the physical network has an ipv4 address assigned

When we now failover the router (e.g. by changing the priorities) we can observe GARP packets being send out and updating the mac address tables on the physical switches.

If the logical-router-port is now changed from having an ipv4 address to an ipv6 address then failover does not trigger neighbor advertisements.
This means that the mac address tables on our physical switches are not updated and require manual intervention for traffic to be working again.

Comment 1 Ales Musil 2023-01-24 15:04:37 UTC

It seems that it was fixed already in main and 22.12, so all it takes is to backport two patches:
https://github.com/ovn-org/ovn/commit/9ac5485242183fcfc0ecaed5c1c15a6ba68c420f
https://github.com/ovn-org/ovn/commit/f6edbc02929583e0d66ee7938264b471c7cda397

Comment 2 Ales Musil 2023-01-31 09:10:44 UTC

Hi,
how far do you need this fix? Down to 21.12?

Comment 3 Elvira 2023-01-31 11:02:54 UTC

Yes. The OVN version consumed by RHOS 17.0 would be ovn-2021, which I think is equivalent to 21.12. Thanks!!

Comment 4 Ales Musil 2023-02-01 06:22:39 UTC

Backports posted: https://patchwork.ozlabs.org/project/ovn/list/?series=339328

Comment 5 OVN Bot 2023-02-03 05:08:20 UTC

ovn22.09 fast-datapath-rhel-8 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166827
ovn22.09 fast-datapath-rhel-9 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166828
ovn22.06 fast-datapath-rhel-9 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166829
ovn22.03 fast-datapath-rhel-8 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166830
ovn22.03 fast-datapath-rhel-9 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166831
ovn-2021 fast-datapath-rhel-8 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166832
ovn-2021 fast-datapath-rhel-9 clone created at https://bugzilla.redhat.com/show_bug.cgi?id=2166833

Comment 9 Jianlin Shi 2023-02-16 01:56:27 UTC

reproducer:

systemctl start openvswitch                                                                           
systemctl start ovn-northd                                                                            
ovn-nbctl set-connection ptcp:6641                                                                    
ovn-sbctl set-connection ptcp:6642                                                                    
ovs-vsctl set open . external_ids:system-id=hv1 external_ids:ovn-remote=tcp:127.0.0.1:6642 external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=127.0.0.1
systemctl restart ovn-controller

ovn-nbctl ls-add ls0                                                                                 
ovn-nbctl create Logical_Router name=lr0 options:chassis=hv1                                         
ovn-nbctl lrp-add lr0 lrp0 f0:00:00:00:00:01 fd12:3456:789a:1::1/64                                  
ovn-nbctl lsp-add ls0 lrp0-rp -- set Logical_Switch_Port lrp0-rp \
    type=router options:router-port=lrp0 addresses='"f0:00:00:00:00:01"'
ovn-nbctl lsp-set-options lrp0-rp router-port=lrp0 nat-addresses="router"                            
ovn-nbctl lr-nat-add lr0 dnat_and_snat 3010::119 fd12:3456:789a:1::119

ovs-vsctl \
    -- add-br br-eth0
ovs-vsctl add-port br-eth0 ext1 -- set interface ext1 type=internal
ip netns add ext1
ip link set ext1 netns ext1
ip netns exec ext1 ip link set ext1 up
ip netns exec ext1 ip addr add fd12:3456:789a:1::2/64 dev ext1

ip netns exec ext1 tcpdump -i ext1 -w ext1.pcap -nnle &
sleep 2

ovs-vsctl set Open_vSwitch . external-ids:ovn-bridge-mappings=physnet1:br-eth0
ovn-nbctl lsp-add ls0 ln_port
ovn-nbctl lsp-set-addresses ln_port unknown
ovn-nbctl lsp-set-type ln_port localnet
ovn-nbctl lsp-set-options ln_port network_name=physnet1

ovn-nbctl --wait=hv sync
while :
do
        if ovs-vsctl show | grep patch-br-int-to-ln_port
        then
                break
        else
                sleep 1
        fi
done
sleep 15
pkill tcpdump
sleep 2
tcpdump -r ext1.pcap -nnle -v
ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses=""
ip netns exec ext1 tcpdump -i ext1 -w ext1_2.pcap -nnle &
sleep 2
ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses="router"
sleep 5
pkill tcpdump
sleep 2

tcpdump -r ext1_2.pcap -nnle -v


result on ovn22.06-22.06.0-82.el8:

[root@wsfd-advnetlab16 bz2131676]# rpm -qa | grep -E "openvswitch2.17|ovn22.06"
python3-openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.06-central-22.06.0-82.el8fdp.x86_64
openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.06-22.06.0-82.el8fdp.x86_64
ovn22.06-host-22.06.0-82.el8fdp.x86_64

+ tcpdump -r ext1.pcap -nnle -v
reading from file ext1.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
20:49:15.062019 d6:6e:f7:51:ff:bc > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) :: > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff51:ffbc to_ex, 0 source(s)]
20:49:15.638078 d6:6e:f7:51:ff:bc > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd12:3456:789a:1::2
          unknown option (14), length 8 (1): 
          0x0000:  7eaf 6668 1258
20:49:15.766061 d6:6e:f7:51:ff:bc > 33:33:ff:51:ff:bc, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff51:ffbc: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::d46e:f7ff:fe51:ffbc
          unknown option (14), length 8 (1): 
          0x0000:  f24c 782e 021b                                                                     
20:49:16.790107 d6:6e:f7:51:ff:bc > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::d46e:f7ff:fe51:ffbc > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff51:ffbc to_ex, 0 source(s)]
20:49:16.790143 d6:6e:f7:51:ff:bc > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::d46e:f7ff:fe51:ffbc > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): d6:6e:f7:51:ff:bc                             
20:49:17.814060 d6:6e:f7:51:ff:bc > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::d46e:f7ff:fe51:ffbc > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff51:ffbc to_ex, 0 source(s)]
20:49:20.502014 d6:6e:f7:51:ff:bc > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::d46e:f7ff:fe51:ffbc > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): d6:6e:f7:51:ff:bc
20:49:27.926049 d6:6e:f7:51:ff:bc > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::d46e:f7ff:fe51:ffbc > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16                                                                       
          source link-address option (1), length 8 (1): d6:6e:f7:51:ff:bc    

<==== no rarp received
                         
+ ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses=                         
+ ip netns exec ext1 tcpdump -i ext1 -w ext1_2.pcap -nnle                                             
+ sleep 2                                                                                             
dropped privs to tcpdump                                                                              
tcpdump: listening on ext1, link-type EN10MB (Ethernet), capture size 262144 bytes                    
+ ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses=router                   
+ sleep 5                                                                                             
+ pkill tcpdump                                                                                       
0 packets captured                                                                                    
0 packets received by filter                                                                          
0 packets dropped by kernel                                                                           
+ sleep 2                                                                                             
+ tcpdump -r ext1_2.pcap -nnle -v                                                                     
reading from file ext1_2.pcap, link-type EN10MB (Ethernet)                                            
dropped privs to tcpdump

result on ovn22.06-22.06.0-115.el8:

[root@wsfd-advnetlab16 bz2131676]# rpm -qa | grep -E "openvswitch2.17|ovn22.06"
python3-openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.06-22.06.0-115.el8fdp.x86_64
openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.06-central-22.06.0-115.el8fdp.x86_64
ovn22.06-host-22.06.0-115.el8fdp.x86_64

+ tcpdump -r ext1.pcap -nnle -v
reading from file ext1.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
20:51:27.526019 26:7c:8e:94:dc:89 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) :: > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff94:dc89 to_ex, 0 source(s)]
20:51:27.534032 26:7c:8e:94:dc:89 > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd12:3456:789a:1::2
          unknown option (14), length 8 (1): 
          0x0000:  8723 1008 5ccc
20:51:28.246079 26:7c:8e:94:dc:89 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::247c:8eff:fe94:dc89 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff94:dc89 to_ex, 0 source(s)]
20:51:28.246104 26:7c:8e:94:dc:89 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::247c:8eff:fe94:dc89 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 26:7c:8e:94:dc:89
20:51:28.646025 26:7c:8e:94:dc:89 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::247c:8eff:fe94:dc89 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:ff94:dc89 to_ex, 0 source(s)]
20:51:30.321083 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
20:51:32.323261 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
20:51:32.854125 26:7c:8e:94:dc:89 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::247c:8eff:fe94:dc89 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 26:7c:8e:94:dc:89
20:51:36.327413 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
20:51:41.558026 26:7c:8e:94:dc:89 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::247c:8eff:fe94:dc89 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 26:7c:8e:94:dc:89

<=== rarp is received

+ ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses=
+ sleep 2
+ ip netns exec ext1 tcpdump -i ext1 -w ext1_2.pcap -nnle
dropped privs to tcpdump
tcpdump: listening on ext1, link-type EN10MB (Ethernet), capture size 262144 bytes
+ ovn-nbctl --wait=hv lsp-set-options lrp0-rp router-port=lrp0 nat-addresses=router
+ sleep 5
+ pkill tcpdump
0 packets captured
0 packets received by filter
0 packets dropped by kernel
+ sleep 2
+ tcpdump -r ext1_2.pcap -nnle -v
reading from file ext1_2.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump

<=== no rarp is received when re-add nat-addresses option, Ales, is this expected?

Comment 10 Ales Musil 2023-02-16 06:48:09 UTC

Yes, due to the backoff and no change with the interface.
I would suggest to extend the test with another chassis
and simply move the LR to the second chassis. You should see
the rarps being sent on the second chassis.

Comment 11 Jianlin Shi 2023-02-16 07:27:06 UTC

updated reproducer based on comment 10:

systemctl start openvswitch                                                                           
systemctl start ovn-northd                                                                            
ovn-nbctl set-connection ptcp:6641                                                                    
ovn-sbctl set-connection ptcp:6642                                                                    
ovs-vsctl set open . external_ids:system-id=hv1 external_ids:ovn-remote=tcp:127.0.0.1:6642 external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=127.0.0.1
systemctl restart ovn-controller                                                                      
                                                                                                      
ovn-nbctl ls-add ls0                                                                                  
ovn-nbctl create Logical_Router name=lr0 options:chassis=hv1                                          
ovn-nbctl lrp-add lr0 lrp0 f0:00:00:00:00:01 fd12:3456:789a:1::1/64                                   
ovn-nbctl lsp-add ls0 lrp0-rp -- set Logical_Switch_Port lrp0-rp \                                    
    type=router options:router-port=lrp0 addresses='"f0:00:00:00:00:01"'                              
ovn-nbctl lsp-set-options lrp0-rp router-port=lrp0 nat-addresses="router"                             
ovn-nbctl lr-nat-add lr0 dnat_and_snat 3010::119 fd12:3456:789a:1::119                                
                                                                                                      
ovs-vsctl \                                                                                           
    -- add-br br-eth0                                                                                 
ovs-vsctl add-port br-eth0 ext1 -- set interface ext1 type=internal                                   
ip netns add ext1                                                                                     
ip link set ext1 netns ext1                                                                           
ip netns exec ext1 ip link set ext1 up                                                                
ip netns exec ext1 ip addr add fd12:3456:789a:1::2/64 dev ext1                                        
                                                                                                      
ip netns exec ext1 tcpdump -i ext1 -w ext1.pcap -nnle &                                               
sleep 2                                                                                               
                                                                                                      
ovs-vsctl set Open_vSwitch . external-ids:ovn-bridge-mappings=physnet1:br-eth0                        
ovn-nbctl lsp-add ls0 ln_port                                                                         
ovn-nbctl lsp-set-addresses ln_port unknown                                                           
ovn-nbctl lsp-set-type ln_port localnet                                                               
ovn-nbctl lsp-set-options ln_port network_name=physnet1                                               
                                                                                                      
ovn-nbctl --wait=hv sync                                                                              
while :                                                                                               
do                                                                                                    
        if ovs-vsctl show | grep patch-br-int-to-ln_port                                              
        then                                                                                          
                break                                                                                 
        else                                                                                          
                sleep 1                                                                               
        fi                                                                                            
done                                                                                                  
sleep 15                                                                                              
pkill tcpdump                                                                                         
sleep 2                                                                                               
tcpdump -r ext1.pcap -nnle -v                                                                         
ip netns exec ext1 tcpdump -i ext1 -w ext1_2.pcap -nnle &                                             
sleep 2                                                                                               
ovn-nbctl --wait=hv set logical_router lr0 options:chassis=hv0                                        
sleep 2                                                                                               
ovn-nbctl set logical_router lr0 options:chassis=hv1                                                  
sleep 5                                                                                               
pkill tcpdump                                                                                         
sleep 2                                                                                               
                                                                                                      
tcpdump -r ext1_2.pcap -nnle -v

result on ovn22.06-22.06.0-115.el8:

+ tcpdump -r ext1.pcap -nnle -v
reading from file ext1.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
02:25:35.806056 ba:4a:9a:f0:a6:a5 > 33:33:ff:f0:a6:a5, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:fff0:a6a5: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::b84a:9aff:fef0:a6a5
          unknown option (14), length 8 (1): 
          0x0000:  afda 2a3b 8a6f
02:25:35.838026 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) :: > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:fff0:a6a5 to_ex, 0 source(s)]
02:25:36.118074 ba:4a:9a:f0:a6:a5 > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd12:3456:789a:1::2
          unknown option (14), length 8 (1): 
          0x0000:  7e1e 26f3 8e2e
02:25:36.822086 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::b84a:9aff:fef0:a6a5 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:fff0:a6a5 to_ex, 0 source(s)]
02:25:36.822113 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::b84a:9aff:fef0:a6a5 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): ba:4a:9a:f0:a6:a5
02:25:37.462050 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::b84a:9aff:fef0:a6a5 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 2 group record(s) [gaddr ff02::1:ff00:2 to_ex, 0 source(s)] [gaddr ff02::1:fff0:a6a5 to_ex, 0 source(s)]
02:25:38.683833 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
02:25:40.686050 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
02:25:41.238159 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::b84a:9aff:fef0:a6a5 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): ba:4a:9a:f0:a6:a5
02:25:44.690155 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
02:25:49.430167 ba:4a:9a:f0:a6:a5 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::b84a:9aff:fef0:a6a5 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): ba:4a:9a:f0:a6:a5
+ sleep 2
+ ip netns exec ext1 tcpdump -i ext1 -w ext1_2.pcap -nnle
dropped privs to tcpdump
tcpdump: listening on ext1, link-type EN10MB (Ethernet), capture size 262144 bytes
+ ovn-nbctl --wait=hv set logical_router lr0 options:chassis=hv0
+ sleep 2
+ ovn-nbctl set logical_router lr0 options:chassis=hv1
+ sleep 5
+ pkill tcpdump
2 packets captured
2 packets received by filter
0 packets dropped by kernel
+ sleep 2
+ tcpdump -r ext1_2.pcap -nnle -v
reading from file ext1_2.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
02:25:59.835694 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28
02:26:01.838062 f0:00:00:00:00:01 > ff:ff:ff:ff:ff:ff, ethertype Reverse ARP (0x8035), length 42: Ethernet (len 6), IPv4 (len 4), Reverse Request who-is f0:00:00:00:00:01 tell f0:00:00:00:00:01, length 28

Comment 13 errata-xmlrpc 2023-03-16 10:15:06 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (ovn22.06 bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:1290