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Bug 2166827

Summary:	Missing Neighbor Advertisements on router failover
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	OVN Bot <ovn-bot>
Component:	ovn22.09	Assignee:	Ales Musil <amusil>
Status:	CLOSED UPSTREAM	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:	ovn22.09-22.09.0-59.el8fdp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-02-10 04:01:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OVN Bot 2023-02-03 05:07:58 UTC

This is an automatically-generated clone of issue https://bugzilla.redhat.com/show_bug.cgi?id=2131676

Comment 4 Jianlin Shi 2023-02-16 07:38:58 UTC

reproduced on ovn22.09-22.09.0-32.el8:

[root@wsfd-advnetlab16 bz2131676]# rpm -qa | grep -E "openvswitch2.17|ovn22.09"
python3-openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.09-host-22.09.0-32.el8fdp.x86_64
openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.09-22.09.0-32.el8fdp.x86_64
ovn22.09-central-22.09.0-32.el8fdp.x86_64

+ tcpdump -r ext1.pcap -nnle -v
reading from file ext1.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
02:36:17.910062 9e:15:43:f7:cb:87 > 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:  2d5e bbf7 6650
02:36:18.230050 9e:15:43:f7:cb:87 > 33:33:ff:f7:cb:87, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:fff7:cb87: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::9c15:43ff:fef7:cb87
          unknown option (14), length 8 (1): 
          0x0000:  8319 b1fd f46c
02:36:18.422048 9e:15:43:f7:cb:87 > 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:fff7:cb87 to_ex, 0 source(s)]
02:36:19.254062 9e:15:43:f7:cb:87 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::9c15:43ff:fef7:cb87 > 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:fff7:cb87 to_ex, 0 source(s)]
02:36:19.254086 9e:15:43:f7:cb:87 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::9c15:43ff:fef7:cb87 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 9e:15:43:f7:cb:87
02:36:19.710041 9e:15:43:f7:cb:87 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::9c15:43ff:fef7:cb87 > 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:fff7:cb87 to_ex, 0 source(s)]
02:36:23.094035 9e:15:43:f7:cb:87 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::9c15:43ff:fef7:cb87 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 9e:15:43:f7:cb:87
02:36:30.454039 9e:15:43:f7:cb:87 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::9c15:43ff:fef7:cb87 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 9e:15:43:f7:cb:87                             
+ 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 set logical_router lr0 options:chassis=hv0                                      
+ sleep 2
+ ovn-nbctl set logical_router lr0 options:chassis=hv1                                                
+ sleep 5
+ pkill tcpdump
1 packet captured
1 packet 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
02:36:44.790122 9e:15:43:f7:cb:87 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::9c15:43ff:fef7:cb87 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16                                                                       
          source link-address option (1), length 8 (1): 9e:15:43:f7:cb:87  


Verified on ovn22.09-22.09.0-59.el8:


+ tcpdump -r ext1.pcap -nnle -v
reading from file ext1.pcap, link-type EN10MB (Ethernet)
dropped privs to tcpdump
02:37:42.998040 72:41:f2:ab:3a:0a > 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:ffab:3a0a to_ex, 0 source(s)]
02:37:43.606064 72:41:f2:ab:3a:0a > 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:  88e5 b59b 8d57
02:37:43.926072 72:41:f2:ab:3a:0a > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::7041:f2ff:feab:3a0a > 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:ffab:3a0a to_ex, 0 source(s)]
02:37:43.926096 72:41:f2:ab:3a:0a > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::7041:f2ff:feab:3a0a > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 72:41:f2:ab:3a:0a
02:37:44.822015 72:41:f2:ab:3a:0a > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: (hlim 1, next-header Options (0) payload length: 56) fe80::7041:f2ff:feab:3a0a > 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:ffab:3a0a to_ex, 0 source(s)]
02:37:45.911772 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
02:37:47.914005 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
02:37:48.278055 72:41:f2:ab:3a:0a > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::7041:f2ff:feab:3a0a > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 72:41:f2:ab:3a:0a
02:37:51.918398 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
02:37:56.982010 72:41:f2:ab:3a:0a > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::7041:f2ff:feab:3a0a > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 72:41:f2:ab:3a:0a
+ 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
02:38:07.062291 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
02:38:09.064323 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
[root@wsfd-advnetlab16 bz2131676]# rpm -qa | grep -E "openvswitch2.17|ovn22.09"
python3-openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.09-host-22.09.0-59.el8fdp.x86_64
ovn22.09-22.09.0-59.el8fdp.x86_64
openvswitch2.17-2.17.0-60.el8fdp.x86_64
ovn22.09-central-22.09.0-59.el8fdp.x86_64

Comment 6 Red Hat Bugzilla 2025-02-10 04:01:50 UTC

This product has been discontinued or is no longer tracked in Red Hat Bugzilla.