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Bug 1787000

Summary: one extra DNSSL is added
Product: Red Hat Enterprise Linux Fast Datapath Reporter: Jianlin Shi <jishi>
Component: ovn2.11Assignee: lorenzo bianconi <lorenzo.bianconi>
Status: CLOSED ERRATA QA Contact: Jianlin Shi <jishi>
Severity: medium Docs Contact:
Priority: medium    
Version: FDP 20.ACC: ctrautma, lorenzo.bianconi, mmichels
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: ovn2.11-2.11.1-28.el7fdn Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1789476 (view as bug list) Environment:
Last Closed: 2020-03-10 10:07:57 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: 1789476    

Description Jianlin Shi 2019-12-30 09:12:59 UTC 
Description of problem:
one extra DNSSL is added

Version-Release number of selected component (if applicable):
ovn2.11-2.11.1-24.el8fdp.x86_64

How reproducible:
Always 

Steps to Reproduce:
https://bugzilla.redhat.com/show_bug.cgi?id=1699332#c7
https://bugzilla.redhat.com/show_bug.cgi?id=1699332#c6

Actual results:
dnssl is: search aa.bb.cc aa

Expected results:
dnssl is search aa.bb.cc

Additional info:
Comment 2 Jianlin Shi 2020-01-03 02:23:35 UTC 
[root@dell-per740-12 bz1787000]# ovn-sbctl list port_binding
_uuid               : 37f82fe5-45e0-4c12-87d3-8805cc0d3f29
chassis             : a8a014ef-2ade-4fd0-9b97-1a9ddc37edd8
datapath            : 96a82ba1-2eec-4e4c-9ff8-4a5f59ce4cf8
encap               : []
external_ids        : {}                                  
gateway_chassis     : []                                  
ha_chassis_group    : []                                  
logical_port        : ls1p3
mac                 : ["00:00:00:01:03:02"]               
nat_addresses       : []
options             : {}                                  
parent_port         : []   
tag                 : []                   
tunnel_key          : 4 
type                : ""
virtual_parent      : []     
                                                                 
_uuid               : 852e1f99-9e2f-468e-939e-6b435258a561
chassis             : []                                                                                                                                                                                    
datapath            : 96a82ba1-2eec-4e4c-9ff8-4a5f59ce4cf8                                                                                                                 
encap               : []
external_ids        : {}                                  
gateway_chassis     : []                                  
ha_chassis_group    : []                                  
logical_port        : ls1-lr1
mac                 : ["00:00:00:00:00:01"]
nat_addresses       : []
options             : {peer=lr1-ls1}
parent_port         : []
tag                 : []
tunnel_key          : 3
type                : patch
virtual_parent      : []

_uuid               : e709c686-20db-4cd2-9efd-4334c8771aa4
chassis             : a8a014ef-2ade-4fd0-9b97-1a9ddc37edd8
datapath            : 96a82ba1-2eec-4e4c-9ff8-4a5f59ce4cf8
encap               : []
external_ids        : {}
gateway_chassis     : []
ha_chassis_group    : []
logical_port        : ls1p2
mac                 : ["00:00:00:01:02:02"]
nat_addresses       : []
options             : {}
parent_port         : []
tag                 : []
tunnel_key          : 2
type                : ""
virtual_parent      : []

_uuid               : 529c23b3-221a-4805-a44e-0c384c937cb1
chassis             : e2ef5a3a-3c4d-44a4-a130-f10112de0c98
datapath            : 96a82ba1-2eec-4e4c-9ff8-4a5f59ce4cf8
encap               : []
external_ids        : {}
gateway_chassis     : []
ha_chassis_group    : []
logical_port        : ls1p1
mac                 : ["00:00:00:01:01:02"]
nat_addresses       : []
options             : {}
parent_port         : []
tag                 : []
tunnel_key          : 1
type                : ""
virtual_parent      : []

_uuid               : eb1ead73-aff5-4c89-8450-89659810a738
chassis             : []
datapath            : bc1b6b02-280b-4a9f-b0f1-edad9eeb7cd8
encap               : []
external_ids        : {}
gateway_chassis     : []
ha_chassis_group    : []
logical_port        : lr1-ls1
mac                 : ["00:00:00:00:00:01 aef0:0:0:0:0:0:0:1/64"]
nat_addresses       : []
options             : {ipv6_ra_address_mode=slaac, ipv6_ra_dnssl=aa.bb.cc, ipv6_ra_max_interval="4", ipv6_ra_min_interval="3", ipv6_ra_prefixes="aef0::/64", ipv6_ra_prf=LOW, ipv6_ra_rdnss="aef0::11", ipv6
_ra_route_info="HIGH-aef1::11/48,LOW-aef2::11/96", ipv6_ra_send_periodic="true", ipv6_ra_src_addr="fe80::200:ff:fe00:1", ipv6_ra_src_eth="00:00:00:00:00:01", peer=ls1-lr1}
parent_port         : []
tag                 : []
tunnel_key          : 1
type                : patch
virtual_parent      : []


packets captured in vm:

21:21:54.122062 00:00:00:00:00:01 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 198: (hlim 255, next-header ICMPv6 (58) payload length: 144) fe80::200:ff:fe00:1 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 144
        hop limit 255, Flags [none], pref low, router lifetime 65535s, reachable time 0ms, retrans time 0ms
          source link-address option (1), length 8 (1): 00:00:00:00:00:01
            0x0000:  0000 0000 0001
          prefix info option (3), length 32 (4): aef0::/64, Flags [onlink, auto], valid time infinity, pref. time infinity
            0x0000:  40c0 ffff ffff ffff ffff 0000 0000 aef0
            0x0010:  0000 0000 0000 0000 0000 0000 0000
          rdnss option (25), length 24 (3):  lifetime 4294967295s, addr: aef0::11
            0x0000:  0000 ffff ffff aef0 0000 0000 0000 0000
            0x0010:  0000 0000 0011
          dnssl option (31), length 24 (3):  lifetime 4294967295s, domain(s): aa.bb.cc.
            0x0000:  0000 ffff ffff 0261 6102 6262 0263 6300
            0x0010:  0000 0000 0000

<=== aa.bb.cc

          route info option (24), length 16 (2):  aef1::/48, pref=high, lifetime=infinity
            0x0000:  3008 ffff ffff aef1 0000 0000 0000
          route info option (24), length 24 (3):  aef2::/96, pref=low, lifetime=infinity
            0x0000:  6018 ffff ffff aef2 0000 0000 0000 0000
            0x0010:  0000 0000 0000

<=== also sometimes with route info, sometimes without route info, i don't know if this is a bug

21:21:54.124207 00:00:00:01:03:02 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 90: (hlim 1, next-header Options (0) payload length: 36) fe80::200:ff:fe01:302 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 1 group record(s) [gaddr ff02::1:ff01:302 to_ex { }]
21:21:54.726195 00:00:00:01:03:02 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 90: (hlim 1, next-header Options (0) payload length: 36) fe80::200:ff:fe01:302 > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 1 group record(s) [gaddr ff02::1:ff01:302 to_ex { }]
21:21:57.246265 00:00:00:00:00:01 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 150: (hlim 255, next-header ICMPv6 (58) payload length: 96) fe80::200:ff:fe00:1 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 96
        hop limit 255, Flags [none], pref low, router lifetime 65535s, reachable time 0ms, retrans time 0ms
          source link-address option (1), length 8 (1): 00:00:00:00:00:01
            0x0000:  0000 0000 0001
          prefix info option (3), length 32 (4): aef0::/64, Flags [onlink, auto], valid time infinity, pref. time infinity
            0x0000:  40c0 ffff ffff ffff ffff 0000 0000 aef0
            0x0010:  0000 0000 0000 0000 0000 0000 0000
          rdnss option (25), length 24 (3):  lifetime 4294967295s, addr: aef0::11
            0x0000:  0000 ffff ffff aef0 0000 0000 0000 0000
            0x0010:  0000 0000 0011
          dnssl option (31), length 16 (2):  lifetime 4294967295s, domain(s): aa.
            0x0000:  0000 ffff ffff 0261 6100 0000 0000

<==== aa
Comment 4 Jianlin Shi 2020-02-06 02:50:09 UTC 
Verified on 2.11.1-33 with steps in https://bugzilla.redhat.com/show_bug.cgi?id=1699332#c7
https://bugzilla.redhat.com/show_bug.cgi?id=1699332#c6:

[root@localhost eth1]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 52:54:00:76:ec:a7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.248/24 brd 192.168.122.255 scope global noprefixroute dynamic eth0
       valid_lft 3404sec preferred_lft 3404sec
    inet6 fe80::5054:ff:fe76:eca7/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:00:00:01:03:02 brd ff:ff:ff:ff:ff:ff
    inet6 aef0::200:ff:fe01:302/64 scope global noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::200:ff:fe01:302/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@localhost eth1]# ip -6 r
unreachable ::/96 dev lo metric 1024 error -113 pref medium
unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -113 pref medium
unreachable 2002:a00::/24 dev lo metric 1024 error -113 pref medium
unreachable 2002:7f00::/24 dev lo metric 1024 error -113 pref medium
unreachable 2002:a9fe::/32 dev lo metric 1024 error -113 pref medium
unreachable 2002:ac10::/28 dev lo metric 1024 error -113 pref medium
unreachable 2002:c0a8::/32 dev lo metric 1024 error -113 pref medium
unreachable 2002:e000::/19 dev lo metric 1024 error -113 pref medium
unreachable 3ffe:ffff::/32 dev lo metric 1024 error -113 pref medium
aef0::/64 dev eth1 proto ra metric 101 pref medium
aef1::/48 via fe80::200:ff:fe00:1 dev eth1 proto ra metric 101 pref high
aef2::/96 via fe80::200:ff:fe00:1 dev eth1 proto ra metric 101 pref low
fe80::/64 dev eth1 proto kernel metric 101 pref medium
fe80::/64 dev eth0 proto kernel metric 256 pref medium
default via fe80::200:ff:fe00:1 dev eth1 proto ra metric 101 pref low
[root@localhost eth1]# cat /etc/resolv.conf 
# Generated by NetworkManager
search aa.bb.cc
nameserver 192.168.122.1
nameserver aef0::11

packets on eth1:

21:49:35.900974 00:00:00:00:00:01 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 198: (hlim 255, next-header ICMPv6 (58) payload length: 144) fe80::200:ff:fe00:1 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 144
        hop limit 255, Flags [none], pref low, router lifetime 65535s, reachable time 0ms, retrans time 0ms
          source link-address option (1), length 8 (1): 00:00:00:00:00:01
            0x0000:  0000 0000 0001
          prefix info option (3), length 32 (4): aef0::/64, Flags [onlink, auto], valid time infinity, pref. time infinity
            0x0000:  40c0 ffff ffff ffff ffff 0000 0000 aef0
            0x0010:  0000 0000 0000 0000 0000 0000 0000
          rdnss option (25), length 24 (3):  lifetime 4294967295s, addr: aef0::11
            0x0000:  0000 ffff ffff aef0 0000 0000 0000 0000
            0x0010:  0000 0000 0011
          dnssl option (31), length 24 (3):  lifetime 4294967295s, domain(s): aa.bb.cc.
            0x0000:  0000 ffff ffff 0261 6102 6262 0263 6300
            0x0010:  0000 0000 0000
          route info option (24), length 16 (2):  aef1::/48, pref=high, lifetime=infinity
            0x0000:  3008 ffff ffff aef1 0000 0000 0000
          route info option (24), length 24 (3):  aef2::/96, pref=low, lifetime=infinity
            0x0000:  6018 ffff ffff aef2 0000 0000 0000 0000
            0x0010:  0000 0000 0000

21:49:39.203243 00:00:00:00:00:01 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 198: (hlim 255, next-header ICMPv6 (58) payload length: 144) fe80::200:ff:fe00:1 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 144
        hop limit 255, Flags [none], pref low, router lifetime 65535s, reachable time 0ms, retrans time 0ms
          source link-address option (1), length 8 (1): 00:00:00:00:00:01
            0x0000:  0000 0000 0001
          prefix info option (3), length 32 (4): aef0::/64, Flags [onlink, auto], valid time infinity, pref. time infinity
            0x0000:  40c0 ffff ffff ffff ffff 0000 0000 aef0
            0x0010:  0000 0000 0000 0000 0000 0000 0000
          rdnss option (25), length 24 (3):  lifetime 4294967295s, addr: aef0::11
            0x0000:  0000 ffff ffff aef0 0000 0000 0000 0000
            0x0010:  0000 0000 0011
          dnssl option (31), length 24 (3):  lifetime 4294967295s, domain(s): aa.bb.cc.
            0x0000:  0000 ffff ffff 0261 6102 6262 0263 6300
            0x0010:  0000 0000 0000
          route info option (24), length 16 (2):  aef1::/48, pref=high, lifetime=infinity
            0x0000:  3008 ffff ffff aef1 0000 0000 0000
          route info option (24), length 24 (3):  aef2::/96, pref=low, lifetime=infinity
            0x0000:  6018 ffff ffff aef2 0000 0000 0000 0000
            0x0010:  0000 0000 0000
Comment 6 errata-xmlrpc 2020-03-10 10:07:57 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, 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-2020:0750