[OCPBUGS-54229] Bond-CNI pod failed to recover IPv6 address config after bond interface restart - Red Hat Issue Tracker

Type: Bug
Resolution: Unresolved
Priority: Undefined
Fix Version/s: None
Affects Version/s: 4.19
Component/s: Networking / multus
Labels:
- Telco-RDS
- Telco:Core

Regression:
None
Sprint:
CNF Network Sprint 268, CNF Sprint 269
sprint_count:
2
Blocked:
False
Blocked Reason:

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Description of problem:

After restarting (down/up) bonded interface for the bond-cni pod, the net3 ipv6 configuration was lost

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

    4.19.0-ec.3

How reproducible:

    always

Steps to Reproduce:

    1. Create pod-level bond deployment (it has to be privileged to be possible to shut down pod network interface) 

    2. verify original net3 configuration
[kni@registry ~]$ oc -n rds-bonded-sriov-wlkd rsh rdscore-pod-level-bond-two-7f67ddc8c8-6bjzg
sh-5.1# 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: gre0@NONE: <NOARP> mtu 1476 qdisc noop state DOWN group default qlen 1000
    link/gre 0.0.0.0 brd 0.0.0.0
3: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1462 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
5: eth0@if90: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8900 qdisc noqueue state UP group default 
    link/ether 0a:58:0a:82:02:2c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.130.2.44/23 brd 10.130.3.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd01:0:0:7::2c/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::858:aff:fe82:22c/64 scope link 
       valid_lft forever preferred_lft forever
6: net3: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    inet 10.18.93.92/26 brd 10.18.93.127 scope global net3
       valid_lft forever preferred_lft forever
    inet6 2620:52:0:15d::62/122 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::432:1cff:fe9e:78ed/64 scope link 
       valid_lft forever preferred_lft forever
34: net1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    altname enp138s0f0v11
48: net2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether ea:8c:14:19:fe:1e brd ff:ff:ff:ff:ff:ff
    altname enp138s0f1v10

     3. take net3 interface down
sh-5.1# ip link set dev net3 down

     4. verify net3 interface config
sh-5.1# 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: gre0@NONE: <NOARP> mtu 1476 qdisc noop state DOWN group default qlen 1000
    link/gre 0.0.0.0 brd 0.0.0.0
3: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1462 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
5: eth0@if90: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8900 qdisc noqueue state UP group default 
    link/ether 0a:58:0a:82:02:2c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.130.2.44/23 brd 10.130.3.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd01:0:0:7::2c/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::858:aff:fe82:22c/64 scope link 
       valid_lft forever preferred_lft forever
6: net3: <BROADCAST,MULTICAST,MASTER> mtu 9000 qdisc noqueue state DOWN group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    inet 10.18.93.92/26 brd 10.18.93.127 scope global net3
       valid_lft forever preferred_lft forever
34: net1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    altname enp138s0f0v11
48: net2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether ea:8c:14:19:fe:1e brd ff:ff:ff:ff:ff:ff
    altname enp138s0f1v10

    5. change net3 interface state to up
sh-5.1# ip link set dev net3 up  
sh-5.1# 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: gre0@NONE: <NOARP> mtu 1476 qdisc noop state DOWN group default qlen 1000
    link/gre 0.0.0.0 brd 0.0.0.0
3: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1462 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
5: eth0@if90: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8900 qdisc noqueue state UP group default 
    link/ether 0a:58:0a:82:02:2c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.130.2.44/23 brd 10.130.3.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd01:0:0:7::2c/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::858:aff:fe82:22c/64 scope link 
       valid_lft forever preferred_lft forever
6: net3: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    inet 10.18.93.92/26 brd 10.18.93.127 scope global net3
       valid_lft forever preferred_lft forever
    inet6 fe80::432:1cff:fe9e:78ed/64 scope link tentative 
       valid_lft forever preferred_lft forever
34: net1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether 06:32:1c:9e:78:ed brd ff:ff:ff:ff:ff:ff
    altname enp138s0f0v11
48: net2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master net3 state UP group default qlen 1000
    link/ether ea:8c:14:19:fe:1e brd ff:ff:ff:ff:ff:ff
    altname enp138s0f1v10

Actual results:

originally configured ipv6 address 2620:52:0:15d::62/122 was lost

Expected results:

    ipv6 address has to be configured for the net3 interface after the net3 interface restart

Additional info:

    the IPv6 address disappeared when we took the interface down. So, even before we return it to the 'up' state, it is already missing.

Assignee:: Marcelo Guerrero Viveros

Reporter:: Elena German

QA Contact:: Weibin Liang

Votes:: 0 Vote for this issue

Watchers:: 5 Start watching this issue

Created:: 2025/03/25 7:55 PM

Updated:: 2025/03/31 2:19 PM

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