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

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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SFDC Cases Counter:
SFDC Cases Open:
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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.

Marcelo Guerrero Viveros added a comment - 2025/04/01 9:07 AM

Upstream pr got merged yesterday.

Are these tests intended to be for 4.14 as well? If so, let's do it for the bond-cni only. I will evaluate how easy is to backport this for the regular plugins. We can discuss this later.

Marcelo Guerrero Viveros added a comment - 2025/04/01 9:07 AM Upstream pr got merged yesterday. Are these tests intended to be for 4.14 as well? If so, let's do it for the bond-cni only. I will evaluate how easy is to backport this for the regular plugins. We can discuss this later.

Carlos Goncalves added a comment - 2025/04/01 7:47 AM

Thank you both!

Since this is a bug in the IPAM plugin that impacts all CNI plugins, and many are supported in OCP, it would be best to backport the fix to 4.14.z.
rh-ee-marguerr, WDYT?

Carlos Goncalves added a comment - 2025/04/01 7:47 AM Thank you both! Since this is a bug in the IPAM plugin that impacts all CNI plugins, and many are supported in OCP, it would be best to backport the fix to 4.14.z. rh-ee-marguerr , WDYT?

Marcelo Guerrero Viveros added a comment - 2025/03/31 1:54 PM

quay.io/marguerr/bond-ocpbugs-54229

Please give it a try. The env var you need to modify now is BOND_CNI_PLUGIN_IMAGE

Marcelo Guerrero Viveros added a comment - 2025/03/31 1:54 PM quay.io/marguerr/bond-ocpbugs-54229 Please give it a try. The env var you need to modify now is BOND_CNI_PLUGIN_IMAGE

Marcelo Guerrero Viveros added a comment - 2025/03/31 1:38 PM

No, that image was not for the bond-cni. I'll upload a custom one in a moment

Marcelo Guerrero Viveros added a comment - 2025/03/31 1:38 PM No, that image was not for the bond-cni. I'll upload a custom one in a moment

Federico Paolinelli made changes - 2025/03/31 12:45 PM

Rank

New: Ranked lower

Federico Paolinelli made changes - 2025/03/31 12:45 PM

Sprint

Original: CNF Network Sprint 268 [ 70280 ]

New: CNF Network Sprint 268, CNF Sprint 269 [ 70280, 70996 ]

Marcelo Guerrero Viveros added a comment - 2025/03/28 3:58 PM

upstream proposal https://github.com/containernetworking/plugins/pull/1155

elgerman, I have a custom image with the proposed fix quay.io/marguerr/plugins-ocpbugs-54229

You can test it by running:

oc scale deploy -n openshift-cluster-version cluster-version-operator --replicas=0

oc edit deploy -n openshift-network-operator network-operator

Here modify the env var CNI_PLUGINS_IMAGE, and then wait for the pods of the multus-additional-cni-plugins daemonset to be restarted

oc get pods -n openshift-multus

Marcelo Guerrero Viveros added a comment - 2025/03/28 3:58 PM upstream proposal https://github.com/containernetworking/plugins/pull/1155 elgerman , I have a custom image with the proposed fix quay.io/marguerr/plugins-ocpbugs-54229 You can test it by running: oc scale deploy -n openshift-cluster-version cluster-version-operator --replicas=0 oc edit deploy -n openshift-network-operator network-operator Here modify the env var CNI_PLUGINS_IMAGE, and then wait for the pods of the multus-additional-cni-plugins daemonset to be restarted oc get pods -n openshift-multus

Marcelo Guerrero Viveros added a comment - 2025/03/28 11:24 AM

elgerman, I was able to reproduce this behavior with other CNI plugins (vlan plugin). This is related to this sysctl parameter https://sysctl-explorer.net/net/ipv6/keep_addr_on_down/.

I think it makes sense to enable this parameter when the configuration is done through any of the IPAM CNIs. I will propose this in the upstream community.

A temporal solution is to chain the tuning CNI to enable this sysctl parameter. I will keep you posted. Please confirm from your side that you are able to reproduce this with a different CNI.

Marcelo Guerrero Viveros added a comment - 2025/03/28 11:24 AM elgerman , I was able to reproduce this behavior with other CNI plugins (vlan plugin). This is related to this sysctl parameter https://sysctl-explorer.net/net/ipv6/keep_addr_on_down/. I think it makes sense to enable this parameter when the configuration is done through any of the IPAM CNIs. I will propose this in the upstream community. A temporal solution is to chain the tuning CNI to enable this sysctl parameter. I will keep you posted. Please confirm from your side that you are able to reproduce this with a different CNI.

Elena German made changes - 2025/03/27 5:21 PM

Description

Original: Description of problem:
{code:none}
After restarting (down/up) bonded interface for the bond-cni pod, the net3 ipv6 configuration was lost {code}
Version-Release number of selected component (if applicable):
{code:none}
   4.19.0-ec.3{code}
How reproducible:
{code:none}
    always{code}
Steps to Reproduce:
{code:none}
    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
{code}
Actual results:
{code:none}
originally configured ipv6 address 2620:52:0:15d::62/122 was lost {code}
Expected results:
{code:none}
    ipv6 address has to be configured for the net3 interface after the net3 interface restart{code}
Additional info:
{code:none}
    {code}

New: Description of problem:
{code:none}
After restarting (down/up) bonded interface for the bond-cni pod, the net3 ipv6 configuration was lost {code}
Version-Release number of selected component (if applicable):
{code:none}
   4.19.0-ec.3{code}
How reproducible:
{code:none}
    always{code}
Steps to Reproduce:
{code:none}
    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
{code}
Actual results:
{code:none}
originally configured ipv6 address 2620:52:0:15d::62/122 was lost {code}
Expected results:
{code:none}
    ipv6 address has to be configured for the net3 interface after the net3 interface restart{code}
Additional info:
{code:none}
   the IPv6 address disappeared when we took the interface down. So, even before we return it to the 'up' state, it is already missing.{code}

Marcelo Guerrero Viveros made changes - 2025/03/27 9:45 AM

Status

Original: New [ 10016 ]

New: ASSIGNED [ 14452 ]

Marcelo Guerrero Viveros made changes - 2025/03/27 9:44 AM

Sprint

New: CNF Network Sprint 268 [ 70280 ]

Marcelo Guerrero Viveros made changes - 2025/03/27 9:43 AM

Assignee

Original: Peng Liu [ pliurh ]

New: Marcelo Guerrero Viveros [ rh-ee-marguerr ]

Carlos Goncalves made changes - 2025/03/27 9:01 AM

Link

New: This issue blocks CNF-15799 [ CNF-15799 ]

Elena German made changes - 2025/03/25 7:55 PM

QA Contact

New: Weibin Liang [ weliang1 ]

Elena German created issue - 2025/03/25 7:55 PM

Assignee:: Marcelo Guerrero Viveros

Reporter:: Elena German

QA Contact:: Weibin Liang

Votes:: 0 Vote for this issue

Watchers:: 6 Start watching this issue

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

Updated:: 2025/04/01 9:07 AM

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