Bug 1575944
| Summary: | NetworkManager fails to configure IPV6 on network bridge | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Norbert Jurkeit <norbert.jurkeit> | ||||
| Component: | NetworkManager | Assignee: | Beniamino Galvani <bgalvani> | ||||
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 28 | CC: | alexl, bgalvani, dcbw, fgiudici, john.j5live, lkundrak, mclasen, rhughes, rstrode, sandmann, thaller | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | |||||||
| : | 1576254 (view as bug list) | Environment: | |||||
| Last Closed: | 2019-05-28 20:20:06 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: | 1576254 | ||||||
| Attachments: |
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Created attachment 1433533 [details]
[PATCH] device: start IP configuration when master carrier goes up
(In reply to Beniamino Galvani from comment #1) > Created attachment 1433533 [details] > [PATCH] device: start IP configuration when master carrier goes up lgtm Applied to master: https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=1829126f3abe8af591af2d0906f04b3dae01743e and nm-1-10. After upgrading NetworkManager from version 1.10.6 to 1.10.8 IPv6 addresses are assigned correctly to the bridge and output of "route -A inet6" also looks reasonable. However since the upgrade done yesterday (from updates-testing) it happened several times that IPv6 did not work though, i.e. "ping -6 IPv6-capable-site" hangs forever and indicates 100% packet loss after ^C, while "ping -4 ..." works. It just came to my mind that this might be a firewall problem and indeed after "systemctl stop firewalld" IPv6 immediately started to work and continued to work after "systemctl start firewalld". Normally I use a custom firewall configuration but the issue also has occured with default settings. (In reply to Norbert Jurkeit from comment #4) > After upgrading NetworkManager from version 1.10.6 to 1.10.8 IPv6 addresses > are assigned correctly to the bridge and output of "route -A inet6" also > looks reasonable. Yes, the fix is included in NetworkManager-1.10.8-1.fc28. > However since the upgrade done yesterday (from updates-testing) it happened > several times that IPv6 did not work though, i.e. "ping -6 > IPv6-capable-site" hangs forever and indicates 100% packet loss after ^C, > while "ping -4 ..." works. It just came to my mind that this might be a > firewall problem and indeed after "systemctl stop firewalld" IPv6 > immediately started to work and continued to work after "systemctl start > firewalld". This is probably the same issue of bug 1575431. Thanks for the hint! I just changed IPv6_rpfilter to "no" in /etc/firewalld/firewalld.conf as proposed in bug 1575431 and that seems to fix the issue also for me. Additional info: I have 2 other Fedora 28 computers in the same LAN, but with ordinary network configuration (because I don't run VMs on them) and haven't encountered any IPv6 connectivity issues there. So even if NetworkManager is not the root cause the bridge configuration seems to induce the issue. This message is a reminder that Fedora 28 is nearing its end of life. On 2019-May-28 Fedora will stop maintaining and issuing updates for Fedora 28. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '28'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 28 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. Fedora 28 changed to end-of-life (EOL) status on 2019-05-28. Fedora 28 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
To allow virtual machines to access the internet, I have created a bridge on my host computer. For use by the host itself, the bridge is set up to have a private IPv4 address (which is converted to an external address via NAT in my home router), a static private IPv6 address for local communication and a dynamic IPv6 address obtained via SLAAC for internet access. This setup has worked well with Fedora 26 and 27, but with Fedora 28 the bridge device does not get any IPv6 assigned, not even a link-local one: $ ifconfig bridge0 bridge0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.11 netmask 255.255.255.0 broadcast 192.168.0.255 ether 00:25:22:06:b2:1c txqueuelen 1000 (Ethernet) RX packets 4118 bytes 3503462 (3.3 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 3613 bytes 448237 (437.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 Contents of /etc/sysconfig/network-scripts/ifcfg-bridge0: STP=no BRIDGING_OPTS=multicast_snooping=0 TYPE=Bridge PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=none IPADDR=192.168.0.11 PREFIX=24 GATEWAY=192.168.0.1 DNS1=192.168.0.1 DEFROUTE=yes IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6ADDR=fd89:...:11/64 (truncated) IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no IPV6_PRIVACY=no IPV6_ADDR_GEN_MODE=stable-privacy NAME=bridge0 UUID=07f3c47c-0f92-41cc-ba84-34e4c8f02ab8 DEVICE=bridge0 ONBOOT=yes Static and link-local addresses are assigned correctly with IPV6_AUTOCONF=no, but then of course the dynamic address for internet access is missing. The issue does not occur on simple Ethernet interfaces without bridge.