Bug 589830
| Summary: | IPv6 link local connection gets an incomplete routing table if link-local address already assigned | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Scott Schmit <i.grok> |
| Component: | NetworkManager | Assignee: | Dan Williams <dcbw> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 12 | CC: | dcbw |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | 587836 | Environment: | |
| Last Closed: | 2010-05-26 19:47:08 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: | |||
I can't trigger this anymore with latest NM testing update (20100510 or later). It appears to have been fixed by bug 587836 since the check there ensures that multi-cast link-local addresses are not removed when NM takes the itnerface down, and ff02::1 is an MC Link-Local address. NetworkManager-0.8.1-0.1.git20100510.fc12 has been submitted as an update for Fedora 12. http://admin.fedoraproject.org/updates/NetworkManager-0.8.1-0.1.git20100510.fc12 If it's not fixed in that update, please re-open and we can debug further. Thanks! |
Description of problem: When bringing up an interface that already has an IPv6 link local address assigned, the routing table doesn't get configured correctly when connecting with IPv6 link-local only. Version-Release number of selected component (if applicable): NetworkManager-0.8.0-12.1.git20100504.fc12.x86_64 How reproducible: 100% Steps to Reproduce: 1. Connect to a connection that causes the IPv6 link-local address to be set 2. Disconnect 3. Connect to an IPv6 link-local only connection 6. ping6 -I <iface> ff02::1 Actual results: connect: Network is unreachable Expected results: ping6 should work Additional info: This works if I remove all the IPv6 addresses from the interface while it's down before bringing the interface back up. It also works if the IPv6 method is automatic; automatic, address only; or manual (on a network with RA + RDNSS, but not DHCPv6). Sample script: Start with nothing: # ip addr show dev wlan0 3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff # ip -6 route <empty> # route -A inet6 Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface localhost6.localdomain6/128 * U 0 6 1 lo Connect via connection with IPv6 set to link local (I kept IPv4 disabled for simplicity): # ip addr show dev wlan0 3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff inet6 fe80::xxxx:xxxx:xxxx:xxxx/64 scope link valid_lft forever preferred_lft forever # ip -6 route fe80::/64 dev wlan0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295 # route -A inet6 -n Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface fe80::/64 :: U 256 0 0 wlan0 ::1/128 :: U 0 6 1 lo fe80::xxxx:xxxx:xxxx:xxxx/128 :: U 0 0 1 lo ff02::1/128 ff02::1 UC 0 8 0 wlan0 ff00::/8 :: U 256 0 0 wlan0 <I hate that they don't match> disconnect # ip addr show dev wlan0 3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff inet6 fe80::xxxx:xxxx:xxxx:xxxx/64 scope link valid_lft forever preferred_lft forever # ip -6 route <empty> # route -A inet6 -n Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface ::1/128 :: U 0 6 1 lo fe80::xxxx:xxxx:xxxx:xxxx/128 :: U 0 0 1 lo Then connect via the same connection # ip addr show dev wlan0 3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff inet6 fe80::xxxx:xxxx:xxxx:xxxx/64 scope link valid_lft forever preferred_lft forever $ ip -6 route fe80::/64 dev wlan0 proto kernel metric 256 mtu 1280 advmss 1220 hoplimit 4294967295 $ ping6 ff02::1%wlan0 connect: Network is unreachable $ route -nA inet6 Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface fe80::/64 :: U 256 0 0 wlan0 ::1/128 :: U 0 8 1 lo fe80::xxxx:xxxx:xxxx:xxxx/128 :: U 0 0 1 lo