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Bug 1686131 - The ipv6 default route is gone
Summary: The ipv6 default route is gone
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: NetworkManager
Version: 29
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Lubomir Rintel
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2019-03-06 19:31 UTC by Pete Zaitcev
Modified: 2019-03-09 16:36 UTC (History)
10 users (show)

Fixed In Version:
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Description Pete Zaitcev 2019-03-06 19:31:48 UTC
Description of problem:

No default route, ipv6 connectivity is completely off.

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


How reproducible:


Steps to Reproduce:
1. Attach to network with IPv6 router

Actual results:

No default route

Expected results:

Default route

Additional info:

This appears to be different from other bugs we had about it.

Bug 1575431 was a problem in firewalld, not NM. There's no firewalld
on this machine. ICMPv6 is allowed through. Anyway, that one was resolved.

Bug 1585323 is in the part responsible for DNS, not routing.

Bug 1574242 may be relevant, at least some comments are, about the
zero lifetime:

[root@chihiro zaitcev]# rdisc6 enp4s0
Soliciting ff02::2 (ff02::2) on enp4s0...

Hop limit                 :           64 (      0x40)
Stateful address conf.    :          Yes
Stateful other conf.      :          Yes
Mobile home agent         :           No
Router preference         :       medium
Neighbor discovery proxy  :           No
Router lifetime           :            0 (0x00000000) seconds
Reachable time            :  unspecified (0x00000000)
Retransmit time           :  unspecified (0x00000000)
 Prefix                   : 2600:1700:1d1:f0c0::/64
  On-link                 :          Yes
  Autonomous address conf.:          Yes
  Valid time              :      2592000 (0x00278d00) seconds
  Pref. time              :       604800 (0x00093a80) seconds
 Route                    : 2600:1700:1d1:f0c0::/64
  Route preference        :          low
  Route lifetime          :            0 (0x00000000) seconds
 Recursive DNS server     : 2600:1700:1d1:f0c0::1
  DNS server lifetime     :          600 (0x00000258) seconds
 DNS search list          :
  DNS search list lifetime:          600 (0x00000258) seconds
 MTU                      :         1500 bytes (valid)
 Source link-layer address: FC:51:A4:2E:A1:10
 from fe80::fe51:a4ff:fe2e:a110
[root@chihiro zaitcev]# 

Two things though:
1. This used to work before Fedora 29
2. The ISP isn't going to update the firmware

Comment 1 Beniamino Galvani 2019-03-09 16:36:24 UTC
Please enable debug logging (see ), reboot, reproduce the issue and the attach NM logs (journalctl -u NetworkManager -b). Thanks.

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