Public bug reported:
Environment:
-------------------
Ubuntu Server 15.04
Release 20070815-1.4
Hello guys,
It is impossible to ping my own system with ICMPv6, although everything
seems to be correctly configured:
Tap Interface:
[CODE]root@MSI-GE60-Ubuntu:/usr/share/applications# ifconfig tap0
tap0
Link encap:Ethernet HWaddr 5e:22:3a:fd:01:d6
inet addr:192.168.137.1 Bcast:192.168.137.255 Mask:255.255.255.0
inet6 addr: fc00:137::1/64 Scope:Global
UP BROADCAST MULTICAST MTU:1500 Metric:1[/CODE]
Firewall:
[CODE]-A ufw6-before-input -p icmpv6 --icmpv6-type echo-request -j ACCEPT[/CODE]
Routing Table:
[CODE]root@MSI-GE60-Ubuntu:/usr/share/applications# route -A inet6
Kernel IPv6 routing table
Destination Next Hop Flag Met Ref Use If
fc00::/64 :: U 256 0 0
virbr0
fc00:127::/64 :: U 256 0 0 tap1
fc00:137::/64 :: U 256 0 0 tap0
fc01::/64 :: U 256 0 0
virbr1
fe80::/64 :: U 256 0 0
vmnet1
fe80::/64 :: U 256 0 0
vmnet2
fe80::/64 :: U 256 0 0
vmnet3
fe80::/64 :: U 256 0 0
vmnet4
fe80::/64 :: U 256 0 0
vmnet8
fe80::/64 :: U 256 0 0 wlan0
::/0 :: !n -1 1 14134 lo
::1/128 :: Un 0 9 304
lo[/CODE]
But it is impossible to ping tap0:
[CODE]root@MSI-GE60-Ubuntu:/usr/share/applications# ping6 FC00:137::1
PING FC00:137::1(fc00:137::1) 56 data bytes
>From ::1 icmp_seq=1 Destination unreachable: Address unreachable
>From ::1 icmp_seq=2 Destination unreachable: Address unreachable
>From ::1 icmp_seq=3 Destination unreachable: Address unreachable[/CODE]
while at the time I can ping l0:
[CODE]root@MSI-GE60-Ubuntu:/usr/share/applications# ping6 ::1
PING ::1(::1) 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.040 ms
64 bytes from ::1: icmp_seq=2 ttl=64 time=0.041 ms[/CODE]
Maybe someone has a clue or know the difference between U flag and Un
flag.
** Affects: uml-utilities (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1454190
Title:
IPv6 Connectivity Issue
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