O IPv6 funciona muito bem na maior parte do tempo, mas à meia-noite do dia a dia, nossa rede é cortada pela escola para nos forçar a ir para a cama e recuperada no dia seguinte às 6h. Isso é feito, na minha opinião, apenas desligando o interruptor do dormitório.
E após o corte no dia seguinte pela manhã, o IPv4 ainda funciona bem, mas meu IPv6 não pode se conectar a nenhum host, exceto os colegas de quarto. Se eu reiniciar a interface por /etc/init.d/net.enp4s0 restart , tudo funcionará novamente.
Aqui está a topologia:
My machine \
room's switch - dorm's switch - dorm's gateway
Roommate 's machine /
Isto é o que parece antes de reiniciar:
Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256 expires 3584sec
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1784sec
Riaqn-Laptop ~ # ip -6 neigh
2001:da8:8000:e0b1::15f7 dev enp4s0 FAILED
2001:da8:8000:e0b1::3b4e:1660 dev enp4s0 FAILED
fe80::f928:6537:a988:7b80 dev enp4s0 FAILED
2001:da8:8000:e0b1::fe71 dev enp4s0 FAILED
2001:da8:8000:e0b1::a113 dev enp4s0 FAILED
2001:da8:8000:e0b1::58aa dev enp4s0 lladdr b8:88:e3:8f:30:7e STALE
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router STALE
2001:da8:8000:e0b1::15f8 dev enp4s0 FAILED
2001:da8:8000:e0b1::569e dev enp4s0 lladdr dc:0e:a1:72:9e:8b STALE
fe80::c9fe:6d0e:9295:75a dev enp4s0 lladdr dc:0e:a1:72:9e:8b STALE
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5001ms
Riaqn-Laptop ~ # ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:da8:8000:e0b1::cdf4/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::21b:24ff:fed5:f438/64 scope link
valid_lft forever preferred_lft forever
4: enp0s29f7u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::8eae:4bff:fe00:4e82/64 scope link
valid_lft forever preferred_lft forever
Riaqn-Laptop ~ # rdisc6 enp4s0
Soliciting ff02::2 (ff02::2) on enp4s0...
Timed out.
Timed out.
Timed out.
No response.
É assim que parece depois de reiniciar a interface
Riaqn-Laptop ~ # ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:da8:8000:e0b1::9b59/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::21b:24ff:fed5:f438/64 scope link
valid_lft forever preferred_lft forever
4: enp0s29f7u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::8eae:4bff:fe00:4e82/64 scope link
valid_lft forever preferred_lft forever
Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256 expires 3599sec
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1799sec
Riaqn-Laptop ~ # ip -6 neigh
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router REACHABLE
Riaqn-Laptop ~ # 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 : 1800 (0x00000708) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
Source link-layer address: 00:12:CF:5F:C0:C0
Prefix : 2001:da8:8000:e0b1::/64
On-link : Yes
Autonomous address conf.: No
Valid time : 3600 (0x00000e10) seconds
Pref. time : 1800 (0x00000708) seconds
from fe80::212:cfff:fe5f:c0c0
^C
O endereço IPv6 é atribuído pelo DHCPv6, é assim que o dhclient funciona:
Riaqn-Laptop ~ # dhclient -6 -v -e IF_METRIC=2 -1 -pf /var/run/dhclient-enp4s0.pid enp4s0
Internet Systems Consortium DHCP Client 4.3.1 Gentoo-r0
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Waiting 5 seconds for IPv6 to really come ready
Listening on Socket/enp4s0
Sending on Socket/enp4s0
Created duid Riaqn-Laptop ~ # ping6 ipv6.google.com
PING ipv6.google.com(hkg03s16-in-x08.1e100.net) 56 data bytes
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=1 ttl=43 time=340 ms
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=2 ttl=43 time=340 ms
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=3 ttl=43 time=339 ms
^C
--- ipv6.google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 339.998/340.070/340.141/0.675 ms
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3007ms
Riaqn-Laptop ~ # ndisc6 fe80::212:cfff:fe5f:c0c0 enp4s0
Soliciting fe80::212:cfff:fe5f:c0c0 (fe80::212:cfff:fe5f:c0c0) on enp4s0...
Timed out.
Timed out.
Timed out.
No response.
Riaqn-Laptop ~ # ip -6 neigh
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router REACHABLE
fe80::c9fe:6d0e:9295:75a dev enp4s0 FAILED
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4000ms
Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1764sec
0 My machine \
room's switch - dorm's switch - dorm's gateway
Roommate 's machine /
1Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256 expires 3584sec
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1784sec
Riaqn-Laptop ~ # ip -6 neigh
2001:da8:8000:e0b1::15f7 dev enp4s0 FAILED
2001:da8:8000:e0b1::3b4e:1660 dev enp4s0 FAILED
fe80::f928:6537:a988:7b80 dev enp4s0 FAILED
2001:da8:8000:e0b1::fe71 dev enp4s0 FAILED
2001:da8:8000:e0b1::a113 dev enp4s0 FAILED
2001:da8:8000:e0b1::58aa dev enp4s0 lladdr b8:88:e3:8f:30:7e STALE
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router STALE
2001:da8:8000:e0b1::15f8 dev enp4s0 FAILED
2001:da8:8000:e0b1::569e dev enp4s0 lladdr dc:0e:a1:72:9e:8b STALE
fe80::c9fe:6d0e:9295:75a dev enp4s0 lladdr dc:0e:a1:72:9e:8b STALE
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5001ms
Riaqn-Laptop ~ # ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:da8:8000:e0b1::cdf4/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::21b:24ff:fed5:f438/64 scope link
valid_lft forever preferred_lft forever
4: enp0s29f7u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::8eae:4bff:fe00:4e82/64 scope link
valid_lft forever preferred_lft forever
Riaqn-Laptop ~ # rdisc6 enp4s0
Soliciting ff02::2 (ff02::2) on enp4s0...
Timed out.
Timed out.
Timed out.
No response.
0Riaqn-Laptop ~ # ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:da8:8000:e0b1::9b59/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::21b:24ff:fed5:f438/64 scope link
valid_lft forever preferred_lft forever
4: enp0s29f7u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::8eae:4bff:fe00:4e82/64 scope link
valid_lft forever preferred_lft forever
Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256 expires 3599sec
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1799sec
Riaqn-Laptop ~ # ip -6 neigh
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router REACHABLE
Riaqn-Laptop ~ # 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 : 1800 (0x00000708) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
Source link-layer address: 00:12:CF:5F:C0:C0
Prefix : 2001:da8:8000:e0b1::/64
On-link : Yes
Autonomous address conf.: No
Valid time : 3600 (0x00000e10) seconds
Pref. time : 1800 (0x00000708) seconds
from fe80::212:cfff:fe5f:c0c0
^C
14345Riaqn-Laptop ~ # dhclient -6 -v -e IF_METRIC=2 -1 -pf /var/run/dhclient-enp4s0.pid enp4s0
Internet Systems Consortium DHCP Client 4.3.1 Gentoo-r0
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Waiting 5 seconds for IPv6 to really come ready
Listening on Socket/enp4s0
Sending on Socket/enp4s0
Created duid Riaqn-Laptop ~ # ping6 ipv6.google.com
PING ipv6.google.com(hkg03s16-in-x08.1e100.net) 56 data bytes
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=1 ttl=43 time=340 ms
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=2 ttl=43 time=340 ms
64 bytes from hkg03s16-in-x08.1e100.net: icmp_seq=3 ttl=43 time=339 ms
^C
--- ipv6.google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 339.998/340.070/340.141/0.675 ms
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3007ms
Riaqn-Laptop ~ # ndisc6 fe80::212:cfff:fe5f:c0c0 enp4s0
Soliciting fe80::212:cfff:fe5f:c0c0 (fe80::212:cfff:fe5f:c0c0) on enp4s0...
Timed out.
Timed out.
Timed out.
No response.
Riaqn-Laptop ~ # ip -6 neigh
fe80::212:cfff:fe5f:c0c0 dev enp4s0 lladdr 00:12:cf:5f:c0:c0 router REACHABLE
fe80::c9fe:6d0e:9295:75a dev enp4s0 FAILED
Riaqn-Laptop ~ # ping6 -I enp4s0 fe80::212:cfff:fe5f:c0c0
PING fe80::212:cfff:fe5f:c0c0(fe80::212:cfff:fe5f:c0c0) from fe80::21b:24ff:fed5:f438 enp4s0: 56 data bytes
^C
--- fe80::212:cfff:fe5f:c0c0 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4000ms
Riaqn-Laptop ~ # ip -6 route
2001:da8:8000:e0b1::/64 dev enp4s0 proto kernel metric 256
fe80::/64 dev enp0s29f7u2u4 proto kernel metric 256
fe80::/64 dev enp4s0 proto kernel metric 256
default via fe80::212:cfff:fe5f:c0c0 dev enp4s0 proto ra metric 1024 expires 1764sec
0%pre%1%pre%0%pre%14345%pre%03$548.
PRC: Soliciting for leases (INIT).
XMT: Forming Solicit, 0 ms elapsed.
XMT: X-- IA_NA 24:d5:f4:38
XMT: | X-- Request renew in +3600
XMT: | X-- Request rebind in +5400
XMT: Solicit on enp4s0, interval 1050ms.
RCV: Advertise message on enp4s0 from fe80::212:cfff:fe5f:c0c0.
RCV: X-- Preference 10.
RCV: X-- IA_NA 24:d5:f4:38
RCV: | X-- starts 1419829253
RCV: | X-- t1 - renew +345600
RCV: | X-- t2 - rebind +552960
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
RCV: | | | X-- Preferred lifetime 691200.
RCV: | | | X-- Max lifetime 1036800.
RCV: X-- Server ID: 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00
RCV: Advertisement recorded.
PRC: Selecting best advertised lease.
PRC: Considering best lease.
PRC: X-- Initial candidate 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00 (s: 154, p: 10).
XMT: Forming Request, 0 ms elapsed.
XMT: X-- IA_NA 24:d5:f4:38
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_NA appended.
XMT: Request on enp4s0, interval 1000ms.
RCV: Reply message on enp4s0 from fe80::212:cfff:fe5f:c0c0.
RCV: X-- IA_NA 24:d5:f4:38
RCV: | X-- starts 1419829254
RCV: | X-- t1 - renew +345600
RCV: | X-- t2 - rebind +552960
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
RCV: | | | X-- Preferred lifetime 691200.
RCV: | | | X-- Max lifetime 1036800.
RCV: X-- Server ID: 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00
PRC: Bound to lease 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00.
03$548.
PRC: Soliciting for leases (INIT).
XMT: Forming Solicit, 0 ms elapsed.
XMT: X-- IA_NA 24:d5:f4:38
XMT: | X-- Request renew in +3600
XMT: | X-- Request rebind in +5400
XMT: Solicit on enp4s0, interval 1050ms.
RCV: Advertise message on enp4s0 from fe80::212:cfff:fe5f:c0c0.
RCV: X-- Preference 10.
RCV: X-- IA_NA 24:d5:f4:38
RCV: | X-- starts 1419829253
RCV: | X-- t1 - renew +345600
RCV: | X-- t2 - rebind +552960
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
RCV: | | | X-- Preferred lifetime 691200.
RCV: | | | X-- Max lifetime 1036800.
RCV: X-- Server ID: 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00
RCV: Advertisement recorded.
PRC: Selecting best advertised lease.
PRC: Considering best lease.
PRC: X-- Initial candidate 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00 (s: 154, p: 10).
XMT: Forming Request, 0 ms elapsed.
XMT: X-- IA_NA 24:d5:f4:38
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_NA appended.
XMT: Request on enp4s0, interval 1000ms.
RCV: Reply message on enp4s0 from fe80::212:cfff:fe5f:c0c0.
RCV: X-- IA_NA 24:d5:f4:38
RCV: | X-- starts 1419829254
RCV: | X-- t1 - renew +345600
RCV: | X-- t2 - rebind +552960
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:da8:8000:e0b1::b5b0
RCV: | | | X-- Preferred lifetime 691200.
RCV: | | | X-- Max lifetime 1036800.
RCV: X-- Server ID: 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00
PRC: Bound to lease 00:01:00:00:53:7c:9e:c4:00:15:5d:7f:03:00.
[Atualizar]
Acabei de descobrir que o problema pode não estar relacionado com o corte da rede. Esta manhã eu reiniciei a interface para fornecer as informações acima, e agora, depois de 9 horas, já está inacessível sem estar cortando, e de uma maneira mais interessante: eu posso pingar ipv6.google.com , mas não consigo pingar o roteador.
Ok, eu pedi a um amigo que usava o windows 7 em seu computador, que mantivesse sua máquina ligada da meia-noite até a manhã e, sim, o IPv6 dele também está quebrado.
Então eu acho que isso é um problema de upstream e não pode ser corrigido sozinho. Felizmente, eles fornecem um túnel isatap para me conectar ao IPv6 por meio de um túnel IPv4, que funciona bem mesmo depois de várias horas.
Acho que meu problema foi resolvido, obrigado pela sua ajuda!