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#1 Le 19/04/2020, à 12:09

clement.analogue

Routage aléatoire en IPv6

Bonjour,

Le routage est aléatoire chez moi en IPv6. Je n'arrive pas à identifier le problème. Quelqu'un à essayer un traceroute6 vers un de mes serveur (container LXD).

11  th2-dsl1-a1.fr.eu (2001:41d0::b76)  12.944 ms be45.th2-dsl1a-n93.fr.eu (2001:41d0::b72)  13.035 ms  13.103 ms
12  2001:41d0:fde0:80::30 (2001:41d0:fde0:80::30)  12.637 ms  12.595 ms  12.549 ms
13  2001:41d0:fecf:8900:5ee2:8cff:fe99:f106 (2001:41d0:fecf:8900:5ee2:8cff:fe99:f106)  22.724 ms  22.759 ms  21.971 ms
14  2001:41d0:fecf:8900:5ee2:8cff:fe99:f106 (2001:41d0:fecf:8900:5ee2:8cff:fe99:f106)  3029.525 ms !H  3022.011 ms !H  3022.124 ms !H

mais ça passe parfois. La dernière IP est celle de mon routeur, un Zyxel VMG8823-B50B à l'interface bugguée comme pas possible. Quasi impossible à configurer. Mon FAI est OVH.

Depuis ce containeur, ça semble fonctionné

# traceroute6 2001:67c:1360:8001::2b
traceroute to 2001:67c:1360:8001::2b (2001:67c:1360:8001::2b) from 2001:41d0:fecf:8900:216:3eff:fe8a:e4a6, 30 hops max, 24 byte packets
 1  2001:41d0:fecf:8900:5ee2:8cff:fe99:f106 (2001:41d0:fecf:8900:5ee2:8cff:fe99:f106)  2.682 ms  0.918 ms  0.464 ms
 2  2001:41d0:fde0::10 (2001:41d0:fde0::10)  10.375 ms  9.303 ms  10.095 ms
 3  2001:41d0:fde0:80::31 (2001:41d0:fde0:80::31)  14.312 ms  9.677 ms  10.448 ms
 4  * * *
 5  he.par.franceix.net (2001:7f8:54::10)  10.384 ms  9.469 ms  9.675 ms
 6  100ge11-1.core1.lon2.he.net (2001:470:0:2ce::1)  20.373 ms  20.134 ms  41.108 ms
 7  100ge4-1.core1.lon3.he.net (2001:470:0:3ea::2)  20.268 ms  20.278 ms  21.119 ms
 8  annegrit.canonical.com (2001:67c:1360::7)  89.103 ms  89.439 ms  89.126 ms
 9  cactuar.canonical.com (2001:67c:1360:8001::2b)  87.616 ms  87.698 ms  88.203 ms

La configuration réseau du containeur, avec netplan

# cat /etc/netplan/50-cloud-init.yaml
network:
    version: 2
    ethernets:
        eth0:
            dhcp4: true
            nameservers:
                addresses: [192.168.1.11, 192.168.1.29]

Je ne sais pas comment il a choppé une IPv6

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.45  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 2001:41d0:fecf:8900:216:3eff:fe8a:e4a6  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::216:3eff:fe8a:e4a6  prefixlen 64  scopeid 0x20<link>
        ether 00:16:3e:8a:e4:a6  txqueuelen 1000  (Ethernet)
        RX packets 2405960257  bytes 2282269194099 (2.2 TB)
        RX errors 0  dropped 674723  overruns 0  frame 0
        TX packets 1829657657  bytes 2264846600441 (2.2 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 229023  bytes 56341056 (56.3 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 229023  bytes 56341056 (56.3 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
# route -6
Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
2001:41d0:fecf:8900::/64       [::]                       U    100 9    25 eth0
2001:41d0:fecf:8900::/64       [::]                       UAe  256 1     0 eth0
fe80::/64                      [::]                       U    256 1     0 eth0
[::]/0                         fe80::5ee2:8cff:fe99:f106  UG   100 9 13104 eth0
ip6-localhost/128              [::]                       Un   0   2     0 lo
tor.forumanalogue.fr/128       [::]                       Un   0   10  4438 eth0
fe80::216:3eff:fe8a:e4a6/128   [::]                       Un   0   4147141 eth0
ip6-mcastprefix/8              [::]                       U    256 9157425 eth0
[::]/0                         [::]                       !n   -1  1     1 lo

Sur le serveur, à l'ancienne

% cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto enp10s0
iface enp10s0 inet manual

auto xenbr0
iface xenbr0 inet static
        address 192.168.1.10
        netmask 255.255.255.0
        gateway 192.168.1.1
        bridge-ports enp10s0
        bridge_stp on
        bridge_maxwait 0
        bridge_fd 0

Pareil, je ne sais pas comment le serveur à récupérer des IPv6.

% ifconfig
enp10s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::325a:3aff:fe7f:843f  prefixlen 64  scopeid 0x20<link>
        ether 30:5a:3a:7f:84:3f  txqueuelen 1000  (Ethernet)
        RX packets 2659908723  bytes 2358003270936 (2.3 TB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2685754119  bytes 2500413071945 (2.5 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 34708508  bytes 8222548101 (8.2 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 34708508  bytes 8222548101 (8.2 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth01895458: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether e2:a9:fe:0a:c8:cd  txqueuelen 1000  (Ethernet)
        RX packets 1754539  bytes 348902146 (348.9 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2426168  bytes 294717765 (294.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth32577954: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 72:d7:c5:32:e5:0e  txqueuelen 1000  (Ethernet)
        RX packets 494557  bytes 77058878 (77.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2684601  bytes 264044615 (264.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth48500450: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether aa:3b:fb:15:a3:c5  txqueuelen 1000  (Ethernet)
        RX packets 258819  bytes 27572129 (27.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2446220  bytes 238423490 (238.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth19d5dfe8: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 5a:a3:75:82:da:b2  txqueuelen 1000  (Ethernet)
        RX packets 158807  bytes 279525155 (279.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 729435  bytes 462474234 (462.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth21974f8c: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 3e:c1:b9:26:19:70  txqueuelen 1000  (Ethernet)
        RX packets 5910245  bytes 6651038200 (6.6 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 11218527  bytes 11249176973 (11.2 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth251fc275: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether f6:87:ac:45:ae:0c  txqueuelen 1000  (Ethernet)
        RX packets 541485  bytes 80435050 (80.4 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2744066  bytes 268775122 (268.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth2f6307bf: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 42:19:00:5f:56:ad  txqueuelen 1000  (Ethernet)
        RX packets 26319084  bytes 26167084906 (26.1 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 25773488  bytes 3721991106 (3.7 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth37fba5cd: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 1a:33:bc:fb:2a:f2  txqueuelen 1000  (Ethernet)
        RX packets 8227775  bytes 1444393182 (1.4 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 11944904  bytes 3603367720 (3.6 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth55a26585: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 62:e1:1e:6f:8d:98  txqueuelen 1000  (Ethernet)
        RX packets 1305341  bytes 7876079695 (7.8 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1703424  bytes 139116631 (139.1 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth8d677ac8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 0e:f6:46:78:f0:46  txqueuelen 1000  (Ethernet)
        RX packets 6091011  bytes 924876265 (924.8 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7841957  bytes 939828196 (939.8 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethb172ffe7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether f6:38:6c:50:7e:29  txqueuelen 1000  (Ethernet)
        RX packets 22786112  bytes 2797448230 (2.7 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 26391304  bytes 10770083881 (10.7 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethb8437e04: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether fe:a6:86:64:a9:d2  txqueuelen 1000  (Ethernet)
        RX packets 509777  bytes 76470565 (76.4 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2700757  bytes 255345909 (255.3 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethbb9c903b: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 92:10:31:fd:34:b8  txqueuelen 1000  (Ethernet)
        RX packets 1830881387  bytes 2266470316372 (2.2 TB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2407679485  bytes 2283913652174 (2.2 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethc0fb6a90: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 76:22:c4:db:9b:34  txqueuelen 1000  (Ethernet)
        RX packets 651364  bytes 1452544523 (1.4 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3127781  bytes 780003285 (780.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethd9694139: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether b2:20:95:f7:17:a3  txqueuelen 1000  (Ethernet)
        RX packets 513782  bytes 84087826 (84.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2704450  bytes 261505282 (261.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethd1754acb: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 26:1e:0e:1e:f0:d1  txqueuelen 1000  (Ethernet)
        RX packets 853417  bytes 140594674 (140.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3095450  bytes 472437784 (472.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethdb30abd2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether ca:56:f5:54:76:73  txqueuelen 1000  (Ethernet)
        RX packets 228032  bytes 20040219 (20.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2417106  bytes 235183919 (235.1 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethdc70a424: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 5e:cd:9f:b2:59:11  txqueuelen 1000  (Ethernet)
        RX packets 10657833  bytes 31037764321 (31.0 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 19105558  bytes 23084817021 (23.0 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethec10611f: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 42:16:1c:21:43:43  txqueuelen 1000  (Ethernet)
        RX packets 615100  bytes 112781008 (112.7 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2794143  bytes 326186270 (326.1 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

xenbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.10  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 2001:41d0:fecf:8900:e8c7:e967:8e21:9f41  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:40b1:ba57:9df0:6a4c  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:325a:3aff:fe7f:843f  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:b0fc:ccfe:3cfb:e112  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:9c70:8f78:2b4e:748  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:6da7:f125:240a:b262  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:424:a91a:57d3:c01c  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:9813:71cb:d1c5:42b  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:cf6:46ff:fe78:f046  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:ddfc:94fa:2bca:d24b  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:4041:4b44:2236:513b  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:5d29:4697:1671:78ec  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:6d12:100f:d5de:e46  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:57f:4303:e6a9:b2cf  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:7dfc:825f:2166:a9fe  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::325a:3aff:fe7f:843f  prefixlen 64  scopeid 0x20<link>
        inet6 2001:41d0:fecf:8900:e8d9:226b:b9ce:e06b  prefixlen 64  scopeid 0x0<global>
        inet6 2001:41d0:fecf:8900:e8d9:226b:b9ce:e06b  prefixlen 64  scopeid 0x0<global>
        ether 0e:f6:46:78:f0:46  txqueuelen 1000  (Ethernet)
        RX packets 81819186  bytes 49190156351 (49.1 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 67061836  bytes 143719960482 (143.7 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
% route -6
Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
localhost/128                  [::]                       U    256 1     0 lo
2001:41d0:fecf:8900::/64       [::]                       UAe  256 9   156 xenbr0
fe80::/64                      [::]                       U    256 1     0 enp10s0
fe80::/64                      [::]                       U    256 1     0 xenbr0
[::]/0                         fe80::5ee2:8cff:fe99:f106  UGDAe 1024 9 14884 xenbr0
localhost/128                  [::]                       Un   0   10 34018 lo
2001:41d0:fecf:8900:424:a91a:57d3:c01c/128 [::]                       Un   0   9   251 xenbr0
2001:41d0:fecf:8900:57f:4303:e6a9:b2cf/128 [::]                       Un   0   4     4 xenbr0
2001:41d0:fecf:8900:cf6:46ff:fe78:f046/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:325a:3aff:fe7f:843f/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:4041:4b44:2236:513b/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:40b1:ba57:9df0:6a4c/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:5d29:4697:1671:78ec/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:6d12:100f:d5de:e46/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:6da7:f125:240a:b262/128 [::]                       Un   0   9    12 xenbr0
2001:41d0:fecf:8900:7dfc:825f:2166:a9fe/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:9813:71cb:d1c5:42b/128 [::]                       Un   0   6   184 xenbr0
2001:41d0:fecf:8900:9c70:8f78:2b4e:748/128 [::]                       Un   0   6   106 xenbr0
2001:41d0:fecf:8900:b0fc:ccfe:3cfb:e112/128 [::]                       Un   0   6    12 xenbr0
2001:41d0:fecf:8900:ddfc:94fa:2bca:d24b/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:e8c7:e967:8e21:9f41/128 [::]                       Un   0   2     0 xenbr0
2001:41d0:fecf:8900:e8d9:226b:b9ce:e06b/128 [::]                       Un   0   10  2489 xenbr0
fe80::325a:3aff:fe7f:843f/128  [::]                       Un   0   2     0 enp10s0
fe80::325a:3aff:fe7f:843f/128  [::]                       Un   0   10  6681 xenbr0
ff00::/8                       [::]                       U    256 9 36127 enp10s0
ff00::/8                       [::]                       U    256 9179626 xenbr0
[::]/0                         [::]                       !n   -1  1     1 lo

Est-ce que le problème de routage vient du containeur LXD, de mon serveur, du routeur, ou du FAI ? Merci d'avance pour votre aide smile


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