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Thread: Unable to ping / connect ipv6

  1. #1
    Join Date
    Apr 2017
    Location
    the Netherlands
    Posts
    25

    Question Unable to ping / connect ipv6

    I've tried a search on the forums, but wasn't able to find a solution for my issue. Hope I didn't miss any threads.

    I'm reinstalling/redesigning my local network and since I've got native ipv6 through my ISP, I figured I'd try to use as many internal services through ipv6, starting with ssh. However, I've hit a wall on the first hurdle.

    I'm running Tumbleweed on 2 Pi2's and an old laptop as servers. My workstation is a Garuda Linux/Windows 10 box (dual boot). The Tumbleweed boxes run a default install, wicked as the network manager.

    Weird stuff occurs:
    The Tumbleweed boxes can ping each other on their ipv6 ip. They can resolve ipv6 outside the lan, but not ping it. They also can't ping my workstation, neither when running Garuda or Windows 10.
    Code:
    # ping -6  opensuse.org
    PING opensuse.org(proxy-nue.opensuse.org (2001:67c:2178:8::16)) 56 data bytes
    --- opensuse.org ping statistics ---
    14 packets transmitted, 0 received, 100% packet loss, time 13304ms
    My workstation can resolve and ping outside the network (opensuse.org for instance), but not the three Tumbleweed servers:
    Code:
    PS C:\Users\user> ping -6 opensuse.org
    
    Pinging opensuse.org [2001:67c:2178:8::16] with 32 bytes of data:
    Reply from 2001:67c:2178:8::16: time=29ms
    Reply from 2001:67c:2178:8::16: time=81ms
    Reply from 2001:67c:2178:8::16: time=28ms
    
    Ping statistics for 2001:67c:2178:8::16:
        Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
    Approximate round trip times in milli-seconds:
        Minimum = 28ms, Maximum = 81ms, Average = 46ms
    Everything is connected to the same router, which hands out ipv6 addresses through dhcp. It's like the workstation and the Tumbleweed boxes are isolated from each other somehow. I have no idea what is going on and what's causing this.
    Feel free to visit my personal OBS repository: https://build.opensuse.org/project/show/home:tyrannishawk

  2. #2
    Join Date
    Sep 2012
    Posts
    6,372

    Default Re: Unable to ping / connect ipv6

    Show output of
    Code:
    ip -6 a
    ip -6 r
    from both Linux systems as well as
    Code:
    ipconfig /all
    from Windows.

  3. #3
    Join Date
    Apr 2017
    Location
    the Netherlands
    Posts
    25

    Default Re: Unable to ping / connect ipv6

    Sure!

    Tumbleweed RPI2 host:
    Code:
    # ip -6 a
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host
    valid_lft forever preferred_lft forever
    2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 fdfc:a327:94c6:1:40d8:403:9174:58da/64 scope global temporary dynamic
    valid_lft 7178sec preferred_lft 7178sec
    inet6 fdfc:a327:94c6:1:ba27:ebff:fec5:1973/64 scope global dynamic mngtmpaddr
    valid_lft 7178sec preferred_lft 7178sec
    inet6 fde7:3586:5da2:10:5454:a8f:aab:40f6/64 scope global temporary dynamic
    valid_lft 585757sec preferred_lft 66818sec
    inet6 fde7:3586:5da2:10:ba27:ebff:fec5:1973/64 scope global dynamic mngtmpaddr
    valid_lft forever preferred_lft forever
    inet6 2001:1c02:3007:60e0:29e6:e863:b799:ec6/64 scope global temporary dynamic
    valid_lft 276sec preferred_lft 276sec
    inet6 2001:1c02:3007:60e0:ba27:ebff:fec5:1973/64 scope global dynamic mngtmpaddr
    valid_lft 276sec preferred_lft 276sec
    inet6 fe80::ba27:ebff:fec5:1973/64 scope link
    valid_lft forever preferred_lft forever
    
    # ip -6 r
    ::1 dev lo proto kernel metric 256 pref medium
    2001:1c02:3007:60e0::/64 dev eth0 proto kernel metric 256 expires 268sec pref medium
    fde7:3586:5da2:10::/64 dev eth0 proto kernel metric 256 pref medium
    fdfc:a327:94c6:1::/64 dev eth0 proto kernel metric 256 expires 7170sec pref medium
    fe80::/64 dev eth0 proto kernel metric 256 pref medium
    default via fe80::f09f:c2ff:fe36:b9c8 dev eth0 proto ra metric 1024 expires 266sec hoplimit 64 pref medium
    Workstation (Garuda Linux boot):
    Code:
    $ ip -6 a
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000 
    inet6 ::1/128 scope host 
    valid_lft forever preferred_lft forever 
    3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000 
    inet6 fdfc:a327:94c6:1:cc4b:48af:a11f:b20f/64 scope global dynamic noprefixroute 
    valid_lft 7099sec preferred_lft 7099sec 
    inet6 fde7:3586:5da2:10:972c:dab2:1fa1:cd36/64 scope global noprefixroute 
    valid_lft forever preferred_lft forever 
    inet6 2001:1c02:3007:60e0:6d3e:60bd:5a96:8105/64 scope global dynamic noprefixroute 
    valid_lft 123sec preferred_lft 123sec 
    inet6 fe80::b903:a36d:af03:eb6c/64 scope link noprefixroute 
    valid_lft forever preferred_lft forever
    
    $ ip -6 r
    ::1 dev lo proto kernel metric 256 pref medium 
    2001:1c02:3007:60e0::/64 dev wlp3s0 proto ra metric 600 pref medium 
    2001:1c02:3007:6000::/56 via fe80::f09f:c2ff:fe36:b9c8 dev wlp3s0 proto ra metric 600 pref medium 
    fde7:3586:5da2:10::/64 dev wlp3s0 proto ra metric 600 pref medium 
    fde7:3586:5da2::/48 via fe80::f09f:c2ff:fe36:b9c8 dev wlp3s0 proto ra metric 600 pref medium 
    fdfc:a327:94c6:1::/64 dev wlp3s0 proto ra metric 600 pref medium 
    fe80::/64 dev wlp3s0 proto kernel metric 600 pref medium 
    default via fe80::f09f:c2ff:fe36:b9c8 dev wlp3s0 proto ra metric 600 pref medium
    
    Workstation (Windows 10 boot):
    Code:
    Windows IP Configuration
    
       Host Name . . . . . . . . . . . . : win-dragon
       Primary Dns Suffix  . . . . . . . :
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
    
    Ethernet adapter Ethernet:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
       Physical Address. . . . . . . . . : B8-88-E3-B0-0E-27
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Wireless LAN adapter Local Area Connection* 1:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
       Physical Address. . . . . . . . . : 16-17-31-18-DB-03
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Wireless LAN adapter Local Area Connection* 2:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #2
       Physical Address. . . . . . . . . : 26-17-31-18-DB-03
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
    
    Wireless LAN adapter WiFi:
    
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Qualcomm Atheros AR5BWB222 Wireless Network Adapter
       Physical Address. . . . . . . . . : A4-17-31-18-DB-03
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
       IPv6 Address. . . . . . . . . . . : 2001:1c02:3007:60e0:d0a1:ca72:7eda:9186(Preferred)
       IPv6 Address. . . . . . . . . . . : fde7:3586:5da2:10:d0a1:ca72:7eda:9186(Preferred)
       IPv6 Address. . . . . . . . . . . : fdfc:a327:94c6:1:d0a1:ca72:7eda:9186(Preferred)
       Temporary IPv6 Address. . . . . . : 2001:1c02:3007:60e0:2959:aa79:3455:4623(Preferred)
       Temporary IPv6 Address. . . . . . : fde7:3586:5da2:10:2959:aa79:3455:4623(Preferred)
       Temporary IPv6 Address. . . . . . : fdfc:a327:94c6:1:2959:aa79:3455:4623(Preferred)
       Link-local IPv6 Address . . . . . : fe80::d0a1:ca72:7eda:9186%14(Preferred)
       IPv4 Address. . . . . . . . . . . : 172.16.10.200(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Lease Obtained. . . . . . . . . . : Wednesday, 14 April 2021 14:25:42
       Lease Expires . . . . . . . . . . : Wednesday, 14 April 2021 20:25:43
       Default Gateway . . . . . . . . . : fe80::f09f:c2ff:fe36:b9c8%14
                                           172.16.10.1
       DHCP Server . . . . . . . . . . . : 172.16.10.1
       DHCPv6 IAID . . . . . . . . . . . : 128194353
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-43-F6-C7-B8-88-E3-B0-0E-27
       DNS Servers . . . . . . . . . . . : 9.9.9.9
                                           149.112.112.112
       NetBIOS over Tcpip. . . . . . . . : Enabled
    Feel free to visit my personal OBS repository: https://build.opensuse.org/project/show/home:tyrannishawk

  4. #4
    Join Date
    Apr 2017
    Location
    the Netherlands
    Posts
    25

    Lightbulb Re: Unable to ping / connect ipv6

    I just figured out that there is also a "smart" switch between the router and the 3 servers I am unable to ping and it seems to lack ipv6 support. Still weird that they can ping each other, but I'm no networking expert.

    I'm going to tinker with this a little more and see if this is the problem. Thanks for trying to help out anyway ;-)
    Feel free to visit my personal OBS repository: https://build.opensuse.org/project/show/home:tyrannishawk

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