pfSense English Support > IPv6

Odd IPv6 Issue

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jamesonp:
I have Time Warner (now Spectrum).  The WAN interface has the DHCP6 option set for IPv6 Config Type and I have it set to request a /56 delegation size.  The WAN interface is assigned 2606:yyyy:xxxx:x:xxxx:xxxx:xxx:xxxx from TW.

I have four different VLANs which I've set the IPv6 config type to track the WAN interface.  Each of the four VLANs has a different prefix ID (0-3) and obtain a different IPv6 /64 range starting with 2606:yyyy.  I have the RA daemon for each VLAN set to advertise as Unmanaged with the router priority set as high.

Now here's the odd part.  IPv6 only works for a short time on each of the clients PCs when running an "ipconfig /renew6" as seen in this short video:

https://streamable.com/uksmx

Windows Firewall is off for testing purposes in the above video.

Now similarly, upon disconnecting an Android phone from the wireless and reconnecting it, the IPv6 works for a short time before reverting back to IPv4.

I can't for the life of me figure out what would be causing this behavior!  Thank you for your help.

JKnott:
Does pfSense maintain an IPv6 address?

BTW, why don't people ever have even issues?   ;)

jamesonp:
It does maintain an IP and can ping ipv6.google.com

pmisch:
Might be a good idea to sniff with wireshark and have look at what messages you see from your router (router advertisements or answers to router discoveries). You might want to filter for ICMP6 packages.
Did you set the router lifetime in the RA settings on the firewall?

jamesonp:

--- Quote from: pmisch on November 28, 2017, 11:41:56 am ---Might be a good idea to sniff with wireshark and have look at what messages you see from your router (router advertisements or answers to router discoveries). You might want to filter for ICMP6 packages.
Did you set the router lifetime in the RA settings on the firewall?

--- End quote ---

I changed the router lifetime to 1800 and still no change.  I ran Wireshark and didn't see anything abnormal with the RA messages.  Although I am new at reading these.  Maybe you could have a look:


RA


--- Code: ---Frame 118915: 246 bytes on wire (1968 bits), 246 bytes captured (1968 bits) on interface 0
Ethernet II, Src: AdiEngin_xx:xx:xx (xx:xx:xx:xx:xx:xx), Dst: AsustekC_39:04:98 (xx:xx:xx:xx:xx:xx)
Internet Protocol Version 6, Src: fe80::1:1, Dst: fe80::e899:1dd9:b899:72ae
    0110 .... = Version: 6
    .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
    .... .... .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
    Payload Length: 192
    Next Header: ICMPv6 (58)
    Hop Limit: 255
    Source: fe80::1:1
    Destination: fe80::e899:1dd9:b899:72ae
    [Source GeoIP: Unknown]
    [Destination GeoIP: Unknown]
Internet Control Message Protocol v6
    Type: Router Advertisement (134)
    Code: 0
    Checksum: 0x6d13 [correct]
    [Checksum Status: Good]
    Cur hop limit: 64
    Flags: 0x08, Prf (Default Router Preference): High
    Router lifetime (s): 1800
    Reachable time (ms): 0
    Retrans timer (ms): 0
    ICMPv6 Option (Prefix information : 2606:6000:xxxx:xxxx::/64)
        Type: Prefix information (3)
        Length: 4 (32 bytes)
        Prefix Length: 64
        Flag: 0xe0, On-link flag(L), Autonomous address-configuration flag(A), Router address flag(R)
        Valid Lifetime: 86400
        Preferred Lifetime: 14400
        Reserved
        Prefix: 2606:6000:xxxx:xxxx::
    ICMPv6 Option (Route Information : Medium ::/0)
        Type: Route Information (24)
        Length: 3 (24 bytes)
        Prefix Length: 0
        Flag: 0x00, Route Preference: Medium
        Route Lifetime: 60
        Prefix: ::
    ICMPv6 Option (Recursive DNS Server 2001:4860:4860::8888 2001:4860:4860::8844)
        Type: Recursive DNS Server (25)
        Length: 5 (40 bytes)
        Reserved
        Lifetime: 20
        Recursive DNS Servers: 2001:4860:4860::8888
        Recursive DNS Servers: 2001:4860:4860::8844
    ICMPv6 Option (DNS Search List Option home.internal.yyyy.com home.internal.yyyy.com)
        Type: DNS Search List Option (31)
        Length: 8 (64 bytes)
        Reserved
        Lifetime: 20
        Domain Names: home.internal.yyyy.com
        Domain Names: home.internal.yyyy.com
    ICMPv6 Option (MTU : 1500)
        Type: MTU (5)
        Length: 1 (8 bytes)
        Reserved
        MTU: 1500
    ICMPv6 Option (Source link-layer address : xx:xx:xx:xx:xx:xx)
        Type: Source link-layer address (1)
        Length: 1 (8 bytes)
        Link-layer address: AdiEngin_xx:xx:xx (xx:xx:xx:xx:xx:xx)

--- End code ---

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