Zyxel DX3301-T0 on Vodafone VDSL over Telekom line. CHAP succeeds, but connection fails

nyrk · August 19

Hello,

I am trying to use a Zyxel DX3301-T0 directly with my Vodafone VDSL connection.

The physical line is a Telekom line in Baden-Württemberg, Germany, with a Vodafone VDSL contract.

Hardware / connection:

Zyxel DX3301-T0
Firmware: V5.50(ABVY.7.2)C0
VDSL over PTM
DSL sync: approximately 201 Mbit/s down / 42 Mbit/s up

I have attached screenshots of the IPv4 and IPv6 configurations as well as the corresponding logs.
I believe the configuration should be IPv6 + DS-Lite.

IPv6 / DS-Lite test

Mode IPv6 Only
PPPoE
DS-Lite: enabled
DS-Lite Relay Server: automatically configured via DHCP
IPv6 address: automatic
IPv6 DNS: automatic
VLAN q: 7, p: 0
MTU 1492
DHCPv6 “IPv6 Address From DHCPv6 Server”: enabled

The Vodafone authentication seem to work, the log shows:

CHAP authentication succeeded: access accepted : vodafone-vdsl.komplett/[...]
CHAP authentication succeeded
state: up
type: ipv6

But I don't get a connection. I am a bit lost and don't know how to proceed, I would welcome any suggestions.

Peter2 · August 27

I think Vodafone does not use ds-lite via vdsl at a telekom VDSL and IPv6 only but dual stack with both IPv4 and 6 . To test you can try with only IPv4 connection . If you configure as ds-lite not configure fo IPv4 too - choose "obtain other informations from server" The rest seems ok …

Zyxel DX3301-T0 on Vodafone VDSL over Telekom line. CHAP succeeds, but connection fails

IPv6 / DS-Lite test

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