Route64.org IPv6 tunnel with 891, config question?

[Honkkis]

Hi,

probably a noob question and problem for Cisco-wizards, but has anyone route64.org IPv6-tunnel config to share? IPv6 tunnelbrokers seem to close one after one, whilst I'm stuck with IPv4 world with my ISP. I have used so far Hurricane Electric tunnel on various 880-/890-series routers, and my latest tunnel was from tunnelbroker.ch, which closed in January 2025. Since I'm in Europe, using tunnel ending in Europe seems reasonable. Route64 provides absolutely no guides except couple *nix examples. All internet searches ended to nothing. Using 891F with c800-universalk9-mz.SPA.159-3.M2.

Route64.org gives IPv6 address and /56 subnet, tunnel type is described as SIT. I think my tunnel config is probably at least partially ok, because I can ping Google IPv6 DNS from router prompt. My computer (Win11) gets currently only link-local IPv6 address, not the usual amount of addressess. Tunneltype I'm using is ipv6ip, it worked with tunnelbroker.ch. WAN interface is GigaBit8, no complex VLAN-configs or anything, just DHCP and NAT, no fixed ip, single bridge-group. Tried eui-64 on VLAN1, no-go.

interface GigabitEthernet8
no ip address
duplex full
speed auto
media-type rj45
bridge-group 1
!
interface Vlan1
ip address 10.0.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
ipv6 address XXXX:XXX:XXXX:B700::3/56
ipv6 enable
!

interface Tunnel60
description IPv6 tunnel route64.org
no ip address
ipv6 address 2A11:XXX:XXX:XX::2/64
ipv6 enable
keepalive 10 3
tunnel source BVI1
tunnel mode ipv6ip
tunnel destination 118.91.XXX.XX

Any help greatly appreciated, thanks in advance!

[mo01]

To make SLAAC autoconfig work, you have to use /64 for the interface that connects to your computers.

You can just use the first /64 of the /56 you got in VLAN1 and the second one in VLAN2 etc. if needed.

ipv6 address XXXX:XXX:XXXX:B700::3/64

ipv6 address XXXX:XXX:XXXX:B701::3/64 for VLAN2 etc.

[Mark Pace Balzan]

Hi

Can you clarify if your tunnel is indeed up and receiving prefix from its tunnel peer ?

Is your question about the wan tunnel or the lan/slaac.  Which interface is connected to your lan/laptop. That interface must have /64 be sending RAs