How to enable IPV6 on a Cisco connected to Swisscom (Bluewin) ! ipv6 unicast-routing ipv6 cef ! ipv6 general-prefix 6RD-SWISSCOM 6rd Tunnel6 ! interface Ethernet0 ipv6 enable ! interface Tunnel6 description Swisscom 6RD Tunnel to Local LAN no ip address no ip redirects ipv6 enable ipv6 mtu 1480 tunnel source Ethernet0 tunnel mode ipv6ip 6rd tunnel 6rd ipv4 prefix-len 0 tunnel 6rd prefix 2A02:1200::/28 tunnel 6rd br 193.5.29.1 ! ipv6 route ::/0 Tunnel6 2A02:120C:1051:D010:: ! interface Vlan1 ipv6 enable ipv6 address 6RD-SWISSCOM ::1:0:0:0:1/64 ipv6 nd autoconfig prefix ! ! and for all VLANs… ! interface Vlan13 ipv6 enable ipv6 address 6RD-SWISSCOM ::D:0:0:0:1/64 ipv6 nd autoconfig prefix ! interface Vlan16 ipv6 enable ipv6 address 6RD-SWISSCOM ::F:0:0:0:1/64 ipv6 nd autoconfig prefix ! Swisscom uses /28 for 6rd, using the full 32 bits of the IPv4 address. Every subscriber gets a /60, i.e. 16x /64-subnets (0..F) Sample Dynamic IPV6 assignation : 2A02:1205:C684:D320::/60 = 2a02:1205:c684:D320:0000:0000:0000:0000/60 2a02:1205:c684:D320/60 => 2a02:1205:c684:D320/64 .. 2a02:1205:c684:D32F/64 2a02:1205:c684:D32x:0000:0000:0000:0000/60 here x can be any value from 0 to F To configure a 6rd-capable router, you need to know the following elements: The IPv4 address of the 6rd Border Relay: 6rd.swisscom.com (currently 193.5.29.1) The 6rd IPv6 prefix: 2a02:1200::/28 The IPv4 mask length: 0 (default) Set MTU manually to 1480 Bytes The Gateway (Next-Hop) is 2A02:120C:1051:D010:: N.B. ::193.5.29.1, ::193.5.122.254, 2A02:120A:4809:B170:: are not working as gateway V6 Prefix: 2A02:1200::/28 Border Relay address: 193.5.29.1 V4 Prefix, Length: 0 V4 Suffix, Length: 0 Next-Hop: 2A02:120C:1051:D010:: 6rd Border Relay: 6rd.ip-plus.net [OLD] … => 2013-04-08 : 193.5.122.254 [NEW] 2013-04-09 => … : 193.5.29.1 baco-router#show ipv6 neighbors | inc 193.5.29.1 2A02:120C:1051:D010:: 20 193.5.29.1 REACH Tu6 DNS Servers: DNS Swisscom 2001:918:0:1d::2 OpenDNS servers 2620:0:ccc::2 and 2620:0:ccd::2 The Swisscom / Bluewin DNS servers are: 195.186.1.162 (cns7.bluewin.ch) and 195.186.4.162 (cns8.bluewin.ch) VLANs: VLAN 1 2a02:1205:c684:D321:0000:0000:0000:0001/64 2a02:1205:c684:D321::1/64 ipv6 address 6RD-SWISSCOM ::1:0:0:0:1/64 … VLAN 13 2a02:1205:c684:D32d:0000:0000:0000:0001/64 2a02:1205:c684:D32d::1/64 ipv6 address 6RD-SWISSCOM ::D:0:0:0:1/64 … VLAN 16 2a02:1205:c684:D32f:0000:0000:0000:0001/64 2a02:1205:c684:D32f::1/64 ipv6 address 6RD-SWISSCOM ::F:0:0:0:1/64 N.B. if you have VLAN id higher than 16 you can simply assign one after the other ::0:0:0:0:1/64 to ::F:0:0:0:1/64 one for each VLAN up to 16 => read 4.9 Using VLAN Numbers in IPv6_addressing_plan4.pdf