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Cisco 890 and ipv6

Greetings fellow Netwroking friends.

I have a quick question, I am hoping there's an easy answer to.

We were looking to deploy Windows DirectAccess, and as a part of that, it requires some form of ipv6 support.

Our office, like many, uses a cisco 890 as an edge device, the outside port (G0 and FE8) have public addresses and everything else is NATT'd to the internal network, the device also has 8 L2 switchports.

I need a way to get the ipv6 addresses to the windows box, as MS Direct Access does not support NAT.

I have currently:

interface FastEthernet8

description 50U/50D Fiber Connect

bandwidth 50000

ip address

ip flow ingress

ip flow egress

ip nat outside

ip virtual-reassembly max-reassemblies 128

zone-member security outside

duplex auto

speed auto

ipv6 address xxxx:xxxx:FFFF:FF1B::2/64



And I was hoping to do

interface Vlan2607




And then

interface FastEthernet1

description soDetroitAccess VLAN

switchport trunk native vlan 2607



and make the ipv6 subnet availavble on one of the internal switch ports, so I can then address the windwos server interface on teh same network, but I get :

%Vlan2607: Error: xxxx:xxxx:FFFF:FF1B::/64 is overlapping with xxxx:xxxx:FFFF:FF1B::/64 on FastEthernet8

Anyone have any suggestions or ideas on how to walk the network through my router ?


VIP Super Bronze

Re: Cisco 890 and ipv6


Under each interface, can you try your ipv6 address and add eui-64 to it?

xxxx:xxxx:FFFF:FF1B::3/64 eui-64


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