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IPv6, General Prefixes, Subnetting and EUI-64, all together

Hi All. I'm trying to get my head around IPv6 addressing using general prefixes. I am trying to set up addressing using my ISP allocated global unicast prefix. It is in the form of:

2001:44b8:4121:xx00::/56

From this I want to break it up into subnets as follows:

2001:44b8:4121:xx01::/64
2001:44b8:4121:xx02::/64
2001:44b8:4121:xx03::/64
...

I've set up a general prefix:

ipv6 general-prefix inode_gp 2001:44B8:4121:xx00::/56

The issue I'm having is how to apply this to the various interfaces using eui-64 and have each interface (or sub-interface) sitting on its respective subnet. I cannot seem to find the correct command syntax to do this. I have been using the format:

interface Loopback0
 ip address 1.1.4.2 255.255.255.255
 ipv6 address inode_gp ::/64 eui-64
 ipv6 enable

Which gives me:

2001:44B8:4121:xx00:223:EBFF:FEAD:EE60

The command takes but there is no subnet. How do I get it to use he general prefix, use eui-64 to generate the node address and stick a subnet in between?

 

There is plenty of stuff out there on general prefixes but nothing I can find that shows how to subnet and use eui-64 together. Not that it makes any difference but this config is on an Aironet AP1142. I want to use a similar config on my C887VAM.

 

Matt.

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