Cisco configuration question

[Frank Bulk]

To answer my own question, I learned that stateful DHCPv6 is supported on
few IOS trains (and on fewer versions), even though stateless DHCPv6,
DHCPv6-PD and stateful DHCPv6 relay may be.  

Here's a Cisco page which lists out minimum release for IPv6 features on
certain software trains:
 
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-roadmap.htm
l
It looks like the feature which is called "DHCP- DHCPv6 individual address
assignment" would be the one I need, and it is only on 12.4(24) and SE46, or
above.

The solution I've been pursuing is stateful DHCPv6 relay for both the IA and
PD, which meant I needed an external DHCPv6 server.  Once the server was in
place, the first roadblock I ran into last week was that static route
insertion of the delegated prefix was not happening on 12.2(31)SB18.  I have
a bug open on that, though the TAC person says this is an "enhancement" bug,
rather than a true bug.  

Frank

-----Original Message-----
From: Mark Smith
[mailto:nanog at 85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org] 
Sent: Saturday, August 07, 2010 8:24 PM
To: frnkblk at iname.com
Cc: ipv6-ops at lists.cluenet.de
Subject: Re: Cisco configuration question

On Sat, 7 Aug 2010 18:22:19 -0500
"Frank Bulk - iName.com" <frnkblk at iname.com> wrote:

> I was able to get a configuration with SLAAC and DHCP-PD going, like this:
> 
>  -----------
>  | 7206VXR | local DHCP pool
>  -----------
>      | SLAAC using single /64
>      |
> gateway/router (LAN address space obtained via DHCP-PD,
>      | SLAAC    DNS suffix and server via stateless DHCP)
>   Laptop
> 
> But I'd like to try the following:
> 
>  -----------
>  | 7206VXR | local DHCP pools for DHCP-PD and gateway/
>  ----------- router WAN
>      | DHCP pool, each gateway/router in separate /64
>      |
> gateway/router (LAN address space obtained via DHCP-PD,
>      | SLAAC    DNS suffix and server via stateless DHCP)
>   Laptop
> 
> Is that even possible?
> 

Yes, with the caveat that I've seen it work on an ASR. You have two
local IPv6 pools on the 7206VXR. One is used for /64s for the links to
the gateway/router, the other is used for DHCPv6-PD assignments.

To specify the pool to use for the /64 assignments for the links to the
gateways/routers, you use the Cisco RADIUS VSA Framed-IPv6-Pool
attribute -

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-adsl
_dial_xe.html#wp1075244

I'm not sure if there is a local CLI equivalent identifying the default
pool to use, that you'd specify under the virtual template.

Regards,
Mark.