Handing out DNS server from Cisco local pool

Frank Bulk frnkblk at iname.com
Mon Mar 21 22:45:53 CET 2011


Yes, that 65 was a typo. =)

I'm using local pools for testing some DSL modems that also have an Ethernet
port for their WAN interface.  I already use dhcpv6 relay for the IA_PD, but
IA_NA is obtained from the local pool.  If you think that with 12.2(33)SRE2
IA_NA should be obtainable via DHCPv6 relay, I'll rip out the local pool
stuff and test again.

Or can I use "ipv6 dhcp server <foo>" for IA_NA and dhcpv6 relay for IA_PD?

I'm not keen on RADIUS for dynamic address allocations.  Another
configuration element that needs to be configured and managed by our tools
and helpdesk.  


-----Original Message-----
From: Ole Troan [mailto:ichiroumakino at gmail.com] On Behalf Of Ole Troan
Sent: Monday, March 21, 2011 4:09 PM
To: frnkblk at iname.com
Cc: ipv6-ops at lists.cluenet.de
Subject: Re: Handing out DNS server from Cisco local pool


> If I want to hand out an IPv6 DNS server via Cisco's local pool for the
> interface, how is that done?
> With IPv4 it's just a:
> interface Virtual-Template1
> ppp ipcp dns <IP 1> <IP 2>
> With IPv6 it's supposed to run DHCPv6 over the WAN link, and Cisco's
> pool" command hands out IPv6 addresses very nicely:
> ipv6 local pool ipv6pool-lns <IPv6>::/56 65

btw: I'm not that keen on the local pools. if you can use RADIUS and give
out a static prefix on each PPP link instead.

> but there appears to be no way to specify the DNSv6 address(es).

define an ipv6 dhcp pool, e.g.
ipv6 dhcp pool <foo>
 dns-server <bar>

and add "ipv6 dhcp server <foo>" under the virtual-template interface.


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