Configuring The Dhcpv6 Local Address Pools - Juniper JUNOSE SOFTWARE 11.2.X - BROADBAND ACCESS CONFIGURATION GUIDE 7-20-2010 Configuration Manual

JunosE 11.2.x Broadband Access Configuration Guide

Configuring the DHCPv6 Local Address Pools

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prefix delegation mechanism uses the Delegated-IPv6-Prefix attribute to advertise
the prefix to clients.
If prefix delegation is not configured at the interface level and if no prefix is returned
3.
from the attribute in the RADIUS Access-Accept message, the prefix configured in
the IPv6 local pool is delegated to the requesting router.
If you configured a list of IPv6 DNS servers and a string of domain names in the IPv6 local
address pool, the order of preference in returning the DNS server address or domain name
to the requesting client in the DHCPv6 response is as follows:
Information returned from the RADIUS server for DNS servers only
Information from the pool
Locally configured DNS attributes
The IPv6 local address pool for DHCP is an object that contains information about prefix
configuration parameters and guidelines that govern the assignment of these prefixes
to requesting routers. If you configured an interface for prefix delegation, the prefix
assigned to that interface takes precedence over the prefix or range of prefixes configured
at the router level in an IPv6 local pool.
To configure an IPv6 local address pool to be used for DHCPv6 prefix delegation:
Enable the IPv6 local address pool to assign prefixes to the requesting router.
1.
host1(config)#ipv6 address-pool local
Configure the name of the IPv6 local address pool from which the delegating router
2.
assigns prefixes to the DHCPv6 client or requesting router.
host1(config)#ipv6 local pool dhcpv6pd_pool
NOTE: You must enable the IPv6 local address pool feature to be able to configure
IPv6 local address pools.
Specify the IPv6 prefix range from which prefixes can be delegated to the DHCPv6
3.
client. You can specify the prefix range in one of the following ways:
Configure the prefix range by specifying an IPv6 prefix and the length of the prefix
to be delegated. This prefix length is also called the assigned prefix length.
host1(config-v6-local)#prefix 2002:2002::/32 48
In this case, the starting and ending prefixes of the range are implicitly specified.
In this example, the start of the range is 2002:2002::/48 and the end of the range
is 2002:2002:ffff::/48. All prefixes assigned from this range have 48 as the prefix
length.
Alternatively, configure the prefix range by specifying the starting and ending IPv6
prefixes of the range.
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