Juniper JUNOSE 11.1.X - BROADBAND ACCESS CONFIGURATION GUIDE 6-4-2010 Configuration Manual page 148

JUNOSe 11.1.x Broadband Access Configuration Guide
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NOTE: The preferred lifetime must be less than or equal to the valid lifetime.
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Configuring the DHCPv6 Local Address Pools
have 56 as the prefix length. When you specify the prefix range in this way,
you must ensure that the starting and ending prefixes are of the same length.
Specify the time period when the requesting router can use the prefix. You can
configure a preferred lifetime or a valid lifetime for the requesting router to use
when you configure the prefix range. If no lifetime is specified when you configure
the prefix range, the default lifetime of 1 day is assigned.
Specify the number of days and, optionally, the number of hours, minutes,
and seconds. You cannot specify a lifetime of zero (that is, you cannot set
the days, hours, minutes, and seconds fields all to zero).
host1(config-v6-local)#prefix 5005:5005::/32 48 preferred 1 2 3 4
In this example, the preferred lifetime is set to 1 day, 2 hours, 3 minutes,
and 4 seconds. Because the valid lifetime is not configured, the default value
of 1 day is assigned.
Use the infinite keyword to specify a lifetime that does not expire.
host1(config-v6-local)#prefix 5005:5005::/32 48 valid infinite
In this example, the period for which the prefix remains valid indefinitely
for the requesting router to use after it has been delegated by the DHCPv6
server. In this case, the preferred lifetime is set to 1 day by default.
Specify the IPv6 address of the DNS servers to be returned to the client. You can
configure a primary and secondary DNS server. The DNS server addresses are
returned to the client in DHCPv6 responses as part of the DNS Recursive Name
Server option.
host1(config-v6-local)#dns-server 3001::1 3001::2
If the DNS server is not configured in the IPv6 local address pool, the DNS server
configured on the DHCPv6 local server is used to delegate prefixes. However, if
DNS servers are configured both in the IPv6 local pool and on the DHCPv6 local
server, the values configured in the IPv6 local pool take precedence.
Specify the name of a DNS domain in the IPv6 local pool to be returned to clients
in the DHCPv6 responses as part of the Domain Search List option. The client
uses this domain name for DNS resolution. You can specify a maximum of four
DNS domains for an IPv6 local pool's search list.
host1(config-v6-local)#dns-domain-search test1.com
host1(config-v6-local)#dns-domain-search test2.com
You can configure one domain name per line. Enter the command on separate
lines to configure additional domain names.
Set certain prefixes to be excluded from being allocated to the requesting router.
You can exclude those addresses that are assigned to local interfaces. You can
exclude specific prefixes or a range of prefixes from delegation to clients.