Limitation On The Number Of Prefixes Used By Clients - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - BROADBAND ACCESS CONFIGURATION GUIDE 2010-10-12 Configuration Manual

Limitation on the Number of Prefixes Used by Clients

host1#show ipv6 local pool largePrefixRange
Pool : largePrefixRange
-----------------------
Utilization : 0
Start
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3003:3003::/64
Start
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3003:3003::/64
host1#show ipv6 local pool
Copyright © 2010, Juniper Networks, Inc.
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
7.
can exclude those addresses that are assigned to local interfaces. You can exclude
specific prefixes or a range of prefixes from delegation to clients.
host1(config-v6-local)#exclude-prefix 5005:5005:2::/48 5005:5005:a::/48
In this example, all prefixes between the starting prefix of the range, 5005:5005:2::/48,
and the ending prefix of the range, 5005:5005:a::/48 are excluded from allocation
to clients.
Map the domain name to the IPv6 local address pool, which is used for prefix
8.
delegation. If the authentication server returns the prefix pool name in the
Framed-Ipv6-Pool attribute of the RADIUS-Accept-Request message, this value
overrides the IPv6 local pool configured using the ipv6-prefix-pool-name command.
host1(config)#aaa domain-map westford.com
host1(config-domain-map)#ipv6-prefix-pool-name local_addr_pool
For more information about mapping domain names to the IPv6 local address pool,
see ipv6-prefix-pool-name.
If you a configure a very large prefix range in an IPv6 local address pool, the number of
prefixes that can be used from that range by DHCPv6 clients is limited to 1048576.
Consider the following example in which an IPv6 local address pool, largePrefixRange,
is configured. The prefix range is specified by the starting prefix and its length as
3003:3003::/32.
host1(config)#ipv6 local pool largePrefixRange
host1(config-v6-local)#prefix 3003:3003::/32 64
host1(config-v6-local)#end
The Total field of the output of the following show ipv6 local pool largePrefixRange
and show ipv6 local pool commands indicates the number of prefixes that can be
allocated to DHCPv6 clients: 1048756.
End
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3003:3003:ffff:ffff::/64
Preferred
Exclude Util Lifetime
------- ---- ----------
0 0 1 day
IPv6 Local Address Pools
Chapter 1: Configuring Remote Access
Total In Use
------- -------
1048576 0
Valid
Lifetime
----------
1 day
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