■
If the interface address matches with any of the prefix ranges configured in the
IPv6 local address pool on the router, that pool is used to delegate the prefix to
the client.
Order of Preference in Allocating Prefixes and Assigning DNS Addresses to Requesting
Routers
Prefix delegation can be configured at the interface level and at the router level. Also,
certain VSA attributes returned in the RADIUS Access-Accept message from the
authentication server can impact the selection of the prefix to be assigned to the
requesting router. The level of preference attached to each of these prefix delegation
configurations is crucial. The delegating router uses the following order of preference
to determine the source from which the DHCPv6 prefix is delegated to the requesting
router from the DHCPv6 server:
1.
An interface that is configured for prefix delegation is given priority over the
RADIUS attributes returned in the Access-Accept message or the prefixes
configured in the IPv6 local address pool on the delegating router.
2.
The RADIUS server might return one or more of the following attributes in the
Access-Accept message in response to the client authentication request:
■
Ipv6-NdRa-Prefix (VSA 26-129)
■
Framed-IPv6-Prefix (RADIUS IETF attribute 97)
■
Delegated-IPv6-Prefix (RADIUS IETF attribute 123)
■
Framed-IPv6-Pool (RADIUS IETF attribute 100)
If any of the first three attributes are returned, then the prefix contained in those
attributes is used and the pool name in the Framed-IPv6-Pool attribute is ignored.
For example, if both the Delegated-IPv6-Prefix or Framed-IPv6-Prefix, and
Framed-IPv6-Pool attributes are returned from the RADIUS server, the DHCPv6
prefix delegation mechanism uses the Delegated-IPv6-Prefix attribute to advertise
the prefix to clients.
3.
If prefix delegation is not configured at the interface level and if no prefix is
returned 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
Configuring the DHCPv6 Local Address Pools
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
104
■
Configuring the DHCPv6 Local Address Pools
JUNOSe 11.0.x Broadband Access Configuration Guide
Содержание JUNOSE 11.0.X MULTICAST ROUTING
Страница 6: ...vi...
Страница 28: ...xxviii Table of Contents JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 36: ...xxxvi List of Tables JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 42: ...2 Managing Remote Access JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 204: ...164 Managing RADIUS and TACACS JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 274: ...234 CLI Commands Used to Modify RADIUS Attributes JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 292: ...252 Monitoring RADIUS Relay Server JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 336: ...296 RADIUS Client Terminate Reasons JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 368: ...328 Managing L2TP JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 408: ...368 Configuring the Weighted Load Balancing Method JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 444: ...404 PPP Accounting Statistics JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 492: ...452 Monitoring Operational Status within the Current VR Context JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 494: ...454 Managing DHCP JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 510: ...470 DHCP Local Server Configuration Tasks JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 528: ...488 Configuring the Router to Work with the SRC Software JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 556: ...516 Configuring DHCP Relay Proxy JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 616: ...576 Managing the Subscriber Environment JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 632: ...592 Subscriber Management Configuration Examples JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 636: ...596 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 672: ...632 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 674: ...634 Managing Subscriber Services JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 767: ...Part 7 Index Index on page 729 Index 727...
Страница 768: ...728 Index JUNOSe 11 0 x Broadband Access Configuration Guide...