Alcatel-Lucent 7750 Reference Manual page 17

Table 2: Subscriber Host Identification (description) (Continued)
Attribute ID Attribute Name
22 Framed-Route
25 Class
7750 SR RADIUS Attributes Reference Guide
Routing information (IPv4 managed route) to be configured on the NAS
for a host (dhcp, pppoe, arp) that operates as a router without NAT (so
called routed subscriber host). The route included in the Framed-Route
attribute is accepted as a managed route only if it's next-hop points to the
hosts ip-address or if the next-hop address equals 0.0.0.0 or if the
included route is a valid classful network in case the subnet-mask is
omitted. If neither is applicable, this specific framed-route attribute is
ignored and the host is instantiated without this specific managed route
installed. A Framed-Route attribute is also ignored if the SAP does not
have anti-spoof configured to nh-mac (the host will be installed as a
standalone host without managed route). Number of routes above Limits
are silently ignored. Optionally, a metric, tag and/or protocol preference
can be specified for the managed route. If the metrics are not specified or
specified in a wrong format or specified with out of range values then
default values are used for all metrics: metric=0, no tag and
preference=0.
If an identical managed route is associated with different routed
subscriber hosts in the context of the same IES/VPRN service up to
<max-ecmp-routes> managed routes are installed in the routing table
(configured as ecmp <max-ecmp-routes> in the routing instance).
Candidate ECMP Framed-Routes have identical prefix, equal lowest
preference and equal lowest metric. The "lowest ip next-hop" is the tie
breaker if more candidate ECMP Framed-Routes are available than the
configured <max-ecmp-routes>. Other identical managed routes are
shadowed (not installed in the routing table) and an event is logged. An
alternative to RADIUS managed routes are managed routes via host
dynamic BGP peering.
Valid RADIUS learned managed routes can be included in RADIUS
accounting messages with following configuration: configure
subscriber-mgmt radius-accounting-policy <name> include-radius-
attribute framed-route. Associated managed routes for an instantiated
routed subscriber host are included in RADIUS accounting messages
independent of the state of the managed route (Installed, Shadowed or
HostInactive).
Attribute sent by the RADIUS server to the NAS in an Access-Accept or
CoA and is sent unmodified by the NAS to the Accounting server as part
of the Accounting-Request packet. Strings with a length longer than the
defined Limits are accepted but truncated to this boundary. Only first
64B are stored in the CF persistency file.
RADIUS Attributes Reference
Description
Page 17