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L2TP Access Concentrator
RADIUS
Local
Attribute
Subscriber
Attribute
Tunnel-
tunnel l2tp
Preference
preference
SN-Tunnel-
loadbalance-
Load-
tunnel- peer
Balancing
Client-
local-address
Endpoint
RADIUS Tagging Support
The system supports RADIUS attribute tagging for tunnel attributes. These "tags" organize together multiple attributes
into different groups when multiple LNS nodes are defined in the user profile. Tagging is useful to ensure that the
system groups all the attributes used for a specific server. If attribute tagging is not supported by your specific RADIUS
server, the system implicitly organizes the attributes in the order that they are listed in the access accept packet.
Configuring Local Subscriber Profiles for L2TP Support
This section provides information and instructions for configuring local subscriber profiles on the system to support
L2TP.
Description
Configures the priority of each peer LNS when
multiple LNS nodes are configured.
Important:
only used when the loadbalance-
tunnel-peers parameter or SN-Tunnel-
Load-Balancing attribute configured
to prioritized.
A vendor-specific attribute (VSA) used to
provides a selection algorithm defining how an
LNS node is selected by the RADIUS server
when multiple LNS peers are configured within
the subscriber profile.
Specifies the IP address of a specific LAC service
configured on the system that to use to facilitate
the subscriber's L2TP session.
This attribute is used when multiple LAC services
are configured.
Variable
Integer from 1 to 65535
This attribute is
IPv4 address in dotted decimal notation.
(xxx.xxx.xxx.xxx)
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
Configuring Subscriber Profiles for L2TP Support ▀
Random - Random LNS selection
order, the Tunnel-Preference
attribute is not used in determining
which LNS to select.
Balanced - LNS selection is
sequential balancing the load across
all configured LNS nodes, the
Tunnel-Preference attribute is not
used in determining which LNS to
select.
Prioritized - LNS selection is
made based on the priority assigned
in the Tunnel-Preference attribute.
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