Alcatel-Lucent 7750 Reference Manual page 62

Wholesale-Retail — L2TP Tunneled Access Mode
Table 8: Wholesale-Retail: L2TP Tunneled Access Mode (description) (Continued)
Attribute ID
26-6527-47 Alc-Tunnel-Algorithm
26-6527-48 Alc-Tunnel-Max-Sessions
26-6527-49 Alc-Tunnel-Idle-Timeout
26-6527-50 Alc-Tunnel-Hello-Interval
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Attribute Name
Describes how new sessions are assigned (weighted-access,
weighted-random or existing-first) to one of the set of suitable
tunnels that are available or could be made available. A pre-
configured algorithm (configure router/service vprn <service-id>
l2tp session-assign-method) is used when this attribute is omitted.
The value existing-first specifies that the first suitable tunnel is used
or set up for the first session and re-used for all subsequent sessions.
The weighted-access value specifies that the sessions are equally
distributed over the available tunnels; new tunnels are set up until the
maximum number is reached; the distribution aims at an equal ratio
of the actual number of sessions to the maximum number of sessions.
When there are multiple tunnels with an equal number of sessions
(equal weight), LAC selects the first tunnel from the candidate list.
The weighted-random value enhances the weighted-access
algorithm such that when there are multiple tunnels with an equal
number of sessions (equal weight), LAC randomly selects a tunnel.
The maximum number of sessions per tunnel is retrieved via attribute
26-6527-48 Alc-Tunnel-Max-Sessions or set to a pre-configured
value if Alc-Tunnel-Max-Sessions is omitted. Values outside the
limits are treated as a setup failure.
The maximum number of sessions allowed per Tunnel (if tag is
1..31) or per Tunnel-Group (if tag is 0).This attribute has the same
meaning as attribute 26-2352-21 Tunnel-Max-sessions and 26-4874-
33 ERX-Tunnel-Maximum-Sessions with the only difference that
these latter attributes refers to the Tunnel-Group only (untagged
attributed). No sessions are setup above the Limits. Pre-configured
values (configure router/service vprn <service-id> l2tp session-
limit) are used when attribute is omitted.
The period of time in seconds, that an established tunnel with no
active sessions (Established-Idle) persists before being disconnected.
The value with tag 0 is used as default for the tunnels where the value
is not specified. Pre-configured values are used when attribute is
omitted (configure router/service vprn <service-id> l2tp idle-
timeout). The tunnel is not disconnected (infinite) without local
configured idle-timeout or if the attribute has value -1 (16777215).
Values above Limits are treated as setup failures.
The time interval in seconds between two consecutive tunnel Hello
messages. A value of '-1' specifies that the keepalive function is
disabled. The value with tag 0 is used as default for the tunnels where
the value is not specified. Pre-configured values are used when
attribute is omitted (configure router/service vprn <service-id>
l2tp hello-interval). Values outside Limits are treated as a setup
failure.
7750 SR RADIUS Attributes Reference Guide
Description