Cisco Cisco Packet Data Gateway (PDG) 产品宣传页
LAC Service Configuration Mode Commands
tunnel selection-key ▀
Cisco ASR 5x00 Command Line Interface Reference ▄
6531
from AAA Server in Access-Accept message. This value of attribute is treated as a key for tunnel selection
and creation.
When the LAC needs to establish a new L2TP session, it first checks for an existing L2TP tunnel with the
peer LNS based on the value of the key configured. If no such tunnel exists for the key, it will create a new
tunnel with the LNS.
The default configuration has the selection-key as
and creation.
When the LAC needs to establish a new L2TP session, it first checks for an existing L2TP tunnel with the
peer LNS based on the value of the key configured. If no such tunnel exists for the key, it will create a new
tunnel with the LNS.
The default configuration has the selection-key as
none
. Hence, LAC will not make use of key to choose a
tunnel with LNS in default setup.
The maximum number of sessions, as configured via the
The maximum number of sessions, as configured via the
max-sessions-per-tunnel
command, is
applicable for each tunnel created through this command. By default, each tunnel supports 512 sessions.
If the LAC service needs to establish a new tunnel for a new L2TP session with LNS and the tunnel create
request fails because maximum tunnel creation limit is reached, LAC will try other LNS addresses received
from AAA server in Access-Accept message for the APN/subscriber. If all available peer-LNS are exhausted,
LAC service will reject the call.
If the LAC service needs to establish a new tunnel for a new L2TP session with LNS and the tunnel create
request fails because maximum tunnel creation limit is reached, LAC will try other LNS addresses received
from AAA server in Access-Accept message for the APN/subscriber. If all available peer-LNS are exhausted,
LAC service will reject the call.
Example
The following command enables the use of “Tunnel-Server-Auth-ID” attribute value received from AAA
Server in Access-Accept message as a key for tunnel selection and creation:
Server in Access-Accept message as a key for tunnel selection and creation:
tunnel selection-key tunnel-server-auth-id