Cisco Cisco Packet Data Gateway (PDG) Guia De Resolução De Problemas
LAC Service Configuration Mode Commands
tunnel selection-key ▀
Cisco ASR 5000 Series Command Line Interface Reference ▄
OL-22947-02
tunnel selection-key
This command enables the support to create tunnels between L2TP service and an LNS server on the basis of value of
attribute ―Tunnel-Server-Auth-ID‖ received from AAA server.
attribute ―Tunnel-Server-Auth-ID‖ received from AAA server.
Privilege
Security Administrator, Administrator
Syntax
This keyword disables the creation of tunnel between LAC service and LNS based on key value received in
attribute, ―Tunnel-Server-Auth-ID‖ from AAA server.
attribute, ―Tunnel-Server-Auth-ID‖ from AAA server.
Default: Enabled
This keyword enables the creation of tunnels between LAC service on GGSN and an LNS server on the basis
of domain attribute, ―Tunnel-Server-Auth-ID‖, value received from AAA server.
This keyword enables the creation of tunnels between LAC service on GGSN and an LNS server on the basis
of domain attribute, ―Tunnel-Server-Auth-ID‖, value received from AAA server.
Default: Enabled
This keyword disables the creation of multiple tunnels between a pair of LAC service on GGSN and LNS
server. LAC will not make use of key to choose a tunnel with LNS in this setup.
This keyword disables the creation of multiple tunnels between a pair of LAC service on GGSN and LNS
server. LAC will not make use of key to choose a tunnel with LNS in this setup.
Usage
Use this command to enable or disable the creation of additional L2TP tunnels between LAC service on
GGSN and LNS server on the basis of ―Tunnel-Server-Auth-ID‖ attribute value received 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 would first check if there is already an existing
L2TP tunnel with the peer LNS based on the value of key configured. If no such tunnel exists for the key, it
will create a new Tunnel with the LNS.
Default configuration have selection-key as
GGSN and LNS server on the basis of ―Tunnel-Server-Auth-ID‖ attribute value received 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 would first check if there is already an existing
L2TP tunnel with the peer LNS based on the value of key configured. If no such tunnel exists for the key, it
will create a new Tunnel with the LNS.
Default configuration have selection-key as
. Hence, LAC will not make use of key to choose a tunnel
with LNS, in default setup.
Maximum number of session as configured with
Maximum number of session as configured with
command will be
applicable for each tunnel created through this command. By default each tunnel supports 512 sessions.
If LAC service needs to establish a new tunnel for 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 LAC service needs to establish a new tunnel for 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:
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: