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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 2 Scalability and Performance
Configuring the Cisco 10000 Series Router for High Scalability
Note The No Session Timeout parameter indicates the length of time a tunnel persists when there are no
sessions in the tunnel.
Example 2-5 Configuring an L2TP Tunnel Password
Router(config)# vpdn-group tunnel1
Router(config-if)# l2tp tunnel password 7
Example 2-6 Configuring the No Session Timeout Parameter
Router(config)# vpdn-group tunnel1
Router(config-if)# l2tp tunnel nosession-timeout 30
Example 2-7 Configuring the L2TP Tunnel Receive-Window and Retransmit Timeout Parameters
Router(config)# vpdn-group tunnel1
Router(config-if)# l2tp tunnel receive-window 100
Router(config-if)# l2tp tunnel retransmit timeout min 2
Router(config-if)# l2tp tunnel retransmit timeout max 8
VPDN Group Session Limiting
Before the introduction of the VPDN Group Session Limiting feature introduced in Cisco IOS software
release 12.2(1)DX, you could only globally limit the number of VPDN sessions on a router with limits
applied equally to all VPDN groups. Using the VPDN Group Session Limiting feature, you can limit the
number of VPDN sessions allowed per VPDN group. For more information, see the VPDN Group
Session Limiting feature documentation, located at the following URL:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/products_feature_guide09186a0080087ef2.
html
Configuring the PPP Authentication Timeout
To keep the L2TP network server (LNS) from timing out a PPP authentication process, set the
PPP
Timeout parameter to 100, using the ppp timeout authentication command (Example 2-8).
Example 2-8 Configuring the PPP Authentication Timeout
Router(config)# interface Virtual-Template1
Router(config-if)# ppp timeout authentication 100
Disabling Cisco Discovery Protocol
To maximize scalability, do not enable the Cisco Discovery Protocol (CDP).
Note CDP is disabled by default.