Cisco Cisco Packet Data Gateway (PDG) Guida Alla Risoluzione Dei Problemi
LNS Service Configuration Mode Commands
keepalive-interval ▀
Cisco ASR 5000 Series Command Line Interface Reference ▄
OL-22948-01
keepalive-interval
This command specifies the amount of time to wait before sending a Hello keep alive message.
Product
PDSN, GGSN
Privilege
Security Administrator, Administrator
Syntax
Disables the generation of Hello keep alive messages on the tunnel.
Default: 60
The number of seconds to wait before sending a Hello keep alive message. The number can be configured to
any integer value from 30 to 2147483648.
The number of seconds to wait before sending a Hello keep alive message. The number can be configured to
any integer value from 30 to 2147483648.
Usage
Use this command to set the amount of time to wait before sending a Hello keep alive message or disable the
generation of Hello keep alive messages completely. A keep alive mechanism is employed by L2TP in order
to differentiate tunnel outages from extended periods of no control or data activity on a tunnel. This is
accomplished by injecting Hello control messages after a specified period of time has elapsed since the last
data or control message was received on a tunnel. As for any other control message, if the Hello message is
not reliably delivered then the tunnel is declared down and is reset. The transport reset mechanism along with
the injection of Hello messages ensures that a connectivity failure between the LNS and the LAC is detected
at both ends of a tunnel.
generation of Hello keep alive messages completely. A keep alive mechanism is employed by L2TP in order
to differentiate tunnel outages from extended periods of no control or data activity on a tunnel. This is
accomplished by injecting Hello control messages after a specified period of time has elapsed since the last
data or control message was received on a tunnel. As for any other control message, if the Hello message is
not reliably delivered then the tunnel is declared down and is reset. The transport reset mechanism along with
the injection of Hello messages ensures that a connectivity failure between the LNS and the LAC is detected
at both ends of a tunnel.
Example
Use the following command to set the Hello keep alive message interval to 120 seconds:
keepalive-interval
Use the following command to set the Hello keep alive message interval to 120 seconds:
keepalive-interval
Use the following command to disable the generation of Hello keep alive messages:
no keepalive-interval
no keepalive-interval