Руководство По Устранению Ошибки для Cisco Cisco Tunnel Terminating Gateway (TTG)
GGSN Service Configuration Mode Commands
▀ path-failure
▄ Cisco ASR 5000 Series Command Line Interface Reference
OL-22947-02
path-failure
Determines the GTP path-failure behavior on echo/non-echo messages.
Product
GGSN
Privilege
Security Administrator, Administrator
Syntax
No defined detection policy means path-failures are not detected.
Use the default command to set the path-failure detection-policy to gtp in echo mode.
Detection-policy is the policy to be used when path-failure is in the default active state. GTP messages are
either gtp(u) (user) or gtp(c) (control) type, and the gtp keyword takes either echo or non-echo as message
type.
either gtp(u) (user) or gtp(c) (control) type, and the gtp keyword takes either echo or non-echo as message
type.
: gtp(u) or gtp(c) message.
: a message type other than gtp(u) or gtp(c).
Usage
Under current circumstances, a GGSN shuts down the GTP tunnel if the associated SGSN does not respond
to multiple retries of an echo or non-echo message from the GGSN. In this way, a single call failure could be
responsible for the loss of all active calls in the tunnel.
This is also an issue when echo is disabled, or when there is very little traffic on the SGSN and the GGSN is
configured with large echo intervals.
This behavior adversely impacts the user experience because the customer has to reconnect every time this
happens with their SGSN.
to multiple retries of an echo or non-echo message from the GGSN. In this way, a single call failure could be
responsible for the loss of all active calls in the tunnel.
This is also an issue when echo is disabled, or when there is very little traffic on the SGSN and the GGSN is
configured with large echo intervals.
This behavior adversely impacts the user experience because the customer has to reconnect every time this
happens with their SGSN.
Example
The following example detects path failures when the SGSN fails to respond to multiple echo message retries:
The following example detects path failures when the SGSN fails to respond to multiple echo message retries:
The following example turns off path-failure detection. On timeout of gtp(c) message retries, the particular context will
be purged:
be purged: