Cisco Cisco Packet Data Gateway (PDG) Merkblatt
SGTP Service Configuration Mode Commands
▀ max-remote-restart-counter-change
▄ Cisco ASR 5x00 Command Line Interface Reference
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Use this command to avoid unnecessary path failures and deactivations by setting a restart counter change
value ‘window’ or range of values. With this window, the gateway only accepts linearly increasing values for
restart counter change values that are within the specified range of accepted changes before the SGTPC
manager verifies. For example, if the allowed window for restart counter change value is set to 32 and the last
learnt restart counter change value from the GGSN is 15, then the gateway should detect a restart only if the
new restart counter value is between 16 and 47 (range of 32) and then the gateway would verify with the
Echo Request/Response. If the received restart counter change value was 200 and the current learnt value was
15 with a window of 32, then the 200 would be ignored as a spurious value.
Also, use this command to set a restart counter change values window to avoid possible 'race conditions' (as
defined in 3GPP TS 23.007 v8.7.0) where a new message arrives prior to an older message. This 'race
condition' occurs when the gateway's stored restart counter value for the GGSN is larger than the restart
counter value received in the messages received from the GGSN.
Related commands:
value ‘window’ or range of values. With this window, the gateway only accepts linearly increasing values for
restart counter change values that are within the specified range of accepted changes before the SGTPC
manager verifies. For example, if the allowed window for restart counter change value is set to 32 and the last
learnt restart counter change value from the GGSN is 15, then the gateway should detect a restart only if the
new restart counter value is between 16 and 47 (range of 32) and then the gateway would verify with the
Echo Request/Response. If the received restart counter change value was 200 and the current learnt value was
15 with a window of 32, then the 200 would be ignored as a spurious value.
Also, use this command to set a restart counter change values window to avoid possible 'race conditions' (as
defined in 3GPP TS 23.007 v8.7.0) where a new message arrives prior to an older message. This 'race
condition' occurs when the gateway's stored restart counter value for the GGSN is larger than the restart
counter value received in the messages received from the GGSN.
Related commands:
disable-remote-restart-counter-verification
- also part of the SGTP service configuration
mode, this command allows the operator to disable the default behavior.
pdp-deactivation-rate
, in the SGSN Global configuration mode, this allows the operator to
modify the rate the gateway deactivates PDP connections when GPT-C path failure is detected.
ignore-remote-restart-counter
, also part of the SGTP service configuration mode.
Example
Use the following command to configure an allowed restart counter change value window of
32
:
max-remote-restart-counter-change 32