Руководство По Устранению Ошибки для Cisco Cisco Packet Data Gateway (PDG)
Cisco ASR 5000 Series Access Service Network Gateway Administration Guide ▄
OL-22953-01
Chapter 4
ASN Keep Alive BS Monitoring
The keep alive mechanism is based on two-way transactions consisting of keep alive request and keep alive response
message exchanges. The keep alive mechanism is used over R6/ R4 reference points so that each side can detect a
failure and restart its peer. The ASN GW that detects a failure and restarts its peer may take appropriate actions, such as
cleaning up the corresponding mobile station contexts. The trigger for sending keep alive request messages is based on
the configuration in the ASN GW service.
message exchanges. The keep alive mechanism is used over R6/ R4 reference points so that each side can detect a
failure and restart its peer. The ASN GW that detects a failure and restarts its peer may take appropriate actions, such as
cleaning up the corresponding mobile station contexts. The trigger for sending keep alive request messages is based on
the configuration in the ASN GW service.
Keep alive request and keep alive response messages have a mandatory TLV (Time-Length-Value) of LRT (Last Reset
Time). Based on this TLV value, the ASN GW or base station knows whether the peer node has been restarted during
the during the time interval from the last keep alive interrogation.
Time). Based on this TLV value, the ASN GW or base station knows whether the peer node has been restarted during
the during the time interval from the last keep alive interrogation.