Cisco Cisco Packet Data Gateway (PDG)
Usage Guidelines
Use this command to adjust the rate at which the GGSN sends these packets. GTPv1-C Echo packets are used
to detect whether SGSNs that the GGSN service is communicating with, has become unresponsive or has
rebooted.
to detect whether SGSNs that the GGSN service is communicating with, has become unresponsive or has
rebooted.
The system initiates this protocol for each of the following scenarios:
• Upon system boot
• Upon the configuration of a new SGSN on the system using the sgsn address command as described
in this chapter
• Upon the execution of the path failure detection policy as described in path-failure command of this
chapter
The echo-interval command is used in conjunction with the max-retransmissions and retransmission-timeout
commands as described in this chapter.
commands as described in this chapter.
In addition to receiving an echo response for this echo protocol, if GGSN receives a Node Alive Request
message or a Echo Request message from a presumed dead SGSN, it will immediately assume the SGSN is
active again.
message or a Echo Request message from a presumed dead SGSN, it will immediately assume the SGSN is
active again.
If the GGSN discovers that an SGSN has become unresponsive, it will terminate all PDP contexts that had
been established with the SGSN.
been established with the SGSN.
Examples
The following command configures the GGSN service to send GTP Echo packets every 120 seconds:
echo-interval 120
echo-interval 120
Command Line Interface Reference, Modes G - H, StarOS Release 19
21
GGSN Service Configuration Mode Commands
echo-interval