Keepalive Process - Cisco BTS 10200 Troubleshooting Manual

Appendix B System Usage of MGW Keepalive Parameters, Release 5.0

Keepalive Process

This section describes the keepalive (KA) process. The BTS 10200 performs KA attempts to determine
whether a MGW should be considered to be in working status or down status.
There are three KA scenarios covered in this section:
•
•
•
The following sections refer to two types of MGWs, residential gateways (RGWs) and trunking
Note
gateways (TGWs). A MGW is identified as either a RGW or TGW according to the provisioning of the
type token in the mgw table (type=rgw or type=tgw).
Scenario 1—MGW Reachable
This scenario applies to the following types of MGWs (when the MGWs are reachable):
•
•
•
Three variations of this scenario are described in this section:
•
•
•
OL-8723-19
Scenario 1—MGW Reachable
Scenario 2 (Special Case)—Reachable RGW with 16 or Fewer Endpoints and No Stable Calls In
Progress
Scenario 3—MGW Unreachable
Trunking gateways (TGWs), with or without stable calls in progress
Residential gateways (RGWs) with more than 16 endpoints, with or without stable calls in progress
RGWs with 16 or fewer endpoints and with stable call(s) in progress
Basic Scenario
MGCP Message Sent and Is Unsuccessful
MGCP Message Sent and Is Successful
Keepalive for Release 5.0 Maintenance Release 1.1 and Later
Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
B-25