B-34
Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
OL-8723-19
Appendix B System Usage of MGW Keepalive Parameters, Release 5.0
Keepalive for Release 5.0 Maintenance Release 1.1 and Later
KA Attempts Unsuccessful, MGW Unreachable, and No Stable Calls Present
This condition is similar to the condition described in
“KA Attempts Unsuccessful, MGW Unreachable,
and Stable Call Is Present” section on page B-32
. However, the intervals that occur after the KA attempt
failure are different. This condition, with no stable calls present, is shown in
.
Figure B-25
KA Attempts Unsuccessful, MGW Unreachable, and No Stable Calls Present
KA 1-1
KA 1-2
KA 1-
3
KA 1-4
KA 2-1
KA
3
-1
Interval between KA attempts:
S
tarts at 10 seconds and increases
as shown, but is not allowed to exceed
60 seconds (not provisionable).
10 seconds 20 seconds 40 seconds
KA attempt failure – Gateway unreachable.
Occurs if no ACK is received at
any time during this AUEP transaction.
mgcp-keepalive-retries
(default =
3
)
Minimum value is
mgcp-keepalive-interval
(default = 60 seconds).
Maximum value is
mgcp-max-keepalive-interval
(default = 600 seconds).
KA attempts,
all unsuccessful
Time interval (T) with no MGCP
messages when there are no
stable calls, as in
S
cenario 2:
Intervals increase by 60 seconds up to
a limit of mgcp-max-keepalive-interval
(default = 600 seconds)
T
T
T + 60
T + 120
250151
Time
