1085 - GWS MSU too large to be redirected

This message indicates that the system tried to encapsulate an MSU for redirection to an SCP (as part of the Database Transport Access feature).

The DTA feature encapsulates the entire data packet including level 2 MTP. Because the DTA feature requires approximately 24 octets, the original packet can contain a maximum of about 248 octets of “user data.” If the size of the data is larger, the MSU cannot be redirected and is routed to its original destination.

Example

RLGHNCXA21W 00-04-18 19:12:00 EST  EAGLE 31.3.0
0003.1085    CARD 1205,A   INFO   GWSMSU too large to be redirected
SIO=01 OPC=003-237-002 DPC=006-006-000
SR=scrb
LSN=A1234567

Note:

Four outputs are possible. The Legend includes abbreviations found in all variations.

Legend

ADDR: Address
AFTPC: Affected point code (for SCCP messages)
AFTSS: Affected subsystem (identifies the subsystem that failed)
AI: Address Indicator
CDPA: Called party address
CGPA: Calling party address
DATA: Information from the upper layers of SCCP management
DPC: Destination point code
H0H1: H0/H1 heading code
LSN: Linkset name. The name must be unique.
MULT: SCCP management message multiplicity indicator
OPC: Origination point code
PC: Point code for the SS7 end user (OPC).
SCCP MT: SCCP message type
SCMG: SCCP management message
SIO: Service information octet
SR: Screening reference name
SSN: Subsystem number
TN: Telephone number
TYPE: SCCP management message type

Alarm Level: No alarm condition. The message is informational only.

Recovery

If MSUs are frequently discarded, there may be a problem on the origination end.
To determine the number of MSUs that are discarded because the MSU is too large to be encapsulated, enter the following command:

rept-meas:type=systot:enttype=stp:period=last
Check the DTAMSULOST report in the output message.
If the number of discarded MSUs is low, no further action is necessary. If large quantities are MSUs are lost, the originating node may need to be reconfigured.