A configuration command that adds an M3UA link. The following key parameters must be negotiated with the peer MSC:
Local Port No.
Destination Port No.
First Local IP Address
Second Local IP Address
First Destination IP Address
Second Destination IP Address
Signaling Link Priority
RTO Max Value[ms]
RTO Min Value[ms]
RTO Initial Value[ms]
RTO ALPHA Value[%]
RTO BETA Value[%]
Heart Beat Interval[ms]
Association Max Retrans
Path Max Retrans
No Congestion Level
Low Congestion Level
High Congestion Level
Calculate Checksum When Send Message
Calculate Checksum When Receive Message
Checksum Arithmetic
1. There must be an M3UA link set, and a maximum of 16 M3UA links can be established in an M3UA link set.
2. The subrack must be bound with the originating signaling point.
3. First Local IP Address must be different from Second Local IP Address; First Destination IP Address must be different from Second Destination IP Address; Local Port No. must be different from Destination Port No.; RTO Max Value[ms] must be greater than RTO Initial Value[ms]; RTO Max Value[ms] must be greater than RTO Min Value[ms]; RTO ALPHA Value[%] must be smaller than RTO BETA Value[%]; Association Max Retrans must be smaller than Path Max Retrans multiplied by 2; Low Congestion Level must be greater than or equal to No Congestion Level and must be smaller than or equal to High Congestion Level.
4. A maximum of 8 M3UA links can be configured for the subrack.
5. The GMPS/GEPS must have been configured with the GXPUM.
| ID | Name | Description |
|---|---|---|
| SIGLKSIDX | Signalling link set index | Meaning:Signalling link set index Value range:0~128 Explanation: This parameter specifies the index of the link set. This index is unique. Default value:None |
| SRN | Subrack No. | Meaning:Subrack No. Value range:0~11 Explanation: This parameter specifies the subrack number of the GXPUM/GXPUT where the M3UA link locates. Default value:None |
| LOCPN | Local Port No. | Meaning:Local Port No. Value range:1~65535 Explanation: This parameter specifies the local SCTP port number of the M3UA link. Default value:None |
| PEERPN | Destination Port No. | Meaning:Destination Port No. Value range:1~65535 Explanation: This parameter specifies the peer SCTP port number of the M3UA link. Default value:None |
| LOCIP1 | First Local IP Address | Meaning:First Local IP Address Value range:0.0.0.0-255.255.255.255 Explanation: This parameter specifies the local address 1 used by the M3UA link. Default value:None |
| LOCIP2 | Second Local IP Address | Meaning:Second Local IP Address Value range:0.0.0.0-255.255.255.255 Explanation: This parameter specifies the local address 2 used by the M3UA link. Default value:None |
| PEERIP1 | First Destination IP Address | Meaning:First Destination IP Address Value range:0.0.0.0-255.255.255.255 Explanation: This parameter specifies the peer address 1 used by the M3UA link. Default value:None |
| PEERIP2 | Second destination IP address | Meaning:Second destination IP address Value range:0.0.0.0-255.255.255.255 Explanation: This parameter specifies the peer address 2 used by the M3UA link. Default value:None |
| PRIORITY | Signalling Link Priority | Meaning:Signalling Link Priority Value range:0~254 Explanation: This parameter specifies the priority of signaling link. The link with high priority is preferred when the link is selected. Default value:0 |
| RTOMAX | RTO Max Value[ms] | Meaning:RTO Max Value[ms] Value range:1000~60000 Explanation: This parameter specifies the RTO, that is the maximum time length of retransmission timeout. Default value:1500 |
| RTOMIN | RTO Min Value[ms] | Meaning:RTO Min Value[ms] Value range:1000~60000 Explanation: This parameter specifies the RTO, that is the minimum time length of retransmission timeout. Default value:1000 |
| RTOINIT | RTO Initial Value[ms] | Meaning:RTO Initial Value[ms] Value range:1000~60000 Explanation: This parameter specifies the RTO, that is the initial time length of retransmission timeout. Default value:1000 |
| RTOALPHA | RTO ALPHA Value[%] | Meaning:RTO ALPHA Value[%] Value range:0~100 Explanation: This parameter specifies the Alpha parameter used to calculate and update the RTO value. This parameter is a percentage. if the value is 12, it indicates the RTO Alpha parameter is 0.12. Default value:12 |
| RTOBETA | RTO BETA Value[%] | Meaning:RTO BETA Value[%] Value range:0~100 Explanation: This parameter specifies the Beta parameter used to calculate and update the RTO value. This parameter is a percentage. if the value is 25, it indicates the RTO Beta parameter is 0.25. Default value:25 |
| HBINTER | Heart Beat Interval[ms] | Meaning:Heart Beat Interval[ms] Value range:1000~60000 Explanation: This parameter specifies the heartbeat interval. For example, if this parameter is set to 5000, when the SCTP association does not send the data to a certain IP address within the setting time, the SCTP association will send the heartbeat message to this IP address for checking whether the remote IP address is activated.??. Default value:2000 |
| MAXASSOCRETR | Association Max Retrans | Meaning:Association Max Retrans Value range:0~255 Explanation: This parameter specifies the maximum retransmission times of an SCTP association. For example, this parameter is set to 10 and the continuous retransmission of SCTP association exceeds 10 times, the peer end point is thought to be unreachable so that the SCTP association is canceled automatically. A report is sent to the upper-level users. Default value:5 |
| MAXPATHRETR | Path Max Retrans | Meaning:Path Max Retrans Value range:0~255 Explanation: This parameter specifies the maximum message retransmission times of an address. If the continuous retransmission of a certain address exceeds this value, this address is thought to be unreachable. Default value:3 |
| CNGLEVELNO | No Congestion Level | Meaning:No Congestion Level Value range:0~100 Explanation: This parameter specifies the non-congestion level and is a percentage. For example, if this parameter is set to 40 and when the ratio of the sending buffer on busy to the total sending buffer is less than 0.4, the SCTP association is in non-congestion status. Default value:40 |
| CNGLEVELLOW | Low Congestion Level | Meaning:Low Congestion Level Value range:0~100 Explanation: This parameter specifies low congestion level and is a percentage. For example, if this parameter is set to 60 and when the ratio of the sending buffer on busy to the total sending buffer is more than 0.6, the SCTP association is in low congestion.The calculation starts from the non-congestion status. Default value:60 |
| CNGLEVELHIGH | High Congestion Level | Meaning:High Congestion Level Value range:0~100 Explanation: This parameter specifies high congestion level and is a percentage. For example, if this parameter is set to 80 and when the ratio of the sending buffer on busy to the total sending buffer is more than 0.8, the SCTP association is in high congestion. Default value:80 |
| CHKSUMTX | Calculate Checksum When Send Message | Meaning:Calculate Checksum When Send Message Value range:NO,YES Explanation: This parameter specifies whether to calculate the checksum when the SCTP message is sent. Default value:NO |
| CHKSUMRX | Calculate Checksum When Receive Message | Meaning:Calculate Checksum When Receive Message Value range:NO,YES Explanation: This parameter specifies whether to check the checksum when the SCTP message is received. Default value:NO |
| CHKSUMTYPE | Checksum Arithmetic | Meaning:Checksum Arithmetic Value range:ALDER32,CRC32 Explanation: This parameter specifies the SCTP checksum algorithm. The SCTP protocol stack supports two checksum algorithms: CRC32 and ADLER32. Select one on the basis of the application. The SCTP checksum algorithm should be same as that of peer end. Default value:CRC32 |
| WORKMODE | Work Mode | Meaning:Work Mode Value range:SERVER,CLIENT Explanation:This parameter indicates the work mode (strategy) of the clock source. In Free Run mode, clock source 0 is set to the clock source for the GGCU. The system generally uses Automatic mode. The Manual mode is generally used for test purposes. Default value:CLIENT |