Basic Attributes

The Multilink PPP, also ML-PPP or MP, indicates that multiple point-to-point protocol (PPP) links are bundled and used. In the case of the ML-PPP, several ports that adopt the PPP encapsulation are bundled into one logical port to increase the transmission bandwidth. The ML-PPP allows that packets be divided into fragments, which are transported over several PPP links to the same destination. In this interface, you can query and set the basic attributes of the MP group.

Navigation Path

For RTN NEs, in the NE Explorer, click the NE and choose Configuration > Interface Management > MP Group Management from the Function Tree. Click the Basic Attributes tab.

Guideline

The ML-PPP function benefits the network in the following aspects: Bandwidth increased, load shared and backed up and delay shortened by fragments.

The ML-PPP protocol focuses on the transmission of fragments of data packets over multiple data links, reassembly and sequence of these fragments.

NOTE:

E1 interfaces on which PPP is enabled must be created.
The E1 Frame Format of the local MP group and the opposite MP group should be consistent.
The MP group can be bound only with the E1 interfaces of the same board.
Deleting the member interface of the MP group may damage the service.
The member interface in the same MP group must have the same frame mode. That is, the values of Frame Mode are all 30 or 31.

Buttons

Button	Description
Configuration	Configure the member interfaces.
Reset	Reset the MP group. This operation interrupts the service.
Running Status	Query the running status of the selected MP group.
Query Status	Query the running status of the selected PPP link.

Shortcut Menu Items

Item	Description
Browse Current Alarms	View the current alarms of the specified MP group.
Browse Historical Alarms	View the history alarms of the specified MP group.
Alarm Suppression	Set the alarm suppression status of the specified MP group.
Browse Performance	View the performance data of the specified MP group.
Performance Statistics Management	Manage the performance events.

Parameters

**Table 1** Descriptions of the parameters for MP Group General Attributes
Field	Value	Description
MP Group Number	For example: 1	Set the MP group number.
Name	For example: MP_1	Set the name of the MP.
Link Status	Up, Down	Display the link status.
Send Rate (kbit/s)	-	This parameter is not supported now.
Receive Rate (kbit/s)	-	This parameter is not supported now.
Min Activated Link Count	1 to 16	Configure the minimum activated link count for each MP group. The MP group can be activated only when the count of activated links in the MP group reaches the minimum activated link count.
Enable Differential Delay	Enabled, Disabled	Enable or disable detection of the differential delay.
Max Differential Delay (100us)	25 to 500	Set the maximum delay variation between links in an MP group. This parameter can be set only when Enable Differential Delay is set to Enabled.
Enable Tunnel	Disabled, Enabled Default: Disabled	After the Tunnel is enabled, the port can identify and process the MPLS label, and thus supports the dynamic signaling and route.
Max Reserved Bandwidth (kbit/s)	For example: 4096	Set the maximum bandwidth used by the tunnel. The maximum reserved bandwidth should not exceed the physical bandwidth of the bearer port.
TE Measurement	0 to 16777215	Sets the TE measurement. You can intervene in the route selection by adjusting the TE measurement of the link. The smaller the value of the TE measurement, the higher the priority of the link. Thus, the traffic congestion of the shortest path that occurs in the traditional route selection can be avoided.
Admin Group	0 to 4294967295	Sets the admin group. The admin group can specify the link attributes. After the affinity attributes of a dynamic tunnel is configured, when the dynamic tunnel selects links, the dynamic tunnel compares its affinity attributes with the admin attributes of links and determines which links to be avoided.
IP Address Negotiation Result	For example: 192.168.0.1	Display the negotiated IP address.
IP Mask Negotiation Result	For example: 255.255.255.0	Display the negotiated IP mask.
Fragmentation Size (bytes)	64, 128, 256, 512, Unfragmented	Select the fragmentation size.
Sequence Number Type	Long Serial Number, Short Serial Number, Huawei mode Default: Huawei mode	Select the type of sequence number: Long Serial Number: The sequence number field has 24 bits. Short Serial Number: The sequence number field has 12 bits. NOTE: The ports at both ends must have the same settings of Sequence Number Type.
Interface	For example: Slot-Board Name-Port (Port No.)	Select the members in the MP group.
PPP Link Status	Up, Down	Display the link status.
Differential Delay Check Status	Unknown, Valid, Invalid	Display the status of checking the differential delay.
Specify IP	Manually, Unnumbered NE IP, Unnumbered Interface IP, Unspecified	Select the means of setting the IP address for the port.
IP Address	For example: 192.168.0.1	Set the IP address for the port. This parameter can be set only when Specify IP is set to Manually.
IP Mask	For example: 255.255.255.0	Set the subnet mask of the port. This parameter can be set only when Specify IP is set to Manually.
IP Unnumbered Board	For example: Slot-Board Name	Select the board for the unnumbered IP address. This parameter can be set only when Specify IP is set to Manually.
IP Unnumbered Port	For example: Slot-Board Name-Port (Port No.)	Select the port for the unnumbered IP address. This parameter can be set only when Specify IP is set to Manually.
MTU (bytes)	For example: 1620	Indicate the maximum transport unit. When the length of a packet received by a port is greater than the set MTU value, this packet will be discarded.
OSICP Negotiation	-	This parameter is not supported now.
Send CRC BER Threshold-crossing Event	Enabled, Disabled	With Enabled selected, when the CRC BER of a PPP member link in an MP group exceeds its threshold, the MP group automatically deletes the member link.
ECHO Packet Sending Period (s)	1 to 10	Specifies the period of sending ECHO packets. If the echo packet transmission period configured on both ends of the ML-PPP link is not the default value (10s), the maximum number of PPP links configured on a device cannot exceed the limit.