How to configure the MP-Group of E1 interfaces of AR routers

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MP indicates the Multi-Link Point-to-Point Protocol (MLPPP), in which multiple PPP links are bound together. MP binding is often performed in scenarios where a 2 Mbit/s E1 dedicated line cannot meet the service requirements.
MP interfaces transmit data by packets. AR routers only support the binding of interfaces of the same card.

system-view
[Huawei] interface mp-group 0/0/1 //Create an MP-Group interface and enter the view of the interface.
[Huawei-Mp-group0/0/1] undo discriminator //(Optional) Disable the terminal endpoint identifier negotiation function which is enabled by default. You can disable the function when the interface cannot interconnect with the devices of other manufacturers.
[Huawei-Mp-group0/0/1] ip address 192.168.0.1 24 //You can run the ip address ppp-negotiate command to allow the peer end to allocate the IP address generated through PPP negotiation to the interface.
[Huawei-Mp-group0/0/1] interface serial 2/0/0 //Enter the view of the specified physical interfaces (PPP type)
[Huawei-Serial2/0/0] ppp mp mp-group 0/0/1 //Add the physical interface. You can repeat this step to add multiple interfaces.
[Huawei-Serial2/0/0] restart //Restart the related physical interfaces.

Other related questions:
Can the E1 interface of an AR router interconnect with MP-group interfaces
The E1 interface of an AR router cannot interconnect with MP-group interfaces. The network works properly only when the configurations of the interfaces on both interconnected ends are consistent.

AR router troubleshooting guide: The state of an MP-Group interface cannot be Up
For the problem that the state of an MP-Group interface of an AR router is not Up, see the troubleshooting guide. For details, access the URL in the right column.

How to configure the E1-IMA interface of an AR router
The configuration method of the E1-IMA interface of an AR router is described as follows: You can configure the attributes of the E1-IMA interface if you want to use a single E1-IMA link to bear ATM cells. system-view [Huawei] interface atm 2/0/0 //Enter the view of the E1-IMA interface. [Huawei-Atm2/0/0] clock slave //Set the clock mode to master or slave. The default clock mode is slave [Huawei-Atm2/0/0] frame-format no-crc4-adm//Set the frame format of the interface to CRC4-ADM or No-CRC4-ADM. The default frame format is NO-CRC4 ADM [Huawei-Atm2/0/0] scramble //Enable the load scrambling function of the E1-IMA interface [Huawei-Atm2/0/0] loopback { local | payload | remote } //Configure the loopback method of the E1-IMA interface. The loopback function is disabled by default. The local method indicates that the loopback is performed in the output direction of the device to test whether the local device works properly. The payload method indicates that the loopback is performed on the valid payload in the output direction of the device. The TS0 is not included in the loopback in general. The remote method indicates that the loopback is performed on the input data stream sent by the peer device to test whether the links between the test devices work properly. Run the display interface atm [ interface-number ] command to check the configuration and status of the ATM interface.

How to configure interface groups on AR routers
If users need to perform the same configuration on multiple Ethernet interfaces, they can add the Ethernet interfaces into an interface group. Users only need to run the configuration command of a function once in an inteface group view to configure the function for all Ethernet interfaces included in the interface group. In this way, interfaces can be configured in batches and repeated configurations are reduced. Interfaces can be added into two types of interface groups: permanent interface groups and temporary interface groups, which have the same function. However, a temporary group is automatically deleted by the system after you quit the view of the temporary interface group. Configure a permanent interface group as follows: [Huawei] port-group portgroup1 [Huawei-port-group-portgroup1] group-member ethernet2/0/0 to ethernet2/0/1 //Add interface Eth2/0/0 and interface Eth2/0/1 to the interface group portgroup1. Configure a temporary interface group as follows: [Huawei] port-group group-member ethernet2/0/0 to ethernet2/0/1 //Add interface Eth2/0/0 and interface Eth2/0/1 to a temporary interface group. AR550 series products do not support interface groups.

The ppp-mp interface of an AR router cannot be connected
MP problems of AR routers can be located based on the following roadmap: 1. MP interfaces transmit data by packets, which cannot be modified. 2. AR routers only support the binding of interfaces of the same card. If the binding cannot be performed on cards equipped with two E1 interfaces, perform it on cards equipped with eight E1 interfaces. 3. Focus on member interfaces when locating MP interface problems because most MP interface problems are caused by the member interfaces. 4. In products with earlier versions, out-of-order problems occur on MP interfaces, which results in the stalling of videos. Use products with V200R0003 and later versions. If the state of the E1 interface of an AR router is not Up, check whether the state of the member E1 interface is not Up. If the E1 interface of an AR router cannot communicate with other devices properly, check whether packet losses occur on the member E1 interface.

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