Why the traffic cannot be forwarded when the interfaces of the 1E1/2E1 cards are bound in the MP method by using the mp-group

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In scenarios where the interfaces of the 1E1T1-M/2E1T1-M/1E1T1-F/2E1T1-F cards are bound in the MP method by using the mp-group, a 4-byte MP packet header needs to be added to the IP address, and when the size of the IP packet sent through the interface is 1596 bytes, the total packet size exceeds the processing capacity of the interface (1596 bytes), therefore, the traffic cannot be forwarded.

In this case, you are advised to set the MTU value of the interfaces of 1E1T1-M/2E1T1-M/1E1T1-F/2E1T1-F to 1592 bytes.

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