FAQ What is the optimum MTU size can be configured based on Back Plane to not get any packet drop ?
Equipment type & Version :
NE80E , Version V300R003C02B697
Theoritically , NE80E can support from 64 to 9600 MTU size, I got doubt from custome that if the MTU should by multiple of 58 otherwise it will be dropped from the backplane as for example if MTU size is 1600 , the result of 1600/58= 27.58 .
The traffic received from interface will follow this procedure :
Interface > NP-->TM-->SFU-->back plane --> SFU --> TM-->NP-->Interface ,
1) The acutal payload should be 58 byte . NP will devide the packet into 58 and add NP header to exapnd the size to 64 byte .
2) Traffic Management Chip ( TM ) used to handle special size of segments ( 64 Byte ) . so even if the traffic is small , the NP will add header to make the size reach 64 .
3) After the data segment is processed by the backplan , it will reconstructed at the out going NP .
For example :
If the a packet with MTU size is 1600 byte , it will be divided for 1600/58 = 27.5862 .
Then , 27.5862+x=64 , it will be handled by the TM . where x will be the data which is added.
There is no packet loss or dropped what ever the size of the MTU was , that is kown as non stopping forwarding .