# Unsupported MLFR Features

E Series routers do not support the following MLFR features:

- Fragmentation

  The router does not support MLFR fragmentation or reassembly. When using MLFR on the router, configure all peer devices so that they do not fragment MLFR frames. The router drops all fragmented frames that it receives.

- Resequencing of out-of-order packets in the absence of fragmentation

  Given the location in the network where the router resides, the NxT1 links to a customer site represent one of many places across the IP network where packets might be received out of order. For example, if the router has multiple uplinks to a core router, packets might be received out of order across these links. Packet resequencing is therefore left as an exercise for the end station rather than the aggregation router.