Hi Atma,
Unfortunately, mesh is still not supported on R310.
One of the major reason is, it's hardware design and having just one eth port.
If mesh is important for you, please buy another AP model like R510 or R610.
Regards,
Syamantak Omer
Syamantak Omer | Sr.Staff TSE | CWNA | CCNA | RASZA | RICXI