I'm try to connect to my mikrotik pppoe server from FreeBSD machine but no respond from server
I see this in debug pppoe log

echo: pppoe,debug,packet TEST: TEST: rcvd PADI from 00:1F:5B:E7:AB:4C
echo: pppoe,debug,packet TEST: session-id=0x0000
echo: pppoe,debug,packet TEST: service-name=RC
echo: pppoe,debug,packet TEST: host-uniq=0x80a8404
echo: pppoe,debug TEST: TEST: received PADI, with unsupported service, dropping
echo: pppoe,ppp,debug,packet TEST: <000c>: sent LCP EchoReq id=0x35
echo: pppoe,ppp,debug,packet TEST: <magic 0x36711d8d>
echo: pppoe,ppp,debug,packet TEST: <000c>: rcvd LCP EchoRep id=0x35
echo: pppoe,ppp,debug,packet TEST: <magic 0x5b08264f>

windows machins connect without problems.
why it is so?

the problem is 'unsupported service' =)
what is in 'pppoe,debug,packet TEST: service-name=' when you connect from Windows machine?

but how i can ignore this parameter in server side of mikrotik?
Freebsd mpd doesn't matter what service-name client side send to it

In MikroTik you cannot ignore that option.