Антенна или WDS (20) /

indemion:
Да, есть такая опция в TP: System > Diagnostic Tools. Там можно пингануть с самого роутера. И вот, что получется при пинге Mikrotik :

Pinging 192.168.88.1 with 64 bytes of data:

Reply from 192.168.88.1: bytes=64 time=20 TTL=64 seq=1
Reply from 192.168.88.1: bytes=64 time=64 TTL=64 seq=2
Reply from 192.168.88.1: bytes=64 time=18 TTL=64 seq=3
Reply from 192.168.88.1: bytes=64 time=45 TTL=64 seq=4

Ping statistics for 192.168.88.1
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milliseconds:
Minimum = 18, Maximum = 64, Average = 36

Значит проблема в TP-Link