An option to override the mtu negotiated by the PPPoE peer?

[CGGXANNX]

Make sure you have at least 7.20 installed for the workaround to work. This is the associated changlog item:

@EdPa

• ppp - do not send initial echo request if keepalive-timeout=disabled;

Here is the thread that followed the issue until MikroTik introduced the workaround:

PPPOE MTU ALWAYS DEFAULTS TO 1480 INSTEAD OF 1492

Disabling Keepalive Timeout also disables MRU Test on RouterOS, since no tests are conducted, the MTU value never drops to 1480, a value picked by RouterOS when no Echo-Replies are received. Yes, I also think these configuration should be separated, one should be able to keep the router sending PPPoE Keepalive Echo-Requests, without changing MTU value, even if large Echo-Request packets result in no Echo-Reply packet returns.