Hey guys
so I’m a bit confused about MRU. im quite familiar with MTU but MRU, not that much. the default value of MRU for pppoe client on ROSv5 is 1480 (just like MTU). but after connecting, i can see that in the status page, the link MRU seems to be 1492. so should i set it to 1492 or should i leave it to the default value?
Also, from what i undersatnd, the MSS for TCP syn flag should be 40 bytes less than the actual MTU/MRU. but even with MRU set to 1480, i can see the dynamic mangle rule is set to 1452 (1492-40) for output packets. the MSS for TCP syn flag value for incoming packets however seems to be right and is set to 1440.
would someone please put some light on this subject?
Ok. thank you i will.
But what about MSS? I’m tempted to also create a static rule above the dynamic ones and set also outgoing tcp syn packets MSS to 1440. it seems to me that i might run into problems with MRU set to 1480 and out packets MSS to 1452. what do you think?
Edit: after playing a bit with MTU/MRU I came to the conclusion that it seems w/e you set the MRU, the status still shows 1492. so im gonna leave the value to the default for both MRU and MSS.
hello, recently implemented the use pppoe in the same network I have dhcp, pppoe to activate the change-mss my router, RB1100, left with almost 100% cpu load on, implement a single rule for global change the mss, this affects customers as the pppoe dhcp, the question is whether this can cause my network is slower place, the MTU and MRU values I have in the pppoe-server is 1410 this value is too low? mss and changed it to 1370. a common problem is that there are pages that appear without images.
if someone can guide me a bit I would appreciate.
