since i update MT RB5009 from 17.4.2 to 17.4.3
i have an issue with mtu ( invalid mtu 1492 on pppoe-out1 from fe80::200:5eff:fe00:103)
What is the causing of this problem?
with v17.14.2 i didn't get this issue
???????????17.14.2
C:\Windows>mtupath -4 google.it MTU path scan to google.it (142.251.143.163), ttl=64, limit=48 # 16 processing - best MSS 1472 (estimated MTU 1500) [pPPPPpPppPpppppp] # 01 nearest minimum MTU on local interface #1 MSS IN RANGE 1 <== 1471 ==> 1472 #2 MSS EXCEEDED 1473 <== 14911 ==> 16384 C:\Windows>mtupath -6 google.it MTU path scan to google.it (2a004002:411::2003), ttl=64, limit=48 # 16 processing - best MSS 1452 (estimated MTU 1500) [uUUUUuUuuUuUuUuu] # 01 nearest minimum MTU on local interface #1 MSS IN RANGE 1 <== 1451 ==> 1452 #2 MSS EXCEEDED 1453 <== 14931 ==> 16384Example on windows.
ping -f -l 1472 google.com
radvd: invalid mtu 1492 on pppoe-out1 from fe80::200:5eff:fe00:103