interface vlanif 10 mtu 1492 commit Tunnel MTU should be at least 24-28 bytes lower than physical MTU to accommodate encapsulation headers.
End of Report
save y | Issue | Likely Cause | Solution | |-------|--------------|----------| | MTU change not applied | Missing commit command | Run commit in interface view | | Traffic still fragmented | Path MTU discovery (PMTUD) blackhole | Lower MTU further or enable ip mtu ignore-df (use carefully) | | SSH/VPN failing after change | MTU too high for encapsulation | Reduce MTU by 40–60 bytes | 7. Rollback Procedure To revert to default MTU (1500): how to change mtu on huawei router
system-view interface gigabitethernet 0/0/1 mtu 1492 commit # Required on some Huawei VRP versions quit For Layer 3 VLAN interfaces: interface vlanif 10 mtu 1492 commit Tunnel MTU
