Jan 27, 2017
By default, all interfaces have an MTU of 1500 bytes. You can modify this on an interface: Viptela(config-vpn)# interface interface-name mtu bytes. The MTU can range from 576 through 2000 bytes. To display an interface's MTU, use the show interface command. For vBond, vManage, and vSmart devices, you can configure interfaces to use ICMP to IP - MTU and fragmentation Also R3's R2-facing interface has an MTU of 1500 bytes. Since the packet is destined for R3 and exceeds the MTU of the ingress interface AND has the df set I believe this results in a '.' and not a 'M'. Once again if you wish to see the M then modify the MTU on R2's R3-facing interface such that the IP datagram from R1, to R3, is too large for MTU parameters usually appear in association with a communications interface (NIC, serial port, etc.). Standards ( Ethernet , for example) can fix the size of an MTU; or systems (such as point-to-point serial links) may decide MTU at connect time.
Jun 21, 2020
MTU And change connection's MTU limit Nov 06, 2014 FD.io VPP: Interface The ' set interface mac address ' command allows to set MAC address of given interface. In case of NIC interfaces the one has to support MAC address change. A side effect of MAC address change are changes of MAC addresses in FIB tables (ipv4 and ipv6).
Configure MTU to maximize network performance
MTU And change connection's MTU limit Nov 06, 2014 FD.io VPP: Interface