MTU

Cisco IOS: show system mtu

Change configuration on Linux:

• ip link set dev eth0 mtu 9000 (Jumbo frames)

• ping -M do -s 9000 <some_ip_address>

Select Path MTU Discovery strategy. hint may be either do (prohibit fragmentation, even local one), want (do PMTU discovery, fragment locally when packet size is large), or don't (do not set DF flag).

Related terms

• Jumbo frames

See also

• Ethernet: MII, MDI, bonding, etherchannel, STP, ARP, MAC, STP, Jumbo frames, 802.1X, MTU, Ethernet In-Band Access (IBA), LACP, Multicast, Broadcast, SPI