This chapter describes the maximum transmission unit (MTU) on Cisco 8000 Series Routers, including Ethernet MTU that governs the largest frame size on the Ethernet network, IP MTU that governs the largest IP packet size without fragmentation, MTU checks and scale limits, platform-specific configuration guidelines, and the procedure to configure IPv4 and IPv6 MTU on an interface.
Ethernet MTU
This topic describes Ethernet Maximum Transmission Unit (MTU), fragmentation, and MTU discovery processes for Cisco IOS XR software-based network configurations.
IP MTU
This topic defines IP MTU, explains differences from Ethernet MTU, provides calculation guidelines, and introduces Maxinum Receive Unit (MRU) for Cisco routers.