IPv6 MTU

The IPv6 maximum transmission unit (MTU) is the maximum length of an IPv6 packet that can be transmitted on a particular interface. If an IPv6 packet is longer than an MTU, the host that originated the packet fragments the packet and transmits its contents in multiple packets that are shorter than the configured MTU.

By default, in non-jumbo mode, the default and maximum Ethernet MTU size is 1500 bytes. When jumbo mode is enabled, the default Ethernet MTU size is 9216. The maximum Ethernet MTU size is 10178.

For ICX 7850 devices, the maximum jumbo frame size supported is 9380 bytes. When jumbo mode is enabled, the maximum ethernet MTU size is 9358 bytes.

In this section:

  1. Configuration Notes and Feature Limitations for IPv6 MTU
  2. Changing the IPv6 MTU
    IPv6 MTU changes are performed on individual interfaces.
Parent topic: IPv6 Addressing