The IPv6 maximum transmission unit (MTU) is the maximum length of an IPv6 packet that can be transmitted on an 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 MTU.
There are limitations on MTU. The following table lists the MTU Profile Counts for various devices.
| Platform | L3 MTU Profile Count | Description |
|---|---|---|
| SLX 9150/SLX 9250 | 8 | 1 Default MTU (1500), 7 user-defined profiles |
| SLX 9540/SLX 9640 | 3 | 1 Default MTU (1500), 2 user-defined profiles |
| SLX 9740 | 7 | 1 Default MTU (1500), 5 user-defined profiles, 1 GRE Tunnel (1476) |
%Error: Maximum limit of allowed different IP MTUs reached.
The hardware supports one MTU value at the interface.