If an IPv6 packet is longer than an IP MTU, the host that originated the packet fragments the packet and transmits its contents in multiple packets that are shorter than the IP MTU.
There are limitations on IP MTU. The following table lists the IP MTU Profile Counts for various devices.
| Platform | L3 IP MTU Profile Count | Description |
|---|---|---|
| SLX 9150/SLX 9250/Extreme 8520/Extreme 8720 | 7915 | A maximum of 7915 entries can be configured based on MTU range 1280-9194, (both inclusive). MTU value is stored on the hardware on a per interface basis. |
| SLX 9540/SLX 9640 | 3 | 1 Default IP MTU (1500), 2 user-defined MTU profiles |
| SLX 9740/Extreme 8820 | 7 | 1 Default IP MTU (1500), 5 user-defined MTU profiles, 1 GRE Tunnel (1476) |
%Error: Maximum limit of allowed different IP MTUs reached.
The hardware supports one IP MTU value at the interface.