Table of MTUs of Common Media
Note: the MTUs in this section are given as the maximum size of IP packet that can be transmitted without fragmentation - including IP headers but excluding headers from lower levels in the protocol stack. The MTU must not be confused with the minimum datagram size that all hosts must be prepared to accept, which has a value of 576 for IPv4 and of 1280 for IPv6.
| Media | Maximum Transmission Unit (bytes) | Notes |
|---|---|---|
| Internet IPv4 Path MTU | At least 68 | Practical path MTUs are generally higher. IPv4 links must be able to forward packets of size up to 68 bytes. Systems may use Path MTU Discovery to find the actual path MTU. This should not be mistaken with the packet size every host must be able to handle, which is 576. |
| Internet IPv6 Path MTU | At least 1280 | Practical path MTUs are generally higher. Systems must use Path MTU Discovery to find the actual path MTU. |
| Ethernet v2 | 1500 | Nearly all IP over Ethernet implementations use the Ethernet V2 frame format. |
| Ethernet with LLC and SNAP, PPPoE | 1492 | |
| Ethernet Jumbo Frames | 1500-9000 | The limit varies by vendor. For correct interoperation, the whole Ethernet network must have the same MTU. Jumbo frames are usually only seen in special purpose networks. |
| WLAN (802.11) | 7981 | |
| Token Ring (802.5) | 4464 | |
| FDDI | 4352 |
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