Feature Explorer AI 
×
MACsec adds a header to packets passing through interfaces
where MACsec is enabled. If a packet is near the protocol MTU limit, and the
MTU is not adjusted to account for the MACsec header, the packet can exceed the
interface MTU when the MACsec header is added. In that case, the device drops
the packet. Before enabling MACsec, you must ensure your protocol MTU is large
enough to accommodate the additional 32 bytes of MACsec overhead.
| Feature hierarchy | Feature Name |
|---|---|
| Automatically adjust MTU to include MACsec header (protocol families) / | Bridge family: Automatically adjust MTU to include MACsec header |
| Automatically adjust MTU to include MACsec header (protocol families) / | CCC Family: Automatically adjust MTU to include MACsec header |
| Automatically adjust MTU to include MACsec header (protocol families) / | IPv4 Family: Automatically adjust MTU to include MACsec header |
| Automatically adjust MTU to include MACsec header (protocol families) / | IPv6 Family: Automatically adjust MTU to include MACsec header |
| Automatically adjust MTU to include MACsec header (protocol families) / | ISO Family: Automatically adjust MTU to include MACsec header |
| Automatically adjust MTU to include MACsec header (protocol families) / | VPLS Family: Automatically adjust MTU to include MACsec header |