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MACsec

  • Automatic adjustment of MTU for MACsec overhead (MX304, MX960, MX2020, MX10003, and MX10008)—Use this feature to automatically adjust the maximum transmission unit (MTU) for the Media Access Control Security (MACsec) overhead. Without this feature, you must adjust the interface MTU and the protocol MTU manually.

    Use this feature to ensure the interface or protocol MTU is adjusted properly to account for the MACsec overhead. This feature is disabled by default. To enable this feature, first enable MACsec. Then configure the enable-auto-mtu-update statement at the [edit security macsec] hierarchy level. This feature applies to physical interfaces, logical interfaces, and physical interfaces that are members of aggregated Ethernet interfaces.

    [See Media MTU and Protocol MTU.]