MACsec key management modes
The following table describes the main key management modes in MACsec.
Keying | Description | 7705 SAR support | Where used |
---|---|---|---|
Static SAK |
Manually configures each node with a static security association key (SAK), SAM, or CLI |
Switch to switch |
|
Static CAK PRE SHARED KEY |
Uses a dynamic MACsec key agreement (MKA) and a configured pre-shared key to drive the connectivity association key (CAK) The CAK encrypts the SAK between two peers and authenticates the peers. |
✓ |
Switch to switch |
Dynamic CAK EAP authentication |
Uses a dynamic MKA and an EAP master system key (MSK) to drive the CAK The CAK encrypts the SAK between two peers and authenticates the peers. |
Switch to switch |
|
Dynamic CAK MSK distribution via RADIUS and EAP-TLS |
Stores the MSKs in the RADIUS server and distributes to the hosts via EAP-TLS. This is typically used in access networks where a large number of hosts use MACsec and connect to an access switch. MKA uses MSK to drive the CAK. The CAK encrypts the SAK between two peers and authenticates the peers. |
Host to switch |