The table below lists
the TrustSec features to be eventually implemented on TrustSec-enabled Cisco
switches. Successive general availability releases of TrustSec will expand the
number of switches supported and the number of TrustSec features supported per
switch.
Cisco TrustSec Feature
|
Description
|
802.1AE Tagging (MACsec)
|
Protocol for
IEEE 802.1AE-based wire-rate hop-to-hop Layer 2 encryption.
Between
MACsec-capable devices, packets are encrypted on egress from the transmitting
device, decrypted on ingress to the receiving device, and in the clear within
the devices.
This
feature is only available between TrustSec hardware-capable devices.
Note
|
This feature is not supported on Catalyst 3850 and Catalyst 3650 switches with Cisco IOS XE Denali 16.1.1
|
|
Endpoint Admission Control (EAC)
|
EAC is an
authentication process for an endpoint user or a device connecting to the
TrustSec domain. Usually EAC takes place at the access level switch. Successful
authentication and authorization in the EAC process results in Security Group
Tag assignment for the user or device. Currently EAC can be 802.1X, MAC
Authentication Bypass (MAB), and Web Authentication Proxy (WebAuth).
|
Network Device Admission Control (NDAC)
|
NDAC is an
authentication process where each network device in the TrustSec domain can
verify the credentials and trustworthiness of its peer device. NDAC utilizes an
authentication framework based on IEEE 802.1X port-based authentication and
uses EAP-FAST as its EAP method. Successful authentication and authorization in
NDAC process results in Security Association Protocol negotiation for IEEE
802.1AE encryption.
|
Security Group Access Control List (SGACL)
|
A Security
Group Access Control List (SGACL) associates a Security Group Tag with a
policy. The policy is enforced upon SGT-tagged traffic egressing the TrustSec
domain.
In Cisco IOS XE Fuji 16.8.1, IPv6 support was enabled for SGACL enforcement and logging of VRF name was enabled in SGACL logs.
|
Cisco TrustSec SGACL High Availability
|
Cisco TrustSec Security Group access control lists (SGACLs)
support the high availability functionality on switches that support the Cisco
StackWise technology. Cisco StackWise technology provides stateful redundancy
and allows the switch stack to enforce and process access control entries.
There is no Cisco TrustSec-specific configuration to enable
this functionality.
This feature is supported only on Catalyst 3850 and 3650 Series Switches from Cisco IOS XE Release Denali 16.2.1 and higher.
|
Security Association Protocol (SAP)
|
After NDAC
authentication, the Security Association Protocol (SAP) automatically
negotiates keys and the cipher suite for subsequent MACSec link encryption
between TrustSec peers. SAP is defined in IEEE 802.11i.
Note
|
This feature is not supported on Catalyst 3850 and Catalyst 3650 switches with Cisco IOS XE Denali 16.1.1
|
|
Security Group Tag (SGT)
|
An SGT is a
16-bit single label indicating the security classification of a source in the
TrustSec domain. It is appended to an Ethernet frame or an IP packet.
In Cisco IOS XE Fuji 16.8.1, Layer 2 Inline Tagging is supported for IPv6 multicast traffic with unicast source IPv6 addresses.
|
SGT Exchange
Protocol (SXP)
|
Security
Group Tag Exchange Protocol (SXP). With SXP, devices that are not
TrustSec-hardware-capable can receive SGT attributes for authenticated users
and devices from the Cisco Identity Services Engine (ISE) or the Cisco Secure
Access Control System (ACS). The devices can then forward a sourceIP-to-SGT
binding to a TrustSec-hardware-capable device will tag the source traffic for
SGACL enforcement.
|
When both ends of a
link support 802.1AE MACsec, SAP negotiation occurs. An EAPOL-key exchange
occurs between the supplicant and the authenticator to negotiate a cipher
suite, exchange security parameters, and manage keys. Successful completion of
these tasks results in the establishment of a security association (SA).
Depending on your software version and licensing and link hardware support, SAP negotiation can use one of these modes of
operation:
-
Galois Counter Mode (GCM)—authentication and encryption
-
GCM authentication (GMAC)— GCM authentication, no encryption
-
No Encapsulation—no encapsulation (clear text)
-
Null—encapsulation, no authentication or encryption