Configuring Cisco Trustsec Switch-To-Switch Link Security In Manual Mode - Cisco Catalyst 4500 Series Configuration Manual

Configuring Cisco TrustSec MACsec
Command
Step 5
exit
Step 6
end
Step 7
show cts interface
]
| summary
Step 8
copy running-config startup-config
This example shows how to enable Cisco TrustSec authentication in 802.1X mode on an interface using
GCM as the preferred SAP mode:
Switch# configure terminal
Switch(config)# interface tengigabitethernet 1/1/2
Switch(config-if)# cts dot1x
Switch(config-if-cts-dot1x)# sap mode-list gcm-encrypt null no-encap
Switch(config-if-cts-dot1x)# exit
Switch(config-if)# end

Configuring Cisco TrustSec Switch-to-Switch Link Security in Manual Mode

If your switch does not have access to an authentication server or if 802.1X authentication is not needed,
you can manually configure Cisco TrustSec on an interface. You must manually configure the interface
on each end of the connection.
When manually configuring Cisco TrustSec on an interface, consider these usage guidelines and
restrictions:
•
•
•
To manually configure Cisco TrustSec on an interface to another Cisco TrustSec device, perform this
task:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
cts manual
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
43-12
[
interface-id | brief
If no SAP parameters are defined, Cisco TrustSec encapsulation or encryption is not performed.
If you select GCM as the SAP operating mode, you must have a MACsec Encryption software
license from Cisco. If you select GCM without the required license, the interface is forced to a
link-down state.
These protection levels are supported when you configure SAP pairwise master key (sap pmk):
SAP is not configured—no protection.
–
sap mode-list gcm-encrypt gmac no-encap—protection desirable but not mandatory.
–
sap mode-list gcm-encrypt gmac—confidentiality preferred and integrity required. The
–
protection is selected by the supplicant according to supplicant preference.
sap mode-list gmac—integrity only.
–
sap mode-list gcm-encrypt—confidentiality required.
–
sap mode-list gmac gcm-encrypt—integrity required and preferred, confidentiality optional.
–
Purpose
Exits Cisco TrustSec 802.1X interface configuration mode.
Returns to privileged EXEC mode.
(Optional) Verifies the configuration by displaying TrustSec-related
interface characteristics.
(Optional) Saves your entries in the configuration file.
Purpose
Enters global configuration mode.
Enters interface configuration mode.
Enters Cisco TrustSec manual configuration mode.
Chapter 43 Configuring MACsec Encryption
OL-25340-01