Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.1.x

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Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.1.x

Configure a transport layer security tunnel

Updated: April 10, 2026

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Configure a transport layer security tunnel to enable secure communication between devices.

Establish a secure TLS tunnel to protect data exchanged between network devices.
Use this procedure when you need to secure traffic between devices using a TLS tunnel, typically in environments requiring encrypted communication for compliance or security reasons.

Procedure

1.

Enter global configuration mode.

Example:

Device# configure terminal
2.

Configure a crypto TLS tunnel channel.

Example:

Device(config)# crypto tls-tunnel TLS-tunnel-name

Example:

Device(config)# crypto tls-tunnel cloud-primary
3.

Specify the server IPv4 address, IPv6 address, or URL name and the port number.

Example:

Device(config-crypto-tls-tunnel)# server ipv4 server-ipv4-address port port-number

Example:

Device(config-crypto-tls-tunnel)# server ipv4 172.31.255.255 port 4043

The server can be specified as an IPv4 address, IPv6 address, or URL. The port number must be in the range 1025-65535.
4.

Specify the overlay interface and interface number.

Example:

Device(config-crypto-tls-tunnel)# overlay interface interface-name

Example:

Device(config-crypto-tls-tunnel)# overlay interface Loopback0

An overlay interface is a logical, multiaccess, multicast-capable interface. It encapsulates Layer 2 frames in IP unicast or multicast headers.
5.

Specify the LAN interface type, number, and the priority rank.

Example:

Device(config-crypto-tls-tunnel)# local-interface interface-name priority priority-rank

Example:

Device(config-crypto-tls-tunnel)# local-interface vlan 1 priority 1

Currently, the tunnel supports only one WAN interface with priority 1 and does not support the list of WAN interfaces with multiple priorities.
6.

Specify a preshared key and password options.

Example:

Device(config-crypto-tls-tunnel)# psk id identity key psk-key

Example:

Device(config-crypto-tls-tunnel)# psk id test key
7.

Specify the trustpoints for use with the RSA signature authentication method.

Example:

Device(config-crypto-tls-tunnel)# pki trustpoint trustpoint-label sign-or-verify

Example:

Device(config-crypto-tls-tunnel)# pki trustpoint tsp1 sign

Use the certificate from the trustpoint for signing or verifying. If the sign or verify keyword is not specified, the trustpoint is used for both signing and verification. Authentication can be done using either pre-shared key (PSK) or PKI (certificate based).
8.

(Optional) Enable common criteria mode (FIPS mode).

Example:

Device(config-crypto-tls-tunnel)# cc-mode

Indicates a common criteria mode, which is a Federal Information Processing Standards (FIPS) mode.
9.

Enable the TLS tunnel.

Example:

Device(config-crypto-tls-tunnel)# no shutdown
10.

Return to privileged EXEC mode.

Example:

Device(config-crypto-tls-tunnel)# end
The TLS tunnel is now configured and enabled, providing secure encrypted communication between devices.