`tacacs-server host`

Syntax

tacacs-server host {<FQDN> | <IPV4> | <IPV6>} [key {plaintext <PASSKEY> |
   ciphertext <PASSKEY>}] [timeout <TIMEOUT-SECONDS>] [port <PORT-NUMBER>]
   [auth-type {pap | chap}] [vrf <VRF-NAME>] 
				
no tacacs-server host {<FQDN> | <IPV4> | <IPV6>} [port <PORT-NUMBER>] [vrf <VRF-NAME>]

Description

Adds a TACACS+ server. By default, the TACACS+ server is associated with the family group named tacacs.

The no form of this command removes a previously added TACACS+ server.

Command context

config

Parameters

host {<FQDN> | <IPV4> | <IPV6>}

Selects an identification for the server to be added.

<FQDN>

Specifies a fully qualified domain name of the TACACS+/RADIUS server to be added.

<IPV4>

Specifies the IPv4 address.

<IPV6>

Specifies the IPv6 address.

key {plaintext <PASSKEY> | ciphertext <PASSKEY>}

Selects either a plaintext or an encrypted local shared-secret passkey for the server. As per RFC 2865, shared-secret can be a mix of alphanumeric and special characters. The length of shared-secret in plaintext format is fewer than 32 characters.

timeout <TIMEOUT-SECONDS>

Specifies the timeout. The range is 1 to 60 seconds. The default timeout is 5 seconds.

port <PORT-NUMBER>

Specifies the authentication port. The TCP port range is 1 to 65535. The default TCP port is port 49.

auth-type{pap | chap}

Selects either the PAP (the default) or CHAP authentication types. If this parameter is not specified, the TACACS+ global default is used.

vrf <VRF-NAME>

Specifies the VRF name to be used for communicating with the server. If no VRF name is provided, the default name of the VRF is default.

Authority

Administrators

Usage

If no local passkey is provided in the command, the server will use the global passkey. This command requires either the global or local passkey to be set; otherwise, the server will not be contacted. To set the global passkey, see tacacs-server key.

If the fully qualified domain name is provided for the TACACS+ server host, a DNS server must be configured and accessible through the same VRF as mentioned for the server host. This configuration is required for the resolution of the TACACS+ server hostname to its IP address. If a DNS server is not available for this VRF, the RADIUS servers reachable through this VRF must be configured by means of their IP addresses only.

Examples

Adding a TACACS+ server with an IPv4 address and a named VRF:

switch(config)# tacacs-server host 1.1.1.1 vrf mgmt

Adding a TACACS+ server with an IPv4 address, a port, and a named VRF:

switch(config)# tacacs-server host 1.1.1.2 port 32 vrf mgmt

Adding a TACACS+ server with an FQDN, a timeout, port number, and a named VRF:

switch(config)# tacacs-server host abc.com timeout 15 port 32 vrf vrf_blue

Adding a TACACS+ server with an IPv6 address:

switch(config)# tacacs-server host 2001:0db8:85a3:0000:0000:8a2e:0370:7334

Adding a TACACS+ server with an IPv4 address, plaintext passkey, timeout, port, authentication type, and VRF name:

switch(config)# tacacs-server host 1.1.1.3 key plaintext test-123 timeout 15 port 32 auth-type chap vrf vrf_red

Deleting a TACACS+ server with an IPv4 address and specified VRF:

switch(config)# no tacacs-server host 1.1.1.1 vrf mgmt

Deleting a TACACS+ server with an FQDN, port, and specified VRF:

switch(config)# no tacacs-server host abc.com port 32 vrf vrf_blue