D-Link DS-3550 Command Line Interface Reference Manual - page 189
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config authen server_group
authentication server hosts may be added to any particular group
Parameters
server_group - The user may define the group by protocol groups
built into the switch(tacacs/xtacacs/tacacs+), or by a user-defined
group previously created using the create authen server_group
command.
tacacs – Use this parameter to utilize the built-in tacacs
server protocol on the switch. Only server hosts utilizing the
tacacs protocol may be added to this group.
xtacacs – Use this parameter to utilize the built-in xtacacs
server protocol on the switch. Only server hosts utilizing the
xtacacs protocol may be added to this group.
tacacs+ – Use this parameter to utilize the built-in tacacs+
server protocol on the switch. Only server hosts utilizing the
tacacs+ protocol may be added to this group.
characters to define the previously created server group.
This group may add any combination of server hosts to it,
regardless of protocol.
add/delete – Enter the correct parameter to add or delete a server
host from a server group.
server_host
configured server host the user wishes to add or delete.
protocol – Enter the protocol utilized by the server host. There are
three options:
tacacs – Use this parameter to define the protocol if the
server host is using the tacacs authentication protocol.
xtacacs – Use this parameter to define the protocol if the
server host is using the xtacacs authentication protocol.
tacacs+ – Use this parameter to define the protocol if the
server host is using the tacacs+ authentication protocol.
Restrictions
Only administrator-level users can issue this command.
Example usage:
To add an authentication host to server group “group_1”:
DES-3550:4# config authen server_group group_1
add server_host 10.1.1.121 protocol tacacs+
Command: config authen server_group group_1 add
server_host 10.1.1.121 protocol tacacs+
Success.
DES-3550:4#