Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

Information About TACACS+
Attribute Description
spi Carries the
authentication
information
needed by
the home
agent to
authenticate
a mobile
node during
registration.
The
information
is in the
same syntax
as the ip
mobile
secure host
<addr>
configuration
command.
Basically it
contains the
rest of the
configuration
command
that follows
that string,
verbatim. It
provides the
Security
Parameter
Index (SPI),
key,
authentication
algorithm,
authentication
mode, and
replay
protection
timestamp
range. Used
with the
service=mobileip
and
protocol=ip.

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

814
11.0 11.1
no no
11.2 11.3
no no
12.0 12.1
no yes
12.2
yes