ESR series service routers.ESR-Series. User manual
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Step Description Command Keys
9 Specify the interface or tunnel of 
the router whose IPv4/IPv6 
address will be used as the 
source IPv4/IPv6 address in 
outgoing TACACS packets.
esr(config-tacacs-server)# 
source-interface { <IF> | <TUN> }
<IF> – interface specified in form 
given in theTypes and naming 
procedure of router interfaces 
section of CLI command reference 
guide.
<TUN> – tunnel name specified in 
form given in the Types and naming 
procedure of router tunnels section.
10 Set TACACS as authentication 
method of user privileges 
elevation.
esr(config)# aaa authentication 
enable <NAME><METHOD 1> 
[ <METHOD 2> ] [ <METHOD 3> ] 
[ <METHOD 4> ]
<NAME> – list name, set by the 
string of up to 31 characters;
default – default list name.
<METHOD> – authentication 
methods:
enable – authentication by 
enable passwords;
tacacs – authentication by 
TACACS;
radius – authentication by 
RADIUS;
ldap – authentication by 
LDAP.
11 Set the method for iterating over 
authentication methods 
(optional).
esr(config)# aaa authentication 
mode <MODE>
<MODE> – options of iterating over 
methods:
chain – if the server returned 
FAIL, proceed to the following 
authentication method in the 
chain;
break – if the server returned 
FAIL, abandon authentication 
attempts. If the server is 
unavailable, continue 
authentication attempts by 
the following methods in the 
chain.
Default value: chain.
12 Configure the list of CLI 
commands accounting methods 
(optional).
esr(config)# aaa accounting 
commands stop-only tacacs
13 Configure tacacs in the list of 
user session accounting 
methods (optional).
esr(config)# aaa accounting login 
start-stop <METHOD 1> 
[ <METHOD 2> ]
<METHOD> – accounting methods:
tacacs – session accounting 
by TACACS;
radius – session accounting 
by RADIUS.