INS_CNGE3FE8MS[POE][HO] Rev. 11.7.17 PAGE 255
INSTRUCTION MANUAL CNGE3FE8MS[POE][HO]
TECH SUPPORT: 1.888.678.9427
possible for the same user to control several concurrent sessions, such as one serial console
session and one ssh session.
The user database is either local or provided by a RADIUS or TACACS+ server. In case of a local
user database, passwords and privilege levels are maintained on the device.
Command Structure and Syntax
A command is a single line of text consisting of keywords and parameters, for example:
my-device# show vlan id 10 ...
my-device# show vlan id 20 ...
The keywords are show, vlan, and id; whereas 10 and 20 are parameters, something that could
contain another value in another command invocation.
Keywords are not case sensitive, thus show, SHOW, and Show are identical. Conversely,
parameters may either be case-sensitive or not, depending on the command and parameter in
question.
Keywords and certain parameters can be abbreviated as long as they are unambiguous. For
example, these commands are identical:
my-device# show interface GigabitEthernet 1/5 capabilities
...
my-device# sh in g 1/5 c
...
This works because:
» There are many keywords that begin with ‘s’ but only one that begins with ‘sh’
» There are several commands that begin with ‘show i’ but only one that begins with ‘show in’
» The show interface command takes a port type as parameter. Depending on the
hardware capabilities, the options are: FastEthernet, GigabitEthernet, 2.5GigabitEthernet,
5GigabitEthernet and 10GigabitEthernet. Thus, ‘g’ is a unique abbreviation for GigabitEthernet
» 1/5 identifies the interface as belonging to switch 1, port 5. This parameter cannot be
abbreviated and has to be written out in full
» The show interface GigabitEthernet 1/5 command can output different kinds of information:
Capabilities, statistics, status, and several other. In this case, ‘c’ is a unique abbreviation for
capabilities
With a bit of practice, this allows for highly efficient keyboard entry, in particular when coupled
with the context-sensitive help features of the ICLI (see Context-Sensitive Help, page 9).
Syntax
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