pmdacisco is a Performance Metrics Domain Agent (PMDA) which
extracts performance metrics from one or more Cisco routers.
A brief description of the pmdacisco command line options
-d It is absolutely crucial that the performance metrics domain
number specified here is unique and consistent. That is,
domain should be different for every PMDA on the one host,
and the same domain number should be used for the same PMDA
on all hosts.
-l Location of the log file. By default, a log file named
cisco.log is written in the current directory of pmcd(1)
when pmdacisco is started, i.e. $PCP_LOG_DIR/pmcd. If the
log file cannot be created or is not writable, output is
written to the standard error instead.
-P By default, it is assumed that no user-level password is
required to access the Cisco's telnet port. If user-level
passwords have been enabled on the Ciscos, then those
passwords must be specified to pmdacisco. If specified with
the -P option, password will be used as the default user-
level password for all Ciscos. See also the INTERFACE
IDENTIFICATION section below.
-r pmdacisco will refresh the current values for all
performance metrics by contacting each Cisco router once
every refresh seconds. The default refresh is 120 seconds.
-s The Cisco command prompt ends with the string prompt. The
default value is ``>''. The only way pmdacisco can
synchronize the sending of commands and the parsing of
output is by recognizing prompt as a unique string that
comes at the end of all output, i.e. as the command prompt
when waiting for the next command.
-U By default, it is assumed that no username login is required
to access the Cisco's telnet port. If username login has
been enabled on the Ciscos, then the corresponding usernames
must be specified to pmdacisco. If specified with the -U
option, username will be used as the default username login
for all Ciscos. See also the INTERFACE IDENTIFICATION
-M User account under which to run the agent. The default is
the unprivileged "pcp" account in current versions of PCP,
but in older versions the superuser account ("root") was
used by default.
-x Connect to the Cisco via TCP port number port rather than
the default 23 for a telnet connection.
For each interface, once the telnet connection is established,
pmdacisco is willing to wait up to 5 seconds for the Cisco to
provide a new snapshot of the requested information. If this
does not happen, the telnet connection is broken and no values
are returned. This prevents pmdacisco tying up the Cisco's
telnet ports waiting indefinitely when the response from the
router is not what is expected, e.g. if the format of the ``show
int'' output changes, or the command is in error because an
interface is no longer configured on the router.
As each Cisco router can support multiple network interfaces
and/or multiple communications protocols, it is necessary to tell
pmdacisco which interfaces are to be monitored.
The host:interface-spec arguments on the command line define a
particular interface on a particular Cisco router. host should
be a hostname or a ``dot-notation'' IP address that identifies
the telnet port of a particular Cisco router. There are several
components of the interface-spec as follows.
One of the abbreviations a, B, E, e, f, G, h, s or Vl
respectively for ATM, BRI (ISDN), FastEthernet, Ethernet,
FDDI, GigabitEthernet, HSSI, serial or Vlan.
Depending on the model of the Cisco, this will either be
an integer, e.g. s0, or an integer followed by a slash
(``/'') followed by a subinterface identification in one
of a variety of syntactic forms, e.g. e1/0, G0/0/1 or
To discover the valid interfaces on a particular Cisco,
connect to the telnet port (using telnet(1)) and enter the
command "show int" and look for the interface identifiers
following the keywords ``Ethernet'', ``Fddi'', ``Serial'',
Alternatively run the probe command.
If there is a username login, and it is different to the
default (see -U above), it may be optionally specified
here by appending ``@'' and the username to the end of
If there is a user-level password, and it is different to
the default (see -P above), it may be optionally specified
here by appending a question mark (``?'') and the password
to the end of interface-spec.
prompt If the Cisco command prompt is different to the default
(see -s above), it may be optionally specified here by
appending an exclamation mark (``!'') and the prompt to
the end of interface-spec.
The following are examples of valid interface-spec arguments.
The probe command may be used to discover the names of all
interfaces for a particular Cisco router identified by host. The
-P argument is the same as for pmdacisco.
The parse command takes exactly the same arguments as pmdacisco,
but executes outside the control of any pmcd(1) and so may be
used to diagnose problems with handling a particular Cisco router
and/or one of its interfaces.
Additional diagnostic verbosity may be produced using the -Dappl0,appl1,appl2 command line option. appl0 logs connect and
disconnect events, login progress, high-level flow of control and
extracted statistics. appl1 traces all commands sent to the
Cisco device. appl2 logs tokenizing and parsing of the output
from the Cisco device. Diagnostics are generated on standard
error as each sample is fetched and parsed.
If you want access to the names, help text and values for the
Cisco performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/cisco
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/cisco
pmdacisco is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the
agent is installed or removed.
command line options used to launch pmdacisco$PCP_PMDAS_DIR/cisco/help
default help text file for the Cisco metrics
installation script for the pmdacisco agent
undo installation script for the pmdacisco agent
default log file for error messages and other information
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to email@example.com. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2021-06-20.
(At that time, the date of the most recent commit that was found
in the repository was 2021-06-19.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
Performance Co-Pilot PCP PMDACISCO(1)