SNMPD(8)                           Net-SNMP                           SNMPD(8)

       snmpd - daemon to respond to SNMP request packets.


       snmpd  is  an SNMP agent which binds to a port and awaits requests from
       SNMP management software.  Upon receiving a request, it  processes  the
       request(s),  collects  the  requested  information  and/or performs the
       requested operation(s) and returns the information to the sender.

       -a      Log the source addresses of incoming requests.

       -A      Append to the log file rather than truncating it.

       -c FILE Read FILE as a configuration file.

       -C      Do not read any configuration files except the  one  optionally
               specified by the -c option.

       -d      Dump (in hexadecimal) the sent and received SNMP packets.

               Turn  on  debugging output for the given TOKEN(s).  Without any
               tokens specified, it defaults to printing all the tokens (which
               is equivalent to the keyword "ALL").  You might want to try ALL
               for extremely verbose output.  Note: You can not  put  a  space
               between the -D flag and the listed TOKENs.

       -f      Do not fork() from the calling shell.

       -g GID  Change  to  the  numerical group ID GID after opening listening

       -h, --help
               Display a brief usage message and then exit.

       -H      Display a list of configuration file directives  understood  by
               the agent and then exit.

       -I [-]INITLIST
               This  option specifies which modules you do (or do not) want to
               be initialized when the agent starts up.   If  the  comma-sepa-
               rated  INITLIST  is preceded with a '-', it is the list of mod-
               ules that you do not want to be started.   Otherwise,  INITLIST
               is the list of modules to be started.

               To get a list of compiled modules, run the agent with the argu-
               ments -Dmib_init -H (assumes you have  debugging  support  com-
               piled in).

       -l [FILE]
               Log  all output from the agent (including stdout and stderr) to
               FILE.  If no filename is given, log to a default  file  set  at
               compile time (normally /var/log/snmpd.log).

       -L      Do not open a log file; print all messages to stderr instead.

       -P FILE Save the process ID of the daemon in FILE.

       -q      Print simpler output for easier automated parsing.

       -r      Do not require root access to run the daemon.  Specifically, do
               not exit if files only accessible to root  (such  as  /dev/kmem
               etc.) cannot be opened.

       -s      Use syslog for logging.

       -S d|0-7
               Specifies  the  syslog  facility to use when logging to syslog.
               'd' means LOG_DAEMON and 0 through 7  mean  LOG_LOCAL0  through
               LOG_LOCAL7.  LOG_DAEMON is the default.

       -u UID  Change  to  the user ID UID (which can be given in numerical or
               textual form) after opening listening sockets.

       -v, --version
               Print version information for the agent and then exit.

       -V      Symbolically dump SNMP transactions.

       -x ADDRESS
               Listens for AgentX connections on the specified address  rather
               than  the default '/var/agentx/master'.  The address can either
               be a Unix domain socket path,  or  the  address  of  a  network
               interface.   The  format is the same as the format of listening
               addresses described below.

       -X      Run as an AgentX subagent rather than as an SNMP master  agent.

       By  default,  snmpd listens for incoming SNMP requests only on UDP port
       161.  However, it is possible to modify this  behaviour  by  specifying
       one  or  more  listening  addresses as arguments to snmpd.  A listening
       address takes the form:


       At its simplest, a listening address may consist only of a port number,
       in  which  case  snmpd listens on that UDP port on all IPv4 interfaces.
       Otherwise, the <transport-address> part of the specification is  parsed
       according to the following table:

           <transport-specifier>       <transport-address> format

           udp                         hostname[:port] or IPv4-address[:port]

           tcp                         hostname[:port] or IPv4-address[:port]

           unix                        pathname

           ipx                         [network]:node[/port]

           aal5pvc or pvc              [interface.][VPI.]VCI

           udp6 or udpv6 or udpipv6    hostname[:port] or IPv6-address[:port]

           tcp6 or tcpv6 or tcpipv6    hostname[:port] or IPv6-address[:port]

       Note  that  <transport-specifier> strings are case-insensitive so that,
       for example, "tcp" and "TCP" are equivalent.  Here are  some  examples,
       along with their interpretation:           listen  on  UDP port 161, but only on the loop-
                               back  interface.   This  prevents  snmpd  being
                               queried  remotely  (which  is a bit pointless).
                               The ":161" is redundant here since that is  the
                               default SNMP port in any case.

       TCP:1161                listen on TCP port 1161 on all IPv4 interfaces.

       ipx:/40000              listen on IPX port 40000 on all IPX interfaces.

       unix:/tmp/local-agent   listen  on  the  Unix domain socket /tmp/local-

       /tmp/local-agent        identical to the previous specification,  since
                               the  Unix  domain  is the default transport iff
                               the first character of the  <transport-address>
                               is a '/'.

       PVC:161                 listen  on  the  AAL5 permanent virtual circuit
                               with VPI=0 and VCI=161 (decimal) on  the  first
                               ATM adapter in the machine.

       udp6:10161              listen on port 10161 on all IPv6 interfaces.

       Note  that  not  all  the transport domains listed above will always be
       available; for instance, hosts with no IPv6 support will not be able to
       use  udp6 transport addresses, and attempts to do so will result in the
       error "Error opening specified endpoint".   Likewise,  since  AAL5  PVC
       support  is  only  currently  available on Linux, it will fail with the
       same error on other platforms.

       snmpd checks for the existence of and parses the following files:

             Common  configuration  for  the  agent  and   applications.   See
             snmp.conf(5) for details.


             Agent-specific  configuration.   See  snmpd.conf(5)  for details.
             These files are optional and may be used to configure access con-
             trol,  trap generation, subagent protocols and much else besides.

             In addition to these two configuration files in /snmp, the  agent
             will   read   any   files   with   the   names   snmpd.conf   and
             snmpd.local.conf in a colon separated path specified in the SNMP-
             CONFPATH environment variable.

             The agent will also load all files in this directory as MIBs.  It
             will not, however, load any  file  that  begins  with  a  '.'  or
             descend into subdirectories.

       (in recommended reading order)

       snmp.conf(5), snmpd.conf(5)

4th Berkeley Distribution         7 Feb 2002                          SNMPD(8)