diff --git a/doc/snmp.texi b/doc/snmp.texi
new file mode 100644
index 0000000..315c91c
--- /dev/null
+++ b/doc/snmp.texi
@@ -0,0 +1,68 @@
+@node SNMP Support, Zebra Protocol, Kernel Interface, Top
+@comment  node-name,  next,  previous,  up
+@chapter SNMP Support
+
+SNMP (Simple Network Managing Protocol) is widely implemented feature
+for collecting network information from router and/or host.  Zebra
+itself does not support SNMP agent functionality.  But conjuction with
+SNMP agent, Zebra provides routing protocol MIBs.
+
+Zebra uses SMUX protocol (RFC1227) for making communication with SNMP
+agent.  There are several SNMP agent which support SMUX.  We recommend
+to use the latest @command{ucd-snmp} software.  
+
+@menu
+* How to get ucd-snmp::         
+* SMUX configuration::          
+@end menu
+
+@node How to get ucd-snmp, SMUX configuration, SNMP Support, SNMP Support
+@comment  node-name,  next,  previous,  up
+@section How to get ucd-snmp
+
+ucd-snmp is a free software which distributed so called "as is" software
+license.  Please check the license which comes with distribution of
+@command{ucd-snmp}.  The authors of ucd-snmp are the University of
+California, the University of California at Davis, and the Electrical
+Engineering department at the University of California at Davis.
+
+You can get ucd-snmp from @url{ftp://ucd-snmp.ucdavis.edu/}.  As of this
+writing we are testing with @command{ucd-snmp-4.1.pre1.tar.gz}.
+
+To enable SMUX protocol support, please configure @command{ucd-snmp}
+like below.
+
+@example
+% configure --with-mib-modules=smux
+@end example
+
+After compile and install @command{ucd-snmp}, you will need to configure
+smuxpeer.  I'm now using configuration shown below.  This means SMUX client
+connects to MIB 1.3.6.1.6.3.1 with password test.
+  
+@example
+/usr/local/share/snmp/snmpd.conf
+================================
+smuxpeer 1.3.6.1.6.3.1 test
+@end example
+
+@node SMUX configuration,  , How to get ucd-snmp, SNMP Support
+@comment  node-name,  next,  previous,  up
+@section SMUX configuration
+
+To enable SNMP support of Zebra, you have to configure Zebra with
+@command{--enable-snmp} (@pxref{Configure the Software}).
+
+@deffn {Command} {smux peer @var{oid}} {}
+@deffnx {Command} {no smux peer @var{oid}} {}
+@end deffn
+
+@deffn {Command} {smux peer @var{oid} @var{password}} {}
+@deffnx {Command} {no smux peer @var{oid} @var{password}} {}
+@end deffn
+
+@example
+!
+smux peer .1.3.6.1.6.3.1 test
+!
+@end example