There are several SNMP agent which support SMUX or AgentX. We recommend to use the latest
net-snmp which was formerly known as
It is free and open software and available at http://www.net-snmp.org/
and as binary package for most Linux distributions.
net-snmp has to be compiled with
be able to accept connections from Quagga using AgentX protocol or with
--with-mib-modules=smux to use SMUX protocol.
Nowadays, SMUX is a legacy protocol. The AgentX protocol should be preferred for any new deployment. Both protocols have the same coverage.