http://www.wtcs.org/snmp4tpc/getif.htm
.1.3.6.1.2.1.4.22 - build an arp table report
http://www.dvbmon.com/Products/AdministratorHandbook_LPV7/LoriotProDoc_EN/H8-Main_Process/H8-B2_Discover_Process_EN.htm
> smux               199/tcp     # SNMP Unix Multiplexer
> smux               199/udp     # SNMP Unix Multiplexer
> synoptics-relay    391/tcp     # SynOptics SNMP Relay Port
> synoptics-relay    391/udp     # SynOptics SNMP Relay Port
> agentx             705/tcp     # AgentX
> snmp-tcp-port     1993/tcp     # cisco SNMP TCP port
> snmp-tcp-port     1993/udp     # cisco SNMP TCP port
http://packetstormsecurity.com/files/download/31079/snmpenum.zip


