RMON

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RMON
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Basics

• Remote monitoring of networks, not just devices
• Implemented via additional MIBs (SNMP is
  extensible!)
• RMON1 layers 1 2 (like a remote-control
  protocol analyzer)
• RMON2 layers 3 through 7
• SMON special needs of switches

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RMON Advantages

• Locally collected information reduces SNMP
  polling, can collect continuously
• RMON is your fly on the wall even if the
  network is down between you and it

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RMON Servers Probes

• Can be implemented in internetworking devices
  such as switches, routers . . .
• Can be small dedicated hardware devices
• Can be software on a PC
• Maintain their own database

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The RMON MIBs

• 1.3.6.1.2.1.16 RMON
• 1.3.6.1.2.1.16.1-9 RMON1 (RFCs 1271 1757)
• 1.3.6.1.2.1.16.10 Token Ring Extension (RFC
  1513)
• 1.3.6.1.2.1.16.11-20 RMON2 (RFC 2021)

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Configuring RMON Probes

• Control tables
• Define data rows to be collected
• Configure filters, etc.
• Coordinate multiple manager access
• Data tables
• Collect the requested data

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Hey, whats this?
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RMON Switch Issues

• A probe on every port?
• Software-selectable roving probes?
• External probes?
• Track full duplex traffic both ways?

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Application Management

• RMON2 features
• Private MIBs for servers other hosts
• Windows NT example
• SNMP is extensible!

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