This updated standard expands remote monitoring's possibilities

This updated standard expands remote monitoring's possibilities

The Internet Engineering Task Force designed the original remote-monitoring standard to monitor the performance of network segments and collect low-level traffic statistics from Ethernet and token-ring LANs.

Unfortunately, the IETF limited RMON to the media access control layer. RMON can tell a network administrator how much traffic a remote segment is experiencing but not the type of traffic or who's sending it.

RMON-2 extends the original specification, adding 11 function groups to the 10 defined by its predecessor.

RMON-2 probes and monitoring software typically work with function groups at both levels.

In general, RMON-2 allows remote monitoring to recognize higher layers of network activity. The Network Layer Host group counts packets and bytes sent by network address. This lets a probe keep track of what's going on across several network segments.

The Network Layer TopN group uses this information to determine the busiest devices'in RMON terminology, the top talkers.

The Application Layer Host group breaks down bandwidth consumption by protocol, while the Application Layer Matrix sums up, by conversation pair, how many packets of each protocol are being transmitted.

On track

Because RMON-2 can track conversations end to end, by protocol or participant, a probe can often monitor more than a single segment. And end-to-end remote monitoring suddenly becomes a possibility.

'Barry Nance


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