SmartMIB Small Solution:

Multicast and Broadcast Packet Ratios

(SM-SmallSol005)

Solution Overview:

This small management solution focuses on managing ONLY those interfaces that are NOT in an administrative down state as is set by the network administrator on the managed network devices.

The solution defines a set of modules that reads the MIB interface tables of the managed elements and filters those interfaces that are of type Ethernet and further segments those interfaces into ‘Normal’ speed interfaces (20 Mbps and less) and ‘High’ Speed interfaces (more than 20 Mbps).

Breaking the total packets count value into its relevant components and according to the traffic components nature will give a truly accurate and enhanced picture for the traffic analysis tasks necessarily leading to better understanding of the dynamics of the particular overall ‘network environment’.

Breaking the traffic into its components means that we need to account for all three traffic components; namely: 

·         Unicast traffic.

·         Broadcast traffic. And,

·         Multicast traffic.   

Each of those components could be calculated as a ratio to the total traffic. The total traffic is the sum of the Unicast, Broadcast, and Multicast traffic counts at a particular instant of time.

Following are the equations that should be used to calculate link traffic ratios in each direction:

Inbound Unicast Traffic Ratio

Inbound Broadcast Traffic Ratio

Inbound Multicast Traffic Ratio

Outbound Unicast Traffic Ratio

Outbound Broadcast Traffic Ratio

Outbound Multicast Traffic Ratio

Where;

Total number of Inbound Packets:

Is in fact the sum of all the traffic packets counters represented/reported by the MIB objects: ifInUcastPkts, ifInBroadcastPkts, ifInMulticastPkts.

Total number of Outbound Packets:

Is in fact the sum of all the traffic packets counters represented/reported by the MIB objects: ifOutUcastPkts, ifOutMulticastPkts, ifOutBroadcastPkts

Number of Inbound Unicast Packets:

Is the sum of the traffic packets counter represented/reported by the MIB object: ifInUcastPkts.

Number of Inbound Broadcast Packets:

Is the sum of the traffic packets counter represented/reported by the MIB object: ifInBroadcastPkts.

Number of Inbound Multicast Packets:

Is the sum of the traffic packets counter represented/reported by the MIB object: ifInMulticastPkts.

Number of Outbound Unicast Packets:

Is the sum of the traffic packets counter represented/reported by the MIB object: ifOutUcastPkts.

Number of Outbound Broadcast Packets:

Is the sum of the traffic packets counter represented/reported by the MIB object: ifOutBroadcastPkts.

Number of Outbound Multicast Packets

Is the sum of the traffic packets counter represented/reported by the MIB object: ifOutMulticastPkts.

In looking more closely at link utilization calculated without overhead traffic; unicast, broadcast and multicast traffic ratios could then be compared to the overall utilization in each link direction.

The user has the choice to graph all of the following calculated objects:

• InTrafficUtilization and OutTrafficUtilization: representing the Inbound and Outbound traffic load utilizations respectively.
• In and Out Unicast, Multicast and Broadcast Utilizations: representing the Inbound and Outbound ‘per traffic type’ load utilizations respectively.

No default reports are defined in this solution.

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