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Probe: Total East/West Traffic

Purpose

The Total East/West Traffic probe calculates total east/west traffic. This probe takes the sum of all traffic to leaf devices from their directly-attached servers and subtracts from that the sum of all traffic to external routers (all traffic values in this calculation are averaged periodically over "Average Period"). The result of this is the total east/west traffic. Time series of length "History Sample Count" is maintained for the sum of server traffic, the sum of external traffic, and the total east/west traffic.

When instantiating this probe, external router tag(s) must be specified (new in version 4.0).
Source Processors
external router south-north link traffic (Interface Counters)

Purpose: wires in interface traffic samples (measured in bytes per second) for traffic sent to external routers

Output Stage: ext_router_interface_traffic
leaf server traffic counters (Interface Counters)

Purpose: wires in interface traffic samples (measured in bytes per second) for traffic received on leaf devices from the servers

Output Stage: server_traffic_counters

Set of traffic samples (for each server-facing interface on each leaf) in the receive direction. Each set member has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).
Additional Processor(s)
external router south-north links traffic average (Periodic Average)

Purpose: Calculate average traffic for each interface-facing external router traffic during period specified by average_period facade parameter. Unit is bytes per second.

Input Stage: ext_router_interface_traffic

Output Stage: ext_router_interface_traffic_avg

Set of traffic average values (for each external router-facing interface on each device). Each set member has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).
server traffic average (Periodic Average)

Purpose: Calculate average server traffic during period specified by average_period facade parameter. Unit is bytes per second.

Input Stage: server_traffic_counters

Output Stage: server_traffic_avg

Set of traffic average values (for each server-facing interface on each leaf) in the receive direction. Each set member has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).
south-north traffic (Sum)

Purpose: Calculate total traffic by summing average traffic on each interface-facing external router. Unit is bytes per second.

Input Stage: ext_router_interface_traffic_avg

Output Stage: total_outgoing_traffic

Total south-north traffic average in bytes per second.
total server traffic (Sum)

Purpose: Calculate total server traffic by summing average traffic on each interface attached to servers in receive direction. Unit is bytes per second.

Input Stage: server_traffic_avg

Output Stage: total_server_traffic

Total server traffic average in bytes per second.
outgoing_traffic_average (Periodic Average)

Purpose: Calculate total south-north traffic over average_period seconds, which is a facade parameter. Unit is bytes per second.

Input Stage: total_outgoing_traffic

Output Stage: total_outgoing_traffic_average

Total south-north traffic average in bytes per second.
server generated traffic average (Periodic Average)

Purpose: Purpose: Calculate total average server traffic over average_period seconds, which is a facade parameter. Unit is bytes per second.

Input Stage: total_server_traffic

Output Stage: total_server_traffic_history

Time series showing total average server traffic over recent history. Unit is bytes per second.
east-west traffic (Subtract)

Purpose: create recent history time series showing how total average east-west traffic changed over time. In terms of the number of samples, the time series holds history_sample_count values (facade parameter). Unit is bytes per second.

Input Stages: total_outgoing_traffic_average and total_server_traffic_history

Output Stage: eastwest_traffic_history

Time series showing how total average east-west traffic changed over recent history. Unit is bytes per second