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Managing AVMs and VNEs
Cisco Systems, Inc. Page 99
6.8.5 Polling Tab
When customizing polling rates, special consideration should be given to the
following:
• Fast polling rates (30 sec) provide high data accuracy
• Fast change tracking (VC table, profile changes) and accurate flows
vs.
• Constant polling generating high NE CPU utilization, high network
traffic, polling overlaps, and starvation for scheduled polling
• Slow polling rates (30 min) will affect data accuracy
• Slow change tracking, stuck flows, invalid information
vs.
• Low NE and network utilization, complete polling cycles
Warning: Changing polling rates may result in excess traffic and Network
Element crashes.
The Polling tab enables the administrator to:
• Associate a VNE with a previously created polling group.
• Customize polling intervals for a VNE. Different polling intervals can be
defined, namely:
• Status: Typically, would be the most frequently polled information
reflecting the current operational state of the element and its
components.
• Configuration: Reflects more dynamic element configuration such
as forwarding, routing and switching tables.
• System: Reflects element configuration that is less dynamic in
nature.
• Topology: Reflects topology connections at different layers.
In addition, a polling interval can be configured for a class of devices, for
example, for all Cisco routers.