Managing Global Settings
Cisco Systems, Inc. Page 115
• System. Sets the polling rate for system-related information, such as
device name, device location and so on.
• Topology Layer 1 Counters. Sets the polling rate of the topology
process as an interval for the Layer 1 counter. This is an ongoing process.
• Topology Layer 2 Counters. Sets the polling rate of the topology
process as an interval for the Layer 2 counter. This process is available on
demand.
Note: All polling rates are expressed in seconds.
In addition to the defined polling intervals, the VNEs implement adaptive
polling ensuring that the element is not overloaded. Checking the device
CPU, may defer specific polls in order to avoid an additional load on the
managed element. For more information about adaptive polling, refer to
page 119.
The user can define polling profiles by setting customized polling intervals,
which can be applied to managed elements. The VNE then polls the network
element according to the preset values. This ensures polling of devices for
different information consistently and in accordance with technical and
business requirements.
Core devices can be assigned to a polling group (namely, all devices use the
same polling profile) that specifies a higher frequency for status but a lower
frequency for configuration-related information while edge or access devices
can be polled more frequently for system and configuration-related
information. Managed Network Service operators for example, can use
polling groups to reflect their agreement with customers so that premium
customer devices are polled more frequently than normal devices.
Sheer DNA includes the pre-configured polling group “default” for the
administrator’s convenience, which cannot be deleted. The default polling
group includes the following settings:
• Status polling rate is 60 seconds.
• Configuration polling rate is 360 seconds.
• System polling rate is 900 seconds.
• Layer 1 polling rate is 9000 seconds.
• Layer 2 polling rate is 9000 seconds.