frame-period threshold
To configure the thresholds that trigger an Ethernet OAM frame-period error event, use the frame-period
threshold command in Ethernet OAM link monitor or interface Ethernet OAM link monitor configuration
mode. To return the threshold to the default value, use the no form of this command.
frame-period threshold low threshold [high threshold]
no frame-period threshold low threshold [high threshold]
Syntax Description
Low threshold, in frames, that triggers a frame-period error event. The range is
0 to 1000000.
low threshold
(Optional) High threshold, in frames, that triggers a frame-period error event.
The range is 0 to 1000000. The high threshold value can be configured only in
conjunction with the low threshold value.
high threshold
Command Default
The default low threshold is 1.
Command Modes
Ethernet OAM link monitor configuration (config-eoam-lm)
Interface Ethernet OAM link monitor configuration (config-if-eoam-lm)
Command History
ModificationRelease
This command was introduced.Release 3.9.0
Usage Guidelines
The frame period window is defined in the IEEE specification as a number of received frames, in our
implementation it is x milliseconds.
To obtain the number of frames, the configured time interval is converted to a window size in frames using
the interface speed. For example, for a 1Gbps interface, the IEEE defines minimum frame size as 512 bits.
So, we get a maximum of approximately 1.5 million frames per second. If the window size is configured to
be 8 seconds (8000ms) then this would give us a Window of 12 million frames in the specification's definition
of Errored Frame Window.
The thresholds for frame-period are measured in errors per million frames. Hence, if you configure a window
of 8000ms (that is a window of 12 million frames) and a high threshold of 100, then the threshold would be
crossed if there are 1200 errored frames in that period (that is, 100 per million for 12 million).
When the low threshold is passed, a frame-period error event notification is generated and transmitted to the
OAM peer. Additionally, any registered higher level OAM protocols, such as Connectivity Fault Management
(CFM), are also notified. When the high threshold is passed, the configured high threshold action is performed
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
249
Ethernet OAM Commands on the Cisco ASR 9000 Series Router
frame-period threshold
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