1-9
Configuring CFD Functions
Configuration Prerequisites
Before configuring CFD functions, you need to complete basic CFD configurations first.
Configuring CC on MEPs
After the CC function is configured, MEPs can send CCMs mutually to check the connectivity between
them.
Follow these steps to configure CC on a MEP:
To do... Use the command... Remarks
Enter system view
system-view
—
Configure the interval field value in
the CCM messages sent by MEPs
cfd cc interval
interval-value
service-instance
instance-id
Optional
By default, the interval field value is
4.
Enter Ethernet interface view
interface
interface-type
interface-number
—
Enable CCM sending on a MEP
cfd cc service-instance
instance-id
mep
mep-id
enable
Required
Disabled by default
The relationship between the interval field value in the CCM messages, the interval between CCM
messages and the timeout time of the remote MEP is illustrated in
Table 1-1.
Table 1-1 Relationship of the interval field value, the interval between CCM messages and the timeout
time of the remote MEP
The interval field value
The interval between CCM
messages
The timeout time of the remote
MEP
3 100 milliseconds 350 milliseconds
4 1 second 3.5 seconds
5 10 second 35 seconds
6 60 seconds 210 seconds
7 600 seconds 2100 seconds
z On different devices, the MEPs belonging to the same MD and MA should be configured with the
same CCM sending interval.
z If the interval field value in the CCM messages sent by MEPs is 3, configuring a large number of
MEPs in the same MD and MA may degrade the device performance.
Configuring LB on MEPs
The LB function can verify the link state between two ends after CC detects a link fault.
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