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Chapter 4
Configuring Clocking and Timing
Command
Step 8
sync interval value
Example:
Switch(config-ptp-port)# sync
interval 1
Step 9
announce timeout value
Example:
Switch(config-ptp-port)# announce
timeout 8
Step 10
delay-req interval interval
Example:
Switch(config-ptp-port)# delay-req
interval 1
Step 11
Router(config-ptp-port)# end
Configuring a Boundary Clock
Follow these steps to configure the switch to act as a boundary clock.
OL-27620-01
Purpose
Specifies the sync interval.
Specifies the number of PTP announcement intervals
before the session times out. Valid values are 1-10.
Configures the minimum interval allowed between PTP
delay-request messages when the port is in the master state.
The intervals are set using log base 2 values, as follows:
3—1 packet every 8 seconds
•
2—1 packet every 4 seconds
•
•
1—1 packet every 2 seconds
•
0—1 packet every second
•
-1—1 packet every 1/2 second, or 2 packets per second
•
-2—1 packet every 1/4 second, or 4 packets per second
•
-3—1 packet every 1/8 second, or 8 packets per second
•
-4—1 packet every 1/16 seconds, or 16 packets per
second.
•
-5—1 packet every 1/32 seconds, or 32 packets per
second.
•
-6—1 packet every 1/64 seconds, or 64 packets per
second.
•
-7—1 packet every 1/128 seconds, or 128 packets per
second.
Exit configuration mode.
Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
Configuring Clocking and Timing
4-7
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