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Chapter 4
Configuring Clocking and Timing
Command
Step 5
priority2 priorityvalue
Example:
Switch(config-ptp-clk)# priority2
128
Step 6
clock-port port-name {master | slave}
Example:
Switch(config-ptp-clk)# clock-port
Master master
Router(config-ptp-port)#
Step 7
transport ipv4 unicast interface
interface-type interface-number
[negotiation]
Example:
Switch(config-ptp-port)# transport
ipv4 unicast interface loopback 0
negotiation
Step 8
clock-destination destination-address
Example:
Switch(config-ptp-port)#
clock-destination 8.8.8.1
Step 9
sync interval value
Example:
Switch(config-ptp-port)# sync
interval 1
Step 10
announce timeout value
Example:
Switch(config-ptp-port)# announce
timeout 8
Step 11
exit
Example:
Switch(config)# exit
OL-27620-01
Purpose
Sets a secondary preference level for a clock. Slave devices use the
priority2 value when selecting a master clock: a lower priority2 value
indicates a preferred clock. The priority2 value is considered only when
the router is unable to use priority1 and other clock attributes to select a
clock.
Valid values are from 0-255. The default value is 128.
Sets the clock port to PTP master or slave mode; in master mode, the port
exchanges timing packets with PTP slave devices.
Sets port transport parameters.
The negotiation keyword configures the router to discover a PTP master
clock from all available PTP clock sources.
PTP redundancy is supported only on unicast negotiation mode.
Note
Specifies the IP address of a clock destination when the router is in PTP
master mode.
•
The destination-address parameter is required in master mode.
•
The destination-address parameter is the loopback address of the
slave clock.
Note
The clock-destination command is not applicable in unicast
negotiation mode.
Specifies the sync interval.
Specifies the number of PTP announcement intervals before the session
times out. Valid values are 1-10.
Exits configuration mode.
Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
Configuring Clocking and Timing
4-5
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