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Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
OL-27620-01
Chapter 4 Configuring Clocking and Timing
Configuring Clocking and Timing
Configuring a Slave Ordinary Clock
Follow these steps to configure the switch to act as a slave ordinary clock.
Command
Purpose
Step 1
Switch# configure terminal
Enter configuration mode.
Step 2
ptp clock {ordinary | boundary |
e2e-transparent} domain
domain-number [hybrid]
Example:
Switch(config)# ptp clock ordinary
domain 0
Configures the PTP clock. You can create the following
clock types:
•
Ordinary—A 1588 clock with a single PTP port that
can operate in Master or Slave mode.
•
Boundary—Participates in selecting the best master
clock and can act as the master clock if no better clocks
are detected.
Note
Hybrid mode is not supported on the Cisco ME
3600X 24CX switch.
Step 3
priority1 priorityvalue
Example:
Switch(config-ptp-clk)# priority1
128
Sets the preference level for a clock. Slave devices use the
priority1 value when selecting a master clock: a lower
priority1 value indicates a preferred clock. The priority1
value is considered above all other clock attributes.
Valid values are from 0-255. The default value is 128.
Step 4
priority2 priorityvalue
Example:
Switch(config-ptp-clk)# priority2
128
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.
Step 5
clock-port port-name {master | slave}
Example:
Switch(config-ptp-clk)# clock-port
Slave slave
Sets the clock port to PTP master or slave mode; in slave
mode, the port exchanges timing packets with a PTP master
clock.
Step 6
transport ipv4 unicast interface
interface-type interface-number
[negotiation]
Example:
Switch(config-ptp-port)# transport
ipv4 unicast interface loopback 0
negotiation
Sets port transport parameters.
The negotiation keyword configures the router to discover
a PTP master clock from all available PTP clock sources.
Step 7
clock-source source-address
Example:
Switch(config-ptp-port)#
clock-source 8.8.8.1
Specifies the address of a PTP master clock.
