Cisco Nexus 3548 series - Configuring PTP Grandmaster Clock

The following example shows the domains associated with each PTP enabled interfaces:
switch(config)# show ptp interface domain
PTP port interface domain
--------------------------
Port Domain
------- -----------------
Eth1/1 0
1 1 254
switch(config)#
Configuring PTP Grandmaster Clock
You can configure convergence time to prevent timing loops at the PTP level when grandmaster capability
is disabled on a switch. Grandmaster capability is enabled on the device by default.
.
Procedure
PurposeCommand or Action
Enters global configuration mode.switch# configure terminal
Step 1
Enables or disables PTP on the device.switch(config) # [no] feature ptp
Step 2
Enabling PTP on the switch does not
enable PTP on each interface.
Note
Configures the source IP address for all PTP
packets.
switch(config) # [no] ptp source ip-address
[vrf vrf]
Step 3
The ip-address can be in IPv4 format.
Disables grandmaster capability on the switch.
Prevents the device from acting as a
switch(config) # no ptp grandmaster-capable
[ convergence-time]
Step 4
grandmaster when there is no external
grandmaster available in any domains. The
default convergence time is 30 seconds.
Specify the values for domain and clock class
threshold. Clock class threshold defines the
switch(config) # [no] ptp domain value
clock-class-threshold value
Step 5
threshold value of clock class that the device
uses to determine whether the source clock can
be considered as a grandmaster clock.
The range for the domain value is from 0 to
127.
The range for the clock-class-threshold value
is from 0 to 255.
Cisco Nexus 3548 Switch NX-OS System Management Configuration Guide, Release 7.x
17
Configuring PTP
Configuring PTP Grandmaster Clock