PurposeCommand or Action
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 grandmaster when there is no external
switch(config) # no ptp
grandmaster-capable [
convergence-time]
Step 4
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 threshold value of clock class that
switch(config) # [no] ptp domain
value clock-class-threshold
value
Step 5
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.
The switch uses this value to determine whether the
source clock is traceable. If the clock class value from
all the peers is higher than the clock class threshold
value, the BMCA may change all the port state to
listening.
Note
Specify the values for domain and clock accuracy thresholdswitch(config) # [no] ptp domain
value clock-accuracy-threshold
value
Step 6
The range for the domain value is from 0 to 127.
The range for the clock-accuracy-threshold value is from 0 to
255.
Enables grandmaster capability on a switch.switch(config) # ptp
grandmaster-capable
Step 7
The following example displays the PTP clock information:
switch(config-if)# show ptp clock
PTP Device Type: Boundary clock
Clock Identity : f4:4e:05:ff:fe:84:7e:7c
Clock Domain: 5
Number of PTP ports: 2
Priority1 : 129
Priority2 : 255
Clock Quality:
Class : 248
Accuracy : 254
Offset (log variance) : 65535
Offset From Master : 0
Mean Path Delay : 391
Steps removed : 1
Local clock time:Wed Nov 9 10:31:21 2016
switch(config-if)#
Cisco Nexus 3548 Switch NX-OS System Management Configuration Guide, Release 6.x
17
Configuring PTP
Configuring PTP Grandmaster Clock
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