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Table Of Contents
● G.8275.1 profile
Supported transport methods
OS10 supports the following PTP transport methods:
● Layer2 (Ethernet)
● IPv4 (Unicast and multicast)
● IPv6 (Unicast and multicast)
For the multicast transport method, as defined in the IEEE 1588 standard, PTP uses 224.0.1.129 as the multicast destination
IPv4 address. PTP uses FF0X:0:0:0:0:0:0:181 as the multicast destination IPv6 address.
NOTE: OS10 supports IPv6 multicast only between two directly-connected IPv6 PTP nodes.
Configurable PTP attributes
The following are configurable PTP attributes that BMCA uses to determine the master and slave clock devices:
● Priority1—Has the highest preference in the list of attributes used for master clock device selection.
● Priority2—Has the fifth preference in the list of attributes used for master clock device selection.
● LocalPriority—(Applicable only for the G.8275.1 profile) Determines the master clock device when two clocks are similar to
each other.
Supported platforms
OS10 supports PTP only on the following platforms:
● S4100-ON series: S4148F-ON, S4148T-ON, S4148FE-ON, S4148U-ON
● S5200-ON series: S5232F-ON, S5248F-ON, S5296F-ON, S5224F–ON
● Z9264F-ON
PTP installation scale and limits
The following table lists the verified scalability limits for PTP nodes with message rate (sync and delay request) of 16 pps.
Table 8. PTP scale and limits
Platform PTP peer slave sessions PTP peer master sessions Total number of sessions
S4100-ON series 36 4 40
● S5200F-ON series
● Z9264F-ON
120 8 128
Configuration notes
● The maximum number of supported PTP ports is 40.
● Maximum number of supported PTP unicast masters is eight.
● In a topology where a PTP device is connected to VLT primary and secondary nodes, configure PTP as an independent
boundary clock on both the VLT nodes.
NOTE:
○ Dell EMC recommends enabling PTP on the VLT port-channel member interfaces and not on the VLT port-channel
interface.
○ Tagged PTP messages using the ptp vlan command are not supported on VLT port-channel member interfaces.
○ The unicast transport method is not supported on the VLT port-channel member interfaces.
System management 169