Pong; Clock Manager; High Availability For Ptp; Virtualization Support - Cisco Nexus 7000 Series Configuration Manual

Pong

• The master receives the delay-request message and notes the time it was received.
• The master sends a delay-response message to the slave. The number of delay request messages should
• The slave uses these timestamps to adjust its clock to the time of its master.
Pong
The network-monitoring tool Pong leverages the PTP's time synchronization infrastructure to diagnose the
health of the network. Pong measures port-to-port delays and is similar to the network-monitoring utility Ping
but provides for a greater depth of network diagnostics. For more information on Pong, see the Cisco Nexus
7000 Series NX-OS Troubleshooting Guide.

Clock Manager

Clocks are resources that need to be shared across different processes and across different VDCs. Multiple
time synchronization protocols (such as NTP and PTP) might be running in the system, and multiple instances
of the same protocol might be running in different VDCs. The clock manager allows you to specify the protocol
and a VDC running that protocol to control the various clocks in the system. For information on configuring
the clock manager, see the Cisco Nexus 7000 Series NX-OS Fundamentals Configuration Guide.

High Availability for PTP

Stateful restarts are supported for PTP. After a reboot or a supervisor switchover, the running configuration
is applied. For more information on high availability, see the Cisco Nexus 7000 Series NX-OS High Availability
and Redundancy Guide.

Virtualization Support

Cisco NX-OS supports multiple instances of PTP, one instance per virtual device context (VDC). By default,
Cisco NX-OS places you in the default VDC unless you specifically configure another VDC. For more
information about VDCs, see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration
Guide.

Licensing Requirements for PTP

PTP requires no license. Any feature not included in a license package is bundled with the Cisco NX-OS
system images and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS
licensing scheme, see the Cisco NX-OS Licensing Guide.

Prerequisites for PTP

PTP has the following prerequisites:
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
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be equal to the number of delay response messages.
Configuring PTP