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System Management Configuration Guide, Cisco Catalyst IE3x00 Rugged, IE3400 Heavy Duty, and ESS3300 Series Switches

What PTP clock modes and profiles are supported?
How do you configure PTP and NTP-to-PTP conversion?
How do you verify PTP counters, offset, delay, and alarms?

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System Management Configuration Guide, Cisco Catalyst IE3x00 Rugged, IE3400 Heavy Duty, and ESS3300 Series Switches

What PTP clock modes and profiles are supported?
How do you configure PTP and NTP-to-PTP conversion?
How do you verify PTP counters, offset, delay, and alarms?

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About this content

Configuring Precision Time Protocol

Precision time protocol
NTP to PTP time conversion
Requirements for NTP to PTP conversion
PTP configuration and mode limitations
Default settings
PTP switch configuration
Configure NTP to PTP time conversion
PTP serviceability
Related documents
Feature history

Changing VLANs with PTP Transparent Clock

Changing VLANs with PTP transparent clock
Precision time protocol over device level ring
How PTP over DLR works
PTP transparent clock
PTP over DLR topology and use cases
Restrictions for multiple VLAN support and PTP over DLR
Configuring PTP over DLR
Show CLI commands
Feature history for changing VLANs with PTP transparent clock

Manage file systems and the Swap Drive

Overview
ROM monitor variables and configuration handling
SD card operation
Inserting and removing the SD card
Enable an SD card
Disable an SD card
Configure auto sync from internal flash to SD card
Auto restore of switch configurations with SD swap drive
Format the SD card to load Cisco IOx
Emergency recovery for Cisco IOS-XE image

FPGA Profiles

FPGA Profile
Prerequisites
Guidelines and limitations
Default settings
Configure an FPGA profile
Feature history

System Management Configuration Guide, Cisco Catalyst IE3x00 Rugged, IE3400 Heavy Duty, and ESS3300 Series Switches

Requirements for NTP to PTP conversion

Updated: June 26, 2026

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Outlines the prerequisites for using the NTP to PTP conversion feature on the switch.

Before configuring NTP to PTP conversion, ensure that you meet these requirements:

Review the PTP configuration and mode limitations.
Configure an IP address for NTP to function on the switch when using the NTP to PTP conversion feature.
Configure at least one NTP server for the NTP to PTP conversion feature. Configuring three or more NTP servers allows NTP to ignore bad clocks.

Note

For information about configuring NTP, see Basic System Management Configuration Guide, Cisco IOS XE 17, Network Time Protocol.

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