Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
IEEE 1588v2 PTP Support
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Table of Contents

IEEE 1588v2 PTP Support

Finding Feature Information

Contents

Restrictions for IEEE 1588v2 PTP

Information About IEEE 1588v2 PTP

PTP Clocks

Components of a PTP-enabled Network

Clock-Synchronization Process

PTP Messages

PTP Clocking Modes

PTP Accuracy

IEEE 1588v2 PTP Support

Configuring IEEE 1588v2 PTP

Configuring Input or Output Network Clocking

Configuring an Ordinary Clock

Configuring an Ordinary Clock as PTP Master

Configuring an Ordinary Clock as PTP Slave

Configuring a Boundary Clock

Configuring Time of Day

Configuring Input Time-of-Day Messages

Configuring Output Time-of-Day Messages

Configuration Examples for IEEE 1588v2 PTP on a Cisco ASR1002-X Router

Verifying the IEEE 1588v2 PTP Configuration

Additional References

Related Documents

MIBs

Technical Assistance

Feature Information for IEEE 1588v2 PTP Support

IEEE 1588v2 PTP Support

IEEE 1588v2 Precision Time Protocol (PTP) is a packet-based two-way message exchange protocol for synchronizing clocks between nodes in a network, thereby enabling an accurate time distribution over a network.This document explains how to configure IEEE 1588v2 PTP on the Cisco ASR 1002-X Routers.

Finding Feature Information

Your software release might not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the “Feature Information for IEEE 1588v2 PTP Support” section.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn . An account on Cisco.com is not required.

Restrictions for IEEE 1588v2 PTP

These are the restrictions for configuring IEEE 1588v2 PTP:

  • Supports IPv4 unicast mode, but not multicast mode.
  • Does not support Dot1q, Q-in-Q, and port-channel interfaces.
  • PTP master supports only a maximum of 32 PTP slaves.
  • PTP boundary clock is supported only in unicast negotiation mode.
  • IPv6 and Multiprotocol Label Switching (MPLS) encapsulation are not supported for PTP packet transfer over Cisco ASR 1002-X Routers.
  • The time-of-day recovered from a 1588v2 session does not synchronize with the system clock.
  • GPS interfaces can be used only for clock recovery. You cannot transmit the system clock on the GPS interface.

Information About IEEE 1588v2 PTP

IEEE 1588v2 PTP is a packet-based two-way message exchange protocol for synchronizing a local clock with a primary reference clock or a grand master clock in hierarchical master-slave architecture. This synchronization is achieved through packets that are transmitted and received in a session between a master clock and a slave clock. IEEE 1588v2 PTP supports system-wide synchronization accuracy in the sub-microsecond range with little use of network and local clock-computing resources.

The following sections describe the terminologies used for better understanding of the IEEE 1588v2 PTP.

PTP Clocks

PTP employs a hierarchy of clock types to ensure that precise timing and synchronization is maintained between the source and the numerous PTP clients that are distributed throughout the network. A logical grouping of PTP clocks that synchronize with each other using the PTP protocol, but are not necessarily synchronized to the PTP clocks in another domain, is called a PTP domain.

The three PTP clock types are Ordinary clock, Boundary clock, and Transparent clock.

  • Ordinary clock--This clock type has a single PTP port in a domain, and maintains the timescale used in the domain. It may serve as a source of time, that is, be a master, or may synchronize to another clock by being a slave. It provides time to an application or to an end device.
  • Boundary clock--This clock type has multiple PTP ports in a domain, and maintains the timescale used in the domain. It may serve as a source of time, that is, be a master, or may synchronize to another clock by being a slave. A boundary clock that is a slave has a single slave port, and transfers timing from that port to the master p orts.
  • Transparent clock--This clock type is a device that measures the time taken for a PTP event message to pass through the device, and provides this information to the clocks receiving this PTP event message.

Table 15-1 shows the 1588v2 PTP support matrix on a Cisco ASR1000 platform.

 

Table 15-1 1588v2 PTP Support Matrix on a Cisco ASR1000 platform

Platform/PTP Clock mode
Ordinary Clock
Boundary Clock
Transparent Clock
Hybrid Clock

ASR1002X

Yes

Yes

No

No

Components of a PTP-enabled Network

The three key components of a PTP-enabled data network are grand master, PTP client, and PTP-enabled router acting as a Boundary clock.

  • Grand Master --An IEEE1588v2 PTP network needs a grand master to provide a precise time source. The most economical way of obtaining the precise time source for the grand master is through a Global Positioning System (GPS) because it provides +/- 100 nanosecond (ns) accuracy. First, the PTP grand master’s built-in GPS receiver converts the GPS timing information to PTP time information, which is typically Coordinated Universal Time (UTC), and then delivers the UTC time to all the PTP clients.
  • PTP client --A PTP client has to be installed on servers, network-monitoring and performance-analysis devices, or other devices that want to use the precise timing information provided by PTP, and it’s mostly an ordinary clock. The two kinds of PTP clients are pure software PTP clients and hardware-assistant PTP clients.
  • PTP boundary clock --Any router that is between a PTP master and PTP slave can act as a PTP boundary clock router. It has two interfaces, one facing the PTP master and another facing the PTP slave. The boundary clock router acts as a slave on the interface facing the PTP master router, and acts as a master on the interface facing the PTP slave router. The PTP boundary clock router is deployed to minimize timing delay in cases where the distance between PTP master router and the PTP slave router is more.

NoteIntermediary nodes between PTP master and slave should be a PTP-enabled or transparent clock node.


Figure 15-1 shows the functions of a PTP Enabled device.

Figure 15-1 Functions of a PTP-Enabled Device

 

Clock-Synchronization Process

Clock synchronization is achieved through a series of messages exchanged between the master clock and the slave clock as shown in Figure 15-2.

Figure 15-2 Clock-Synchronization Process

 

After the master-slave clock hierarchy is established, the clock synchronization process starts. The message exchange occurs in this sequence:

1. The master clock sends a Sync message. The time at which the Sync message leaves the master is time-stamped as t1.

2. The slave clock receives the Sync message and is time-stamped as t2..

3. The slave sends the Delay_Req message, which is time-stamped as t3 when it leaves the slave, and as t4 when the master receives it.

4. The master responds with a Delay_Resp message that contains the time stamp t4.

The clock offset is the difference between the master clock and the slave clock, and is calculated as follows:

Offset = t2 - t1 - meanPathDelay

IEEE1588 assumes that the path delay between the master clock and the slave clock is symmetrical, and hence, the mean path delay is calculated as follows:

meanPathDelay = ((t2 - t1) + (t4 - t3))/2

PTP Messages

All PTP communication is performed through message exchange. The two sets of messages defined by IEEE1588v2 are General messages and Event messages.

  • General messages --These messages do not require accurate time stamps, and are classified as Announce, Follow_Up, Delay_Resp, Pdelay_Resp_Follow_Up, Management, and Signaling.
  • Event messages --These messages require accurate time stamping, and are classified as Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp.

PTP Clocking Modes

The following are the PTP clocking modes supported on a Cisco ASR 1002-X Router:

  • Unicast Mode --In unicast mode, the master sends the Sync or Delay_Resp messages to the slave on the unicast IP address of the slave, and the slave in turn sends the Delay_Req message to the master on the unicast IP address of the master.
  • Unicast Negotiation Mode --In unicast negotiation mode, the master does not know of any slave until the slave sends a negotiation message to the master. The unicast negotiation mode is good for scalability purpose because one master can have multiple slaves.

PTP Accuracy

Accuracy is an important aspect of PTP implementation on an Ethernet port. For a packet network, Packet Delay Variation (PDV) is one of the key factors that impacts the accuracy of a PTP clock. The Cisco ASR 1002-X Router can handle the PDV of the network with its advanced hardware and software capabilities, such as hardware stamping and special high-priority queue for PTP packets. It can provide around 300 ns accuracy in a scalable deployment scenario.

The two methods used on the same topology to cross-check and verify the results are:

  • One-pulse-per-second (1PPS) to verify the PTP slave.
  • Maximum Time Interval Error (MTIE) and Time Deviation (TDEV) to verify the PDV.

The verification topology includes a grand master with a GPS receiver, a Cisco ASR 1002-X Router, PTP hardware slave clocks with 1PPS output, and a test equipment for the measurement.

Figure 15-3 1PPS Accuracy Measurement

 

Figure 15-4 shows the PPS accuracy, with time of day measured using the test equipment as per the topology shown in Figure 15-3. The average PPS accuracy value found is 250 ns.

Figure 15-4 Graph Showing PPS Accuracy

 

Figure 15-5 shows a topology that includes a grand master with a GPS receiver, a Cisco ASR 1002-X Router, PTP hardware slave clocks, and a test equipment for the MTIE and TDEV measurement.

Figure 15-5 MTIE and TDEV measurement

 

Figure 15-6 shows a graph with the MTIE and TDEV measurements to verify the PDV.

Figure 15-6 Graph to show MTIE and TDEV Measurement

 

IEEE 1588v2 PTP Support

IEEE 1588v2 PTP supports these features on a Cisco ASR1002-X Router:

  • Two-step Ordinary clock and Boundary clock.
  • Hardware-assistant PTP implementation to provide sub-300 ns accuracy.
  • PTP operation on all physical onboard Gigabit Ethernet interfaces.
  • Supports built-in Gigabit Ethernet links in two-step clock mode.

Configuring IEEE 1588v2 PTP

You can configure IEEE 1588v2 PTP features on the Cisco ASR 1002-X Router by performing the following procedures:

Configuring Input or Output Network Clocking

We recommend that you configure a stable input clock source from a GPS device before configuring PTP master. The GPS device acts as a PTP grand master, and the BITS or 10-MHz port of a Cisco ASR 1002-X Router can be used to input or output the network clock. Perform these tasks to configure network clocking on a Cisco ASR 1002-X Router:

See the module Synchronous Ethernet Support for more information on network clocking.

Configuring an Ordinary Clock

You can configure a Cisco ASR 1002-X Router in Ordinary clock mode as either master or slave.

Figure 15-7 Ordinary Clock Scenario with a GPS Device as Grand Master

 

Perform these tasks to configure an ordinary clock as either master or slave:

Configuring an Ordinary Clock as PTP Master

This section describes how to configure an ordinary clock as PTP master.

SUMMARY STEPS

1. configure terminal

2. ptp clock ordinary domain domain_number

3. clock-port name master

4. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

5. clock destination ip-address

6. sync interval interval

7. end

DETAILED STEPS

Command
Purpose

Step 1

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 2

ptp clock ordinary domain domain_number

 

Router(config)# ptp clock ordinary domain 0

Creates a PTP clock and specifies the clock mode.

Step 3

clock-port name master

 

Router(config-ptp-clk)# clock-port MASTER master

Specifies the clocking mode of a PTP port and enters the clock port configuration mode.

Step 4

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchange negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 5

clock destination ip-address

 

Router(config-ptp-port)# clock destination 20.20.20.20

Specifies the IP address of a PTP clock destination.

If the clock port is set to master mode with unicast negotiation, you need not use this command because the device uses negotiation to determine the IP address of PTP slave devices.

Step 6

sync interval interval

 

Router(config-ptp-port)# sync interval -4

(Optional) Specifies the interval used to send PTP synchronization messages.

The default value is -5.

Step 7

end

 

 

Router(config-ptp-port)# end

Exits global configuration mode.

Examples

The following example shows how to configure an ordinary clock as PTP master:

Router# configure terminal
Router(config)# ptp clock ordinary domain 0
Router(config-ptp-clk)# clock-port MASTER master
Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation
Router(config-ptp-port)# clock destination 20.20.20.20
Router(config-ptp-port)# Sync interval -4
Router(config-ptp-port)# end

Configuring an Ordinary Clock as PTP Slave

This section describes how to configure Ordinary Clock as PTP slave.

SUMMARY STEPS

1. configure terminal

2. ptp clock ordinary domain domain_number

3. clock-port name slave

4. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

5. clock source ip-address

6. sync interval interval

7. end

DETAILED STEPS

Command
Purpose

Step 1

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 2

ptp clock ordinary domain domain_number

 

Router(config)# ptp clock ordinary domain 0

Creates a PTP clock and specifies the clock mode.

Step 3

clock-port name slave

 

Router(config-ptp-clk)# clock-port SLAVE slave

Specifies the clocking mode of a PTP port and enters the clock port configuration mode.

Step 4

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback22 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchanges negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 5

clock source ip-address

 

Router(config-ptp-port)# clock source 10.10.10.10

Specifies the source IP address of a PTP master clock.

Step 6

end

 

 

Router(config-ptp-port)# end

Exits global configuration mode.

Examples

The following example shows how to configure an ordinary clock as PTP slave:

Router# configure terminal
Router(config)# ptp clock ordinary domain 0
Router(config-ptp-clk)# clock-port SLAVE master
Router(config-ptp-port)# transport ipv4 unicast interface Loopback22 negotiation
Router(config-ptp-port)# clock source 10.10.10.10
Router(config-ptp-port)# end

 

Configuring a Boundary Clock

You can configure the PTP master and PTP slave in a boundary clock topology as shown in Figure 15-8 in the same way that you configure a master and slave in ordinary clock mode. This section describes how to configure a Cisco ASR 1002-X Router in boundary clock mode.


NoteCurrently, boundary clock supports only unicast negotiation mode.


Figure 15-8 PTP Boundary Clock Scenario

 

SUMMARY STEPS

1. configure terminal

2. ptp clock boundary domain domain_number

3. clock-port name slave

4. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

5. clock source ip-address

6. exit

7. clock-port name master

8. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

9. end

DETAILED STEPS

Command
Purpose

Step 1

configure terminal

 

Router# configure terminal

Enters the global configuration mode.

Step 2

ptp clock boundary domain domain_number

 

Router(config)# ptp clock boundary domain 0

Creates a PTP clock and specifies the clock mode.

Step 3

clock-port name slave

 

Router(config-ptp-clk)# clock-port SLAVE slave

Specifies the clocking mode of a PTP port and enters the clock port configuration mode.

Step 4

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchange negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 5

clock source ip-address

 

Router(config-ptp-port)# clock source 10.10.10.10

Specifies the source IP address of a PTP master clock.

Note You can specify only one master clock IP address. Priority-based clock source selection is not supported.

Step 6

exit

 

Router(config-ptp-port)# exit

Exits clock port configuration mode.

Step 7

clock-port name master

 

Router(config-ptp-clk)# clock-port MASTER master

Specifies the clocking mode of a PTP port and enters clock port configuration mode.

Step 8

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback10 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchange negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 9

end

 

 

Router(config-ptp-port)# end

Exits global configuration mode.

Examples

The following example shows how to configure a boundary clock:

Router# configure terminal
Router(config)# ptp clock ordinary domain 0
Router(config-ptp-clk)# clock-port SLAVE slave
Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation
Router(config-ptp-port)# clock source 10.10.10.10
Router(config-ptp-port)# exit
Router(config-ptp-clk)# clock-port MASTER master
Router(config-ptp-port)# transport ipv4 unicast interface Loopback10 negotiation
Router(config-ptp-port)# end

Configuring Time of Day

A Cisco ASR 1002-X Router can exchange time of day and 1PPS input with an external device, such as a GPS receiver, using the time of day and 1PPS input and output interfaces on the router.

Perform these tasks to configure Time of Day (ToD) messages on the Cisco ASR 1002-X Router:

Configuring Input Time-of-Day Messages

This section describes how to configure input time-of-day messages.


NoteYou can configure time-of-day input only in a PTP master clock port.


SUMMARY STEPS

1. configure terminal

2. ptp clock ordinary domain domain_number

3. tod{R0 | R1} {cisco | ntp}

4. input [1pps] {R0|R1}

5. clock-port name master

6. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

7. clock destination ip-address

8. end

DETAILED STEPS

Command
Purpose

Step 1

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 2

ptp clock ordinary domain domain_number

 

Router(config)# ptp clock ordinary domain 0

Creates a PTP clock and specifies the clock mode.

Step 3

tod {R0 | R1} {cisco | ntp}

 

 

Router(config-ptp-clk)# tod R0 ntp

Configures the time-of-day message format used by the 1PPS or BITS interface.

Note Currently, only R0 1PPS port is supported; R1 is not valid. Also, only ntp mode is supported, not cisco mode.

Step 4

input [1pps] { R0 | R1 }

 

Router(config-ptp-clk)# input 1pps R0

Enables PTP input clocking using a 1.544-Mhz, 2.048-Mhz, or 10-Mhz timing interface, or phase using the 1PPS or RS-422 interface.

Note Currently, only R0 1PPS port is supported; R1 is not valid.

Step 5

clock-port name master

 

Router(config-ptp-clk)# clock-port MASTER master

Specifies the clocking mode of a PTP port and enters the clock port configuration mode.

Step 6

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchange negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 7

clock destination ip-address

 

Router(config-ptp-port)# clock destination 20.20.20.20

Specifies the IP address of a PTP clock destination.

If the clock port is set to master mode with unicast negotiation, you need not use this command because the device uses negotiation to determine the IP address of PTP slave devices.

Step 8

end

 

Router(config-ptp-port)# end

Exits global configuration mode.

Examples

The following example shows how to configure input time-of-day messages:

Router# configure terminal
Router(config)# ptp clock ordinary domain 0
Router(config-ptp-clk)# tod R0 ntp
Router(config-ptp-clk)# input 1pps R0
Router(config-ptp-clk)# clock-port MASTER master
Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation
Router(config-ptp-port)# clock destination 20.20.20.20
Router(config-ptp-port)# end

Configuring Output Time-of-Day Messages

This section describes how to configure output time-of-day messages.


NoteYou can configure ToD output only on PTP slave clock ports.


SUMMARY STEPS

1. configure terminal

2. ptp clock ordinary domain domain_number

3. tod{R0 | R1} {cisco | ntp}

4. output [1pps] {R0|R1}

5. clock-port name slave

6. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}

7. clock source ip-address

8. end

DETAILED STEPS

Command
Purpose

Step 1

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 2

ptp clock ordinary domain domain_number

 

Router(config)# ptp clock ordinary domain 0

Creates a PTP clock and specifies the clock mode.

Step 3

tod {R0 | R1} {cisco | ntp}

 

 

Router(config-ptp-clk)# tod R0 ntp

Configures the time-of-day message format used by the 1PPS or BITS interface.

Note Currently, only R0 1PPS port is supported; R1 is not valid. Also, only ntp mode is supported, not cisco mode.

Step 4

output [1pps] { R0 | R1 }

 

Router(config-ptp-clk)# output R0 ntp

Enables output of time-of-day messages using a 1PPS interface.

Note Currently, only R0 1PPS port is supported; R1 is not valid.

Step 5

clock-port name slave

 

Router(config-ptp-clk)# clock-port SLAVE slave

Specifies the clocking mode of a PTP port and enters the clock port configuration mode.

Step 6

transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number [negotiation]

 

Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation

Specifies the IP version, transmission mode, and interface that a PTP clock port uses to exchange timing packets.

The negotiation keyword specifies the unicast negotiation mode where the slave and master clock exchange negotiation messages before establishing a relationship.

Note Only Loopback interface type is supported.

Step 7

clock source ip-address

 

Router(config-ptp-port)# clock source 10.10.10.10

Specifies the source IP address of a PTP master clock.

Note You can specify only 1 master clock IP address. Priority-based clock source selection is not supported.

Step 8

end

 

 

Router(config-ptp-port)# end

Exits global configuration mode.

Examples

The following example shows how to configure output time-of-day messages:

Router# configure terminal
Router(config)# ptp clock ordinary domain 0
Router(config-ptp-clk)# tod R0 ntp
Router(config-ptp-clk)# output 1pps R0
Router(config-ptp-clk)# clock-port MASTER master
Router(config-ptp-port)# transport ipv4 unicast interface Loopback11 negotiation
Router(config-ptp-port)# clock source 10.10.10.10
Router(config-ptp-port)# end

Configuration Examples for IEEE 1588v2 PTP on a Cisco ASR1002-X Router

This example shows how to configure IEEE 1588v2 PTP on a Cisco ASR1002-X Router:

Unicast Negotiation Mode

 
Master Clock
ptp clock ordinary domain 1
tod R0 ntp
input 1pps R0
clock-port MASTER master
transport ipv4 unicast interface loopback 0 negotiation
 
Slave clock
 
ptp clock ordinary domain 1
tod R0 ntp
output 1pps R0
clock-port SLAVE slave
transport ipv4 unicast interface loopback 0 negotiation
clock source 10.1.1.1
 
Boundary clock
 
ptp clock boundary domain 1
clock-port SLAVE slave
transport ipv4 unicast interface loopback 0 negotiation
clock source 10.1.1.1
clock-port MASTER master
transport ipv4 unicast interface loopback 1 negotiation
 

Unicast Mode

 
Master Clock
 
ptp clock ordinary domain 1
tod R0 ntp
input 1pps R0
clock-port MASTER master
transport ipv4 unicast interface loopback 0
clock destination 20.1.1.1
 
Slave clock
 
ptp clock ordinary domain 1
tod R0 ntp
output 1pps R0
clock-port SLAVE slave
transport ipv4 unicast interface loopback 0
clock source 10.1.1.1

Verifying the IEEE 1588v2 PTP Configuration

Use the following commands to verify the IEEE 1588v2 PTP configuration:

  • Use the show ptp clock running domain 0 command to display the output:
Router# show ptp clock running domain 0
 
On the MASTER:
PTP Ordinary Clock [Domain 0]
State Ports Pkts sent Pkts rcvd Redundancy Mode
FREQ_LOCKED 1 31522149 10401171 Hot standby
PORT SUMMARY
PTP Master
Name Tx Mode Role Transport State Sessions Port Addr
MASTER unicast master Lo1 Master 1 -
SESSION INFORMATION
MASTER [Lo1] [Sessions 1]
Peer addr Pkts in Pkts out In Errs Out Errs
11.11.11.11 10401171 31522149 0 0
 
On the SLAVE:
 
PTP Ordinary Clock [Domain 0]
 
State Ports Pkts sent Pkts rcvd Redundancy Mode
 
PHASE_ALIGNED 1 4532802 13357682 Track one
 
PORT SUMMARY
PTP Master
Name Tx Mode Role Transport State Sessions Port Addr
 
SLAVE unicast slave Lo20 Slave 1 10.10.10.10
 
 
SESSION INFORMATION
 
SLAVE [Lo20] [Sessions 1]
 
Peer addr Pkts in Pkts out In Errs Out Errs
 
10.10.10.10 13357682 4532802 0 0
 
  • Use the show platform software ptp tod command to check the time-of-day information:
PTPd ToD information:
 
Time: 06/24/14 02:06:29
 
  • Use the show platform ptp tod all command to check the time-of- day state:
 
Router# show platform ptp tod all
 
On the MASTER
--------------------------------
ToD/1PPS Info for : R0
 
--------------------------------
RJ45 JACK TYPE : RS422
ToD CONFIGURED : YES
ToD FORMAT : NTPv4
ToD DELAY : 0
1PPS MODE : INPUT
1PPS STATE : UP
ToD STATE : UP
--------------------------------
On the SLAVE:
--------------------------------
ToD/1PPS Info for : R0
--------------------------------
RJ45 JACK TYPE : RS422
ToD CONFIGURED : YES
ToD FORMAT : NTPv4
ToD DELAY : 0
1PPS MODE : OUTPUT
OFFSET : 0
PULSE WIDTH : 0
--------------------------------

 

Additional References

Related Documents

Related Topic
Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

MIBs

MIB
MIBs Link

None

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at this URL:

http://www.cisco.com/go/mibs

Technical Assistance

Description
Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for IEEE 1588v2 PTP Support

Table 15-2 lists the features in this module and provides links to specific configuration information.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn . An account on Cisco.com is not required.


NoteTable 15-2 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.


 

Table 15-2 Feature Information for Network Synchronization Support

Feature Name
Releases
Feature Information

IEEE 1588v2 PTP Support

Cisco IOS XE 3.13S

In Cisco IOS XE Release 3.13S, this feature was introduced on the Cisco ASR 1002-X Routers.