New and Changed Information

The following table provides an overview of the changes to the organization and content of this guide up to the current release.

Table 1. New and Changed Information
Release	Feature or Change Description	Where Documented
9.3(5)	First release of this document

Hybrid PTP Platform Overview

Beginning with Cisco NX-OS Release 9.3(5), a hybrid SyncE-PTP topology is supported to achieve the end-to-end network precision frequency required for circuit emulation and cell tower frequency referring.

The following figure shows the topology with the external timing source as the grandmaster clock (T-GM). The T-GM provides the timing source for the Telecom Boundary Clocks (T-BCs).

Figure 1. Hybrid PTP with External Primary Reference Clock Source

Telecom Grandmaster (T-GM): Provides timing for other network devices and does not synchronize its local clock to other network devices.

Telecom Boundary Clock (T-BC): Synchronizes its local clock to a T-GM or an upstream T-BC clock and provides timing information to downstream T-BC or T-TSC clocks.

Guidelines and Limitations

PTP Telecom Profile Guidelines and Limitations

PTP Telecom Profile has the following guidelines and limitations:

PTP Telecom Profile is supported only on the Cisco Nexus N9K-C93180YC-FX3S switch.
1 Pulse per Second (1PPS) output is enabled by default. UTC/SMB port is in output mode and hence 1PPS output is enabled.
Only PTP class B is supported
Only Telecom Boundary Clock (T-BC) is supported
Cisco's Telecom Profile G.8273.2 feature is compliant with the ITU-T G.8273.2 : Timing characteristics of telecom boundary clocks and telecom time slave clocks standard with the exception that 1PPS output is not aligned with PTP.
TOD output is not supported

Note

Time of Day and PTP GM are not supported in Cisco NX-OS Release 9.3(5).

Frequency Synchronization Guidelines and Limitations

Frequency Synchronization has the following guidelines and limitations:

SyncE is supported only on the Cisco Nexus N9K-C93180YC-FX3S switch.
SyncE is supported only on physical interfaces.
A maximum four ethernet interfaces can be monitored for SyncE selection input at any given instance of time.
Each quad port group on the PHY provides one reference clock.
Only one Ethernet interface from each quad port group can be configured as a SyncE input (one reference clock for each port group). There is no restriction on SyncE outputs.
SyncE must be enabled explicitly on the member interfaces for a port-channel. If a member interface of a port-channel is locked as a SyncE source, the ability to send out DNU on other member interfaces enabled for SyncE is controlled via the global command fsync transmit dnu lag-members .
Only G.8275.1 hybrid profile in BC mode is supported.
For a list of qualified optics for this release, see the Cisco Optics Compatibility Matrix.

Note

GPS and GNSS are not supported in Cisco NX-OS Release 9.3(5).

Configuring PTP Globally

This procedure describes the steps involved to configure PTP telecom profile including the clock and its settings to be consistent with ITU-T Telecom Profiles for Frequency.

Before you begin

The QoS TCAM region Ingress SUP [ingress-sup] must be set to 768 or higher. Follow these steps:

Check the TCAM region by using the show hardware access-list tcam region command.
If the Ingress SUP region is not set to 768 or higher, then configure the Ingress SUP TCAM region using the command hardware access-list tcam region ing-sup 768 . Copy the running configuration to the startup configuration (copy running-config startup-config ) and reload the switch.

SUMMARY STEPS

configure terminal
feature ptp
ptp profile { 8275-1 | default }
Profile Default: mode { hybrid | non-hybrid | none }
exit
ptp source ip-address
Profile Default: ptp priority1 value
Profile Default: ptp priority2 value
ptp pdelay-req-interval value
Profile Default: ptp domain value

DETAILED STEPS

Command or Action Purpose

Step 1

configure terminal

Example:

switch# configure terminal
switch(config)#

Enters global configuration mode.

Step 2

feature ptp

Example:

switch(config)# feature ptp
switch(config)#

Enables the global PTP feature.

Step 3

ptp profile { 8275-1 | default }

Example:

switch(config)# ptp profile 8275-1
switch(config-ptp-profile)#

Enables a PTP profile and enters the PTP profile configuration mode. For more information about the commands supported through the profile types in this command, see

Note

8275.1 supports the PTP Telecom Profile configuration.

For Cisco NX-OS Release 9.3(5), only the Cisco Nexus N9K-C93180YC-FX3S supports either option in this command.

Step 4

Profile Default: mode { hybrid | non-hybrid | none }

Example:

switch(config)# mode hybrid
switch(config-ptp-profile)#

Configures the PTP operational mode for the switch:

hybrid : The SyncE source acts as the PTP source.

default : The local/1588 clock acts as the PTP source.

Note

This command is automatically configured when the ptp profile command is set. The configuration value cannot be changed. See Step 3 for more information.

Step 5

exit

Example:

switch(config-ptp-profile)# exit
switch(config)#

Exits the PTP profile configuration mode and returns to the global configuration mode.

Step 6

ptp source ip-address

Example:

switch(config)# ptp source 0.0.0.0
switch(config)#

Configures the source IPv4 address for all the PTP packets in the multicast PTP mode.

Step 7

Profile Default: ptp priority1 value

Example:

switch(config)# ptp priority1 128
switch(config)#

Configures the priority1 value to use when advertising this clock. This value overrides the default criteria (clock quality, clock class, etc.) for best master clock selection. Lower values take precedence.

Note

This command is automatically configured when the ptp profile command is set. The configuration value cannot be changed. See Step 3 for more information.

Step 8

Profile Default: ptp priority2 value

Example:

switch(config)# ptp priority2 128
switch(config)#

Configures the priority2 value to use when advertising this clock. This value overrides the default criteria (clock quality, clock class, etc.) for best master clock selection. Lower values take precedence.

Note

This command is automatically configured when the ptp profile command is set. The configuration value cannot be changed. See Step 3 for more information.

Step 9

ptp pdelay-req-interval value

Example:

switch(config)# ptp pdelay-req-interval 0
switch(config)#

Configures the peer delay request interval.

value : Range is from 0 through 5.

Step 10

Profile Default: ptp domain value

Example:

switch(config)# ptp domain 24
switch(config)#

Specifies the PTP clock domain value.

Note

This command is automatically configured when the ptp profile command is set. The configuration value cannot be changed. See Step 3 for more information.

Configuring PTP on an Interface

This procedure describes the steps that are involved to configure PTP telecom profile for interfaces.

Note

Some commands that are described in this procedure are automatically enabled and configured when the ptp profile 8275-1 global command is set. See Configuring PTP Globally for more information.

Before you begin

This procedure along with configuring frequency synchronization on the interface, constitutes the required interface settings for the "hybrid PTP" platform. For more information regarding the interface frequency synchronization configuration, see .

SUMMARY STEPS

configure terminal
interface ethernet slot / port
[ no ] ptp
Profile Default: ptp transport ethernet
Profile Default: ptp transmission multicast
Profile Default: ptp role dynamic
(Optional) ptp destination-mac non-forwardable rx-no-match accept
Profile Default: ptp cost value
Profile Default: ptp delay-request minimum interval log-seconds
Profile Default: ptp announce interval log-seconds
Profile Default: ptp sync interval log-seconds
(Optional) [no] ptp announce timeout count
(Optional) [ no ] ptp profile-override

DETAILED STEPS

Command or Action Purpose

Step 1

configure terminal

Example:

switch# configure terminal
switch(config)#

Enters global configuration mode.

Step 2

interface ethernet slot / port

Example:

switch(config)# interface ethernet 1/5
switch(config-if)#

Specifies the interface on which you are configuring PTP telecom profile parameters and enters the interface configuration mode.

Step 3

[ no ] ptp

Example:

switch(config-if)# ptp
switch(config-if)#

Enables PTP on the interface.

Step 4

Profile Default: ptp transport ethernet

Example:

switch(config-if)# ptp transport ethernet
switch(config-if)#

Specifies the transport mechanism that is used to send PTP packets. For etnernet , PTP packets are carried only in Eth frame (Eth/ptp).

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 5

Profile Default: ptp transmission multicast

Example:

switch(config-if)# ptp transmission multicast
switch(config-if)#

Configures the PTP transmission method that is used by the interface. For multicast , PTP uses multicast destination IP address 224.0.1.129 as per IEEE 1588 standards for communication between devices.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 6

Profile Default: ptp role dynamic

Example:

switch(config-if)# ptp role dynamic
switch(config-if)#

Configures the PTP role of the interface. For dynamic , the best master clock algorithm (BMCA) assigns the role.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 7

(Optional) ptp destination-mac non-forwardable rx-no-match accept

Example:

switch(config-if)# ptp destination-mac non-forwardable rx-no-match accept
switch(config-if)#

(Optional)

Accepts and responds to non-forwardable destination MAC address packets. These destination MAC addresses are used in the PTP messages that are exchanged between the GM clock, PTP-master clock, and PTP-slave clocks.

Step 8

Profile Default: ptp cost value

Example:

switch(config-if)# ptp cost 128
switch(config-if)#

Configures the value to be used in the BMCA's selection of the best master clock. If all the parameters mentioned in the standard are the same, then this local priority is used.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 9

Profile Default: ptp delay-request minimum interval log-seconds

Example:

switch(config-if)# ptp delay-request minimum interval -4
switch(config-if)#

Configures the minimum interval that is allowed between PTP delay messages when the port is in the master state.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 10

Profile Default: ptp announce interval log-seconds

Example:

switch(config-if)# ptp announce interval 3
switch(config-if)#

Configures the interval between PTP announce messages on an interface or the number of PTP intervals before a timeout occurs on an interface.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 11

Profile Default: ptp sync interval log-seconds

Example:

switch(config-if)# ptp sync interval 1
switch(config-if)#

Configures the interval between PTP synchronization messages on an interface.

Note

This command is automatically configured when the ptp profile 8275-1 global command is set. For more information about the ptp profile 8275-1 command, see Configuring PTP Globally.

Step 12

(Optional) [no] ptp announce timeout count

Example:

switch(config-if)# ptp announce timeout 3
switch(config-if)

(Optional)

Configures the number of PTP intervals before a timeout occurs on an interface.

The range for the interval timeout is from 2 to 4 intervals.

Step 13

(Optional) [ no ] ptp profile-override

Example:

switch(config-if)# ptp profile-override
switch(config-if)#

(Optional)

Disabled by default, when enabled, allows you to change the following commands in this interface configuration:

ptp transport
ptp announce interval
ptp delay-request minimum interval
ptp sync interval
ptp cost (8275.1 profile only)

Note

When enabled, changes to the commands will not be reset to default if the global PTP profile is changed. Removing ptp profile-override resets the PTP configuration on the interface to the default values corresponding to the global profile.

PTP Profile Defaults

The following table lists the ranges and default values for the commands that are automatically configured when the global command ptp profile is set. You cannot change the range for the affected global commands beyond those allowed by the configured profile. However, in the interface mode, they can be changed if the ptp profile-override command is set.

Note

For Cisco NX-OS Release 9.3(5), only the Cisco Nexus N9K-C93180YC-FX3S supports either option in this command.

Table 2. Range and Default Values
Parameter	Scope or Configuration Mode	Default Profile's Supported Range of Values	Default Profile's Default Value	8275.1 Profile's Supported Range of Values	8275.1 Profile's Default Value	With 'ptp profile-override' Configured on an Interface Supported Range of Values (Default is Based on Configured Profile)
mode	global	none	none	hybrid	hybrid	no change
domain	global	0 to 63	0	24 to 43	24	no change
priority1	global	0 to 255	255	128	128	no change
priority2	global	0 to 255	255	0 to 255	128	no change
cost	interface	Not configurable	Not configurable	0 to 255	128	0 to 255
transport	interface	ipv4	ipv4	ethernet	ethernet	ethernet, ipv4
transmission	interface	multicast, unicast	multicast	multicast	multicast	no change
role	interface	dynamic, master, slave	dynamic	dynamic	dynamic	no change
announce interval	interface	0 to 4 0 to 4 with aes67 -3 to 1 with smpte-2059-2	1	-3	-3	-3 to 4 0 to 4 with aes67 -3 to 1 with smpte-2059-2
delay-request minimum interval	interface	-1 to 6 -4 to 5 with aes67 -4 to 5 with smpte-2059-2	0	-4	-4	-4 to 6 -4 to 5 with aes67 -4 to 5 with smpte-2059-2
sync interval	interface	-3 to 1 -4 to 1 with aes67 -7 to 0 with smpte-2059-2	-2	-4	-4	-4 to 1 -4 to 1 with aes67 -7 to 0 with smpte-2059-2

Licensing Requirements for Synchronous Ethernet (SyncE)


Product	License Requirement
Cisco NX-OS	Install the SyncE add-on license. For a complete explanation of the Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide.

Enabling Frequency Synchronization

Use this procedure to enable frequency synchronization, set the quality level of the switch, identify the clock ID for ESMC extended TLV, and configure the ESMC peer timeout for software upgrades.

SUMMARY STEPS

configure terminal
[ no ] feature frequency-synchronization
[ no ] fsync quality itu-t option{ 1 | 2 generation { 1 | 2 }
fsync clock-identity mac-address | no fsync clock-identity
[ no ] fsync esmc peer receive timeout{ 0 | value}
[ no ] fsync transmit dnu lag-members
(Optional) copy running-config startup-config

DETAILED STEPS

Command or Action Purpose

Step 1

configure terminal

Example:

switch# configure terminal
switch(config)#

Enters global configuration mode.

Step 2

[ no ] feature frequency-synchronization

Example:

switch(config)# feature frequncy-synchronization
switch(config)#

Enables frequency synchronization on the switch.

Step 3

[ no ] fsync quality itu-t option{ 1 | 2 generation { 1 | 2 }

Example:

switch(config)# fsync quality itu-t option 1
switch(config)#

Specifies the quality level for the switch. The default is option 1 .

option 1 - Includes DNU, EEC1, PRC, PRTC, SEC, SSU-A, SSU-B, eEEC and ePRTC.
option 2 generation 1 - Includes DUS, EEC2, PRS, PRTC, RES, SMC, ST2, ST3, ST4, STU, eEEC and ePRTC.
option 2 generation 2 - Includes DUS, EEC2, PROV, PRS, PRTC, SMC, ST2, ST3, ST3E, ST4, STU, TNC, eEEC and ePRTC.

Note

The quality option that is configured here must match the quality option that is specified in the quality receive and quality transmit commands in the interface frequency synchronization configuration mode.

Step 4

fsync clock-identity mac-address | no fsync clock-identity

Example:

switch(config)# fsync clock-identity AB:CD:EF:12:34:56
switch(config)#

Specifies the clock ID to be used for Ethernet Synchronization Message Channel (ESMC) extended TLV. If no clock ID is configured, the system uses the default VDC MAC address.

Step 5

[ no ] fsync esmc peer receive timeout{ 0 | value}

Example:

switch(config)# fsync esmc peer receive timeout 120
switch(config)#

Specifies the ESMC peer receive timeout during ISSU.

0 disables the ESMC peer receive timeout.

value is the ESMC receive timeout in seconds. Enter a value from 120 through 600. Default = 120.

This command ensures that the ESMC control plane, and thus, selection, is not removed during software upgrade for a period of the value .

Step 6

[ no ] fsync transmit dnu lag-members

Example:

switch(config)# fsync transmit dnu lag-members
switch(config)#

SyncE must be enabled explicitly on the member interfaces for a port-channel. If a member interface of a port-channel is locked as a SyncE source, the ability to send out DNU (Do Not Use) QLs on other member interfaces that are enabled for SyncE is controlled by this command.

If enabled and an interface that is driving the clock for the switch is part of a port-channel, then any members of the port-channel will also send out DNU QL if SyncE is enabled on that interface.

If disabled, the system drives the QL of the selected source on all interfaces regardless of whether they are in the same port-channel as the interface driving the clock.

Step 7

(Optional) copy running-config startup-config

Example:

switch(config)# copy running-config startup-config
switch(config)#

(Optional)

Copies the running configuration to the startup configuration.

Configuring Frequency Synchronization on an Interface

Use this procedure to configure frequency synchronization on a specific interface.

Before you begin

This procedure along with configuring PTP telecom profile on the same interface, constitutes the required interface settings for the "hybrid PTP" platform. For more information about the interface PTP telecom profile configuration, see Configuring PTP on an Interface.

Make sure that you have globally enabled frequency synchronization on the device (global configuration command feature frequency-synchronization ).

SUMMARY STEPS

configure terminal
[ no ] interface ethernet slot / port
[ no ] frequency synchronization
[no] selection input
[no] ssm disable
[ no ] quality { receive | transmit } { exact | highest | lowest } itu-t option ql-option ql
[no] priority value
[no] wait-to-restore minutes

DETAILED STEPS

Command or Action Purpose

Step 1

configure terminal

Example:

switch# configure terminal
switch(config)#

Enters global configuration mode.

Step 2

[ no ] interface ethernet slot / port

Example:

switch(config)# interface ethernet 1/5
switch(config-if)#

Specifies the interface on which you are enabling frequency synchronization and enters the interface configuration mode.

Step 3

[ no ] frequency synchronization

Example:

switch(config-if)# frequency synchronization
switch(config-if-freqsync)#

Enables frequency synchronization on the interface and enters the interface frequency synchronization configuration mode. The system selects the frequency signal to be used for clocking transmission, but does not enable the use of the interface as an input.

Note

The no form of the command functions only if there is no configuration present under the frequency synchronization configuration mode.

Step 4

[no] selection input

Example:

switch(config-if-freqsync)# selection input
switch(config-if-freqsync)#

Specifies the interface as a timing source to be passed to the selection algorithm.

Step 5

[no] ssm disable

Example:

switch(config-if-freqsync)# ssm disable
switch(config-if-freqsync)#

Disables sending ESMC packets and ignores any received ESMC packets.

Step 6

[ no ] quality { receive | transmit } { exact | highest | lowest } itu-t option ql-option ql

Example:

switch(config-if-freqsync)# quality receive exact itu-t option 1 PRC
switch(config-if-freqsync)#

Adjusts the Quality Level (QL) value that is used in received or transmitted SSMs, before it is used in the selection algorithm. Each timing source has a QL associated with it which provides the accuracy of the clock. This QL information is transmitted across the network via SSMs over the Ethernet Synchronization Messaging Channel (ESMC) so that devices can know the best available source to use for synchronization.

exact ql : Specifies the exact QL regardless of the value that is received, unless the received value is DNU.
highest ql : Specifies an upper limit on the received QL. If the received value is higher than this specified QL, this QL is used instead.
lowest ql : Specifies a lower limit on the received QL. If the received value is lower than this specified QL, DNU is used instead.

Note

The quality option that is specified in this command must match the globally configured quality option in the quality itu-t option command.

Step 7

[no] priority value

Example:

switch(config-if-freqsync)# priority 100
switch(config-if-freqsync)#

Configures the priority of the frequency source on the interface. This priority is used in the clock-selection algorithm to choose between two sources that have the same QL. Values range from 1 (highest priority) to 254 (lowest priority). The default value is 100.

Note

This command is valid only if selection input is configured.

Step 8

[no] wait-to-restore minutes

Example:

switch(config-if-freqsync)# wait-to-restore 0
switch(config-if-freqsync)#

Configures the wait-to-restore time, in minutes, for frequency synchronization on the interface. minutes is the amount of time after the interface initializes before it is used for synchronization. Values range from 0 to 12. The default value is 5.

Note

This command is valid only if selection input is configured.

Verifying the Configuration

This section contains example outputs from show commands used to verify the Frequency Synchronization and PTP Telecom Profile configuratrions.

Verifying the Frequency Synchronization Configuration

After performing the frequency synchronization configuration tasks, use this reference to check for configuration errors and verify the configuration.

show frequency synchronization configuration errors

The output of this command displays errors in the frequency synchronization configuration.

The following example shows the mismatch between the global quality itu-t option and the interface quality receive itu-t option :

switch# show frequency synchronization configuration errors

Elysian2(config)# show frequency synchronization configuration errors
Ethernet1/9
    quality receive exact itu-t option 1 PRC
* The QL that is configured is from a different QL option set than is
configured globally.


!Command: show running-config fsync_mgr all
!Running configuration last done at: Mon Feb 10 06:06:15 2020
!Time: Mon Feb 10 06:09:18 2020

version 9.3(5) Bios:version 00.04
feature frequency-synchronization

fsync quality itu-t option 2 generation 1 << must be the same as interface
fsync clock-identity 0
fsync esmc peer receive timeout 120

interface Ethernet1/9
  frequency synchronization
    selection input
    ssm disable
    quality receive exact itu-t option 1 PRC << must be the same as global
    priority 100
    wait-to-restore 0

interface Ethernet1/13
  frequency synchronization
    selection input
    ssm disable
    quality receive exact itu-t option 1 PRC
    priority 110
    wait-to-restore 0

show running-config fsync_mgr all

The output of this command displays the current frequency synchronization configuration on the device.

The following is an example of the output of the show running-config fsync_mgr all command:

switch# show running-config fsync_mgr all

feature frequency-synchronization

fsync quality itu-t option 1
fsync clock-identity 0
fsync esmc peer receive timeout 120

interface Ethernet1/9
  frequency synchronization
    selection input
    ssm disable
    quality receive exact itu-t option 1 PRC
   priority 100
    wait-to-restore 0

interface Ethernet1/13
  frequency synchronization
    selection input
    priority 100
    wait-to-restore 0

show frequency synchronization interface brief

The output of this command displays all interfaces that have frequency synchronization configured. Sources that have been nominated as inputs have ‘S’ in the Flags (Fl) column. Sources that have not been nominated as inputs do not have ‘S’ displayed.

The following is an example of the output of the show frequency synchronization interface brief command:

switch# show frequency synchronization interface brief

Flags:  > - Up                D - Down              S - Assigned for selection
        d - SSM Disabled      x - Peer timed out    i - Init state
        e - SSM Enabled       s - Output squelched
Fl    Interface          QLrcv QLuse Pri QLsnd Output driven by
===== ================== ===== ===== === ===== ========================
>S    Eth1/9             PRC   PRC   100 PRC   Eth1/13
>Sds  Eth1/13            n/a   PRC   100 n/a   Eth1/13

show frequency synchronization interface ethernet

The output of this command displays individual (user-selected) interfaces with associated frequency synchronization information.

The following is an example of the output of the show frequency synchronization interface ethernet slot / port command:

switch# show frequency synchronization interface ethernet 1/9

Inteface State:UP
Assigned as input for Selection
  Wait-to-restore time 0 minute(s)
  SSM Enabled
    Peer Up for 00:07:01, last SSM received 0.307s ago
    Peer has come up 4 times and timed out 1 times
    ESMC SSMs        Total  Information     Event    DNU/DUS
      Sent:           1097         1088         9         83
      Received:        823          816         7        155
  Input:
    Up
    Last received QL: PRC
    Effective QL: PRC, Priority: 100
    Originator clock ID: fffffffffebfa543
    SyncE steps: 1, eSyncE steps: 1
    Not all steps run eSyncE; Chain of extended ESMC data is broken
    Supports frequency
  Output:
    Selected source: Eth1/13
    Selected source QL: PRC
    Effective QL: PRC
    Originator clock ID: fffffffffebfa863
    SyncE steps: 1, eSyncE steps: 1
    Not all steps run eSyncE; Chain of extended ESMC data is broken
  Next selection points:

show frequency synchronization selection (with PTP Profile 8275-1)

The output of this command displays the detailed view of the different selection points within the system.

Note

This example shows the output when PTP profile 8275-1 is configured.

The following is an example of the output of the show frequency synchronization selection slot / port command:

switch# show frequency synchronization selection
==============
Selection point: System Clock (T0) Selector (3 inputs, 1 selected)
  Last programmed 18.898s ago, and selection made 8.621s ago
  Next selection points
    Node scoped   :
  Uses frequency selection
  Used for local line interface output
  S  Input                     Last Selection Point         QL  Pri  Status
  == ========================  ========================  =====  ===  ===========
  11 Ethernet1/9               n/a                         PRC   99  Locked     
     Ethernet1/13              n/a                         PRC  100  Available  
     Internal0[1]              n/a                         SEC  255  Available  
==============
Selection point: IEEE 1588 Clock Selector (3 inputs, 1 selected)
  Last programmed 18.898s ago, and selection made 18.626s ago
  Next selection points
    Node scoped   :
  Uses frequency selection
  S  Input                     Last Selection Point         QL  Pri  Status
  == ========================  ========================  =====  ===  ===========
     Ethernet1/9               n/a                         PRC   99  Unmonitored
     Ethernet1/13              n/a                         PRC  100  Unmonitored
  21 Internal0[1]              n/a                         SEC  255  Freerun    <<

show frequency synchronization selection (without PTP Profile 8275-1)

The output of this command displays the detailed view of the different selection points within the system.

Note

This example shows the output when PTP profile 8275-1 is not configured.

The following is an example of the output of the show frequency synchronization selection slot / port command:

switch# show frequency synchronization selection==============
Selection point: System Clock (T0) Selector (3 inputs, 1 selected)
  Last programmed 00:03:04 ago, and selection made 00:02:54 ago
  Next selection points
    Node scoped   :
  Uses frequency selection
  Used for local line interface output
  S  Input                     Last Selection Point         QL  Pri  Status
  == ========================  ========================  =====  ===  ===========
  11 Ethernet1/9               n/a                         PRC   99  Locked     
     Ethernet1/13              n/a                         PRC  100  Available  
     Internal0[1]              n/a                         SEC  255  Available  
==============
Selection point: IEEE 1588 Clock Selector (3 inputs, 1 selected)
  Last programmed 00:03:04 ago, and selection made 3.296s ago
  Next selection points
    Node scoped   :
  Uses frequency selection
  S  Input                     Last Selection Point         QL  Pri  Status
  == ========================  ========================  =====  ===  ===========
     Ethernet1/9               n/a                         PRC   99  Unmonitored
     Ethernet1/13              n/a                         PRC  100  Unmonitored
  21 Internal0[1]              n/a                         SEC  255  Holdover   <<

show esmc counters all

The output of this command displays counters for sent and received ESMC SSMs.

The following is an example of the output of the show esmc counters all command:

ESMC Packet Counters of Interface Ethernet1/1:
    ESMC SSMs        Total  Information     Event    DNU/DUS
      Sent:              0            0         0          0
      Received:          0            0         0          0

ESMC Packet Counters of Interface Ethernet1/5:
    ESMC SSMs        Total  Information     Event    DNU/DUS
      Sent:              0            0         0          0
      Received:          0            0         0          0

ESMC Packet Counters of Interface Ethernet1/9:
    ESMC SSMs        Total  Information     Event    DNU/DUS
      Sent:           7685         7683         2          0
      Received:       7688         7682         6         19

----------------------------------------------------------------

show esmc counters interface ethernet

The output of this command displays counters for sent and received ESMC SSMs on a specific interface.

The following is an example of the output of the show esmc counters interface ethernet slot / port command:

ESMC Packet Counters of Interface Ethernet1/9:
    ESMC SSMs        Total  Information     Event    DNU/DUS
      Sent:           7955         7953         2          0
      Received:       7958         7952         6         19

----------------------------------------------------------------

Verifying the PTP Telecom Profile Configuration

After performing the PTP telecom profile configuration tasks, use this reference to verify the configuration.

show running-config ptp all

The output of this command displays global and interface configurations for PTP telecom profile.

The following is an example of the output of the show running-config ptp all command:

switch# show running-config ptp all
!Command: show running-config ptp all
!Running configuration last done at: Fri Feb 21 20:09:55 2020
!Time: Fri Feb 21 21:10:19 2020

version 9.3(5) Bios:version 01.00
feature ptp

ptp profile 8275-1
  mode hybrid
ptp source 0.0.0.0
ptp device-type boundary-clock
ptp priority1 128
ptp priority2 10
ptp pdelay-req-interval 0
no ptp notification type parent-change
no ptp notification type gm-change
no ptp notification type high-correction
no ptp notification type port-state-change
ptp correction-range 100000
no ptp correction-range logging
ptp management
ptp mean-path-delay 1000000000
ptp domain 24
ttag-marker-interval 60


interface Ethernet1/1
  ptp
  no ptp profile-override
  ptp destination-mac non-forwardable rx-no-match accept
  ptp transport ethernet
  ptp transmission multicast
  ptp role dynamic
  ptp cost 128
  ptp delay-request minimum interval -4
  ptp announce interval -3
  ptp sync interval -4
  ptp announce timeout 3

interface Ethernet1/6
  ptp
  no ptp profile-override
  ptp destination-mac non-forwardable rx-no-match accept
  ptp transport ethernet
  ptp transmission multicast
  ptp role dynamic
  ptp cost 128
  ptp delay-request minimum interval -4
  ptp announce interval -3
  ptp sync interval -4
  ptp announce timeout 3

interface Ethernet1/7
  ptp
  no ptp profile-override
  ptp destination-mac non-forwardable rx-no-match accept
  ptp transport ethernet
  ptp transmission multicast
  ptp role dynamic
  ptp cost 128
  ptp delay-request minimum interval -4
  ptp announce interval -3
  ptp sync interval -4
  ptp announce timeout 3

interface Ethernet1/8
  ptp
  no ptp profile-override
  ptp destination-mac non-forwardable rx-no-match accept
  ptp transport ethernet
  ptp transmission multicast
  ptp role dynamic
  ptp cost 128
  ptp delay-request minimum interval -4
  ptp announce interval -3
  ptp sync interval -4
  ptp announce timeout 3

Note

The output of the show running-config ptp all command displays a complete list of all the PTP configured interfaces.

show ptp parent

The output of this command displays the properties of a PTP parent.

The following is an example of the output of the show ptp parent command:

switch# show ptp parent
PTP PARENT PROPERTIES

Parent Clock:
Parent Clock Identity: 10:b3:d6:ff:fe:bf:a8:63
Parent Port Number: 0
Observed Parent Offset (log variance): N/A
Observed Parent Clock Phase Change Rate: N/A

Grandmaster Clock:
Grandmaster Clock Identity: 10:b3:d6:ff:fe:bf:a8:63
Grandmaster Clock Quality:
        Class: 248
        Accuracy: 254
        Offset (log variance): 65535
        Priority1: 128
        Priority2: 10

show ptp corrections

The output of this command displays up to the last 2000 correction details for each PTP slave port.

The following is an example of the output of the show ptp corrections command:

switch# show ptp corrections
PTP past corrections
-----------------------------------------------------------------------------------
Slave Port            SUP Time                 Correction(ns)    MeanPath Delay(ns)
----------  -------------------------------  ------------------  ------------------
Eth1/3      Thu Feb 20 22:51:02 2020 861523           4           260
Eth1/3      Thu Feb 20 22:51:02 2020 735961           4           260
Eth1/3      Thu Feb 20 22:51:02 2020 610170           4           268
Eth1/3      Thu Feb 20 22:51:02 2020 483106           0           280
Eth1/3      Thu Feb 20 22:51:02 2020 355745           0           280
Eth1/3      Thu Feb 20 22:51:02 2020 229924          -4           268
Eth1/3      Thu Feb 20 22:51:02 2020 104819          -4           268
Eth1/3      Thu Feb 20 22:51:01 2020 979604           8           272

show ptp clock

The output of this command displays the properties of the local clock, including clock identity.

The following is an example of the output of the show ptp clock command:

switch# show ptp clock
PTP Device Type : boundary-clock
PTP Device Encapsulation : NA
PTP Source IP Address : 0.0.0.0
Clock Identity : 10:b3:d6:ff:fe:bf:a8:63
Clock Domain: 24
Slave Clock Operation : Unknown
Master Clock Operation : Two-step
Slave-Only Clock Mode : Disabled
Number of PTP ports: 35
Priority1 : 128
Priority2 : 10
Clock Quality:
        Class : 248
        Accuracy : 254
        Offset (log variance) : 65535
Offset From Master : 0
Mean Path Delay : 0
Steps removed : 0
Correction range : 100000
MPD range : 1000000000
Local clock time : Wed Feb 26 17:08:34 2020
Hardware frequency correction : NA
PTP Clock state               : Free-Run

show ptp brief

The output of this command displays the PTP clock state for each configred port.

The following is an example of the output of the show ptp brief command:

switch# show ptp brief
PTP port status
-----------------------------------
Port                  State
--------------------- ------------
Eth1/1                Slave
Eth1/6                Disabled
Eth1/7                Disabled
Eth1/8                Disabled
Eth1/10               Master
Eth1/11               Disabled
Eth1/12               Disabled
Eth1/13               Master
Eth1/14               Disabled
Eth1/15               Disabled
Eth1/16               Disabled
Eth1/17               Disabled
Eth1/18               Disabled
Eth1/19               Disabled
Eth1/20               Disabled
Eth1/21               Disabled
Eth1/22               Disabled
Eth1/23               Disabled
Eth1/24               Disabled
Eth1/25               Disabled
Eth1/26               Disabled
Eth1/27               Disabled
Eth1/28               Disabled
Eth1/29               Disabled
Eth1/30               Disabled
Eth1/31               Disabled
Eth1/32               Disabled
Eth1/33               Disabled
Eth1/34               Disabled
Eth1/35               Disabled
Eth1/36               Disabled
Eth1/37               Disabled
Eth1/38               Disabled
Eth1/39               Disabled
Eth1/40               Disabled

show ptp clock foreign-masters record

The output of this command displays the state of foreign masters known to the PTP process. For each foreign master, the output displays the clock identity, basic clock properties, and whether the clock is being used as a grandmaster..

The following is an example of the output of the show ptp clock foreign-master-record command:

switch# show ptp port status
P1=Priority1, P2=Priority2, C=Class, A=Accuracy,
OSLV=Offset-Scaled-Log-Variance, SR=Steps-Removed
GM=Is grandmaster

---------   -----------------------  ---  ----  ----  ---  -----  --------
Interface         Clock-ID           P1   P2    C     A    OSLV   SR   
---------   -----------------------  ---  ----  ----  ---  -----  --------

Eth1/1    00:00:00:00:00:00:00:01    128  128   6     33   65535  0    GM

Cisco Nexus 9000 Hybrid PTP Platform

Available Languages

Download Options

Bias-Free Language

New and Changed Information

Hybrid PTP Platform Overview

Guidelines and Limitations

PTP Telecom Profile Guidelines and Limitations

Frequency Synchronization Guidelines and Limitations

Configuring PTP Globally

Before you begin

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Configuring PTP on an Interface

Before you begin

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

PTP Profile Defaults

Licensing Requirements for Synchronous Ethernet (SyncE)

Enabling Frequency Synchronization

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Configuring Frequency Synchronization on an Interface

Before you begin

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Example:

Verifying the Configuration

Verifying the Frequency Synchronization Configuration

show frequency synchronization configuration errors

show running-config fsync_mgr all

show frequency synchronization interface brief

show frequency synchronization interface ethernet

show frequency synchronization selection (with PTP Profile 8275-1)

show frequency synchronization selection (without PTP Profile 8275-1)

show esmc counters all

show esmc counters interface ethernet

Verifying the PTP Telecom Profile Configuration

show running-config ptp all

show ptp parent

show ptp corrections

show ptp clock

show ptp brief