Solved: Hi Thomas,

Thomas P · ‎04-19-2016

Hello,

I have an issue to synchronize the network clock of my ISR 4321 with my operator.

Here is the configuration in place:

controller E1 0/1/0
framing no-crc4
clock source line primary
pri-group timeslots 1-31

!

network-clock synchronization automatic
network-clock input-source 1 controller E1 0/1/0

The result of the show network-clock command:

There are no network clock sources configured
Active source = UNAVAILABLE

All Network Clock Configuration
---------------------------------
Priority Clock Source State Reason

Current operating mode is Revertive

Current OOR Switchover mode is Switchover

There are no slots disabled from participating in network clocking

Is there a command missing?

Thanks for your help.

Thomas.

Deepak Mehta · ‎04-20-2016

29th Path code violations --- looks to be framing issue between you and service provider.

Please check with your service provide as framing issue can affect the clock syncronization.

View solution in original post

Deepak Mehta · ‎04-19-2016

These two commands is configured on my set up and works good.

network-clock-select 1 {E1|T1} 0/1/0 -it will select which priority interface will be used for taking clock.

clock source line - take the clock from the service the service prvoider.

Thomas P · ‎04-19-2016

Hello,

Thanks you for your reply but these commands are not present on Cisco ISR 4321.

Deepak Mehta · ‎04-20-2016

ah for 4300 series commands have changed a little.

The commands which you have applied are correct and you can also include below to synchronize individual channels.

network-clock synchronization participate slot / subslot

Below samples config

Sample Configuration

card type t1 0 2
card type t1 0 3
!
isdn switch-type primary-5ess
!
network-clock synchronization automatic >>>>>>>>>>>>>>>>>
network-clock synchronization participate 0/2>>>>>>>>>>>>>>>
!
voice-card 0/2
  dsp services dspfarm
  no watchdog
!
controller T1 0/2/0
  framing esf
  linecode b8zs

  clock source line primary

  network-clock input-source 1 controller t1 0/2/0>>>>>>>>>>>>>>>>>>
  cablelength long 0db
  pri-group timeslots 1-24 voice-dsp

Thomas P · ‎04-20-2016

Hello,

When I enter your command, I have the following:

Router(config)#network-clock synchronization participate 0/1
Slot 0 subslot 1 is already enabled for network clocking. Command Aborted.

Deepak Mehta · ‎04-20-2016

Try " clock source network" first and see if it works.

Also try below inside the controller interface.Thanks

network-clock input-source 1 controller t1 0/1/0

Thomas P · ‎04-20-2016

The router doesn't accept the commands:

Router(config)#clock source network ?
% Unrecognized command
Router(config)#controller E1 0/1/0
Router(config-controller)#?
Controller configuration commands:
ais-shut          Send LAIS when shutdown
bert              Start BERT test
channel-group     Specify the timeslots to channel-group mapping for an interface
clock             Specify the clock source for a DS1 link
default           Set a command to its defaults
description       Controller specific description
ds0-group         Configure group of timeslots to a particular signaling type
exit              Exit from controller configuration mode
framing           Specify the type of Framing on a E1 link
help              Description of the interactive help system
line-termination Specify the line termination for E1
linecode          Specify the line encoding method for a E1 link
logging-events    LOG E1 Events
loopback          Put the entire E1 line into loopback
national          Set E1 National Reserve Bits.
no                Negate a command or set its defaults
pri-group         Configure the specified timeslots for PRI
shutdown          Shut down a E1 link (send Blue Alarm)
snmp              Modify SNMP controller parameters
tdm-group         Configure DS0 group for TDM
trunk-group       Configure interface to be in a trunk group

Here are the logs I see time to time:

Apr 20 17:26:36.975: %NETCLK-6-SRC_UPD: Synchronization source E1 0/1/0 status (Signal Failure clear) is posted to all selection process.
Apr 20 17:26:36.975: %NETCLK-6-SRC_UPD: Synchronization source E1 0/1/0 status (Critical Alarms clear) is posted to all selection process.
Apr 20 17:26:36.977: %NETCLK-6-SEL_CLOCK_SRC: Synchronization source E1 0/1/0 is selected by selection process(T0) to synchronize the system and generate T0 output.

Deepak Mehta · ‎04-20-2016

You need to type the clock source command inside controller config.

What you have given isn't correct."Router(config)#clock source network ?"

Please go in controller config and then enter

Router(config)# controller t1 0/1/1

Router(config-controller)# clock source network

Thomas P · ‎04-20-2016

I entered your command:

Router(config)#controller E1 0/1/0
Router(config-controller)#clock source network

This command replace the command clock source line primary I had before.

It doesn't seem to work better:

Router#sh network-clocks synchronization
Symbols:     En - Enable, Dis - Disable, Adis - Admin Disable
             NA - Not Applicable
             * - Synchronization source selected
             # - Synchronization source force selected
             & - Synchronization source manually switched

Automatic selection process : Enable
Equipment Clock : 2048 (EEC-Option1)
Clock Mode : QL-Disable
ESMC : Disabled
SSM Option : 1
T0 : Internal
Hold-off (global) : 300 ms
Wait-to-restore (global) : 300 sec
Tsm Delay : 180 ms
Revertive : No

Nominated Interfaces

Interface            SigType     Mode/QL      Prio QL_IN ESMC Tx ESMC Rx
*Internal             NA          NA/Dis       251   QL-SEC    NA        NA
E1 0/1/0             NA          NA/Dis       1     QL-FAILED NA        NA

With the clock source line primary command:

Router#sh network-clocks synchronization
Symbols:     En - Enable, Dis - Disable, Adis - Admin Disable
             NA - Not Applicable
             * - Synchronization source selected
             # - Synchronization source force selected
             & - Synchronization source manually switched

Automatic selection process : Enable
Equipment Clock : 2048 (EEC-Option1)
Clock Mode : QL-Disable
ESMC : Disabled
SSM Option : 1
T0 : E1 0/1/0
Hold-off (global) : 300 ms
Wait-to-restore (global) : 300 sec
Tsm Delay : 180 ms
Revertive : No

Nominated Interfaces

Interface            SigType     Mode/QL      Prio QL_IN ESMC Tx ESMC Rx
Internal             NA          NA/Dis       251   QL-SEC    NA        NA
*E1 0/1/0             NA          NA/Dis       1     QL-SEC    NA        NA

Thank you for your help.

Deepak Mehta · ‎04-20-2016

Try to bounce ( shut/no shut) the E1 controller .

Can you paste "sh controller e1" output.Thank you

Thomas P · ‎04-20-2016

Following, the requested output:

Router#sh controllers E1 0/1/0
E1 0/1/0 is up.
Applique type is Channelized E1 - balanced
Description: *** E1/T2 SFR 3 ***
No alarms detected.
alarm-trigger is not set
Framing is no-crc4, Line Code is HDB3, Clock Source is Network.
International Bit: 1, National Bits: 11111
Data in current interval (190 seconds elapsed):
     0 Line Code Violations, 29 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     28 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Deepak Mehta · ‎04-20-2016

29th Path code violations --- looks to be framing issue between you and service provider.

Please check with your service provide as framing issue can affect the clock syncronization.

Aman Soi · ‎04-20-2016

Hi Thomas,

Do you get the below command under controller ?

network-clock input-source priority controller [t1|e1] slot/bay/port

can u share show inventory /show diag?

regds,

aman

Thomas P · ‎04-21-2016

Hello,

I can't enter this command:

Router(config)#controller E1 0/1/0
Router(config-controller)#?
Controller configuration commands:
ais-shut          Send LAIS when shutdown
bert              Start BERT test
channel-group     Specify the timeslots to channel-group mapping for an interface
clock             Specify the clock source for a DS1 link
default           Set a command to its defaults
description       Controller specific description
ds0-group         Configure group of timeslots to a particular signaling type
exit              Exit from controller configuration mode
framing           Specify the type of Framing on a E1 link
help              Description of the interactive help system
line-termination Specify the line termination for E1
linecode          Specify the line encoding method for a E1 link
logging-events    LOG E1 Events
loopback          Put the entire E1 line into loopback
national          Set E1 National Reserve Bits.
no                Negate a command or set its defaults
pri-group         Configure the specified timeslots for PRI
shutdown          Shut down a E1 link (send Blue Alarm)
snmp              Modify SNMP controller parameters
tdm-group         Configure DS0 group for TDM
trunk-group       Configure interface to be in a trunk group
Router(config-controller)#network-clock input-source priority controller E1 0/1/0
                                    ^
% Invalid input detected at '^' marker.

Attached, the requested show commands.

Thank you for your help.

Aman Soi · ‎04-21-2016

Hi Thomas,

I was just referring this link where the command is appearing. even link says

"When the NIM is used for voice applications, all voice T1/E1s have to be synchronized to a single clock source and any difference in clocks risk clock slips or interface flaps"

What is show version of router?

http://www.cisco.com/c/en/us/support/docs/routers/4000-series-integrated-services-routers/118792-config-isr-00.html

card type { t1 | e1 } slot subslot

network-clock synchronization automatic

network-clock synchronization participate slot / subslot

voice-card slot
   codec complexity { flex [ reservation-fixed { high | medium }]
| high | medium | secure }

controller { t1 | e1 } slot / subslot / port
   framing {sf | esf}
   or
   framing {crc4 | no-crc4}

   linecode {ami | b8zs}
   or
   linecode { ami | hdb3 }

   network-clock input-source priority controller [t1|e1] slot/bay/port

   pri-group timeslots timeslot-range [ nfas_d | service ][voice-dsp]

regds,

aman

Network-clock synchronization PSTN

Sample Configuration