NTP PTP Interworking issue

jhalldn — Thu, 08 Oct 2020 06:29:03 GMT

Hi community!

We have a couple of ASR 9901 with IOS XR 6.6.3 (all SP and SMUs, i hope). The ASR9k box is connected in a chain of PTP G.8275.1 and the chain is using SyncE as frequency synchronization. I my knowledge, we do have PTP and SyncE working. We have activated the interworking between PTP and NTP, but the box do not use it...it still uses a timeserver with only NTP. How can i get this to work and make ASR9k to choose PTP as best source?

!
ntp
 authentication-key 1 md5 encrypted xxxxx
 authenticate
 trusted-key 1
 server 192.0.2.1 key 1 iburst source Loopback0
 master primary-reference-clock
 source Loopback0
 update-calendar
 log-internal-sync
!
frequency synchronization
 quality itu-t option 1
 clock-interface timing-mode system
 log selection changes
!
ptp
 clock
  domain 24
  profile g.8275.1 clock-type T-BC
  timescale PTP
  time-source PTP
 !
 profile SLAVE
  multicast target-address ethernet 01-1B-19-00-00-00
  transport ethernet
  port state slave-only
  sync frequency 16
  clock operation one-step
  announce frequency 8
  delay-request frequency 16
 !
interface GigabitEthernet0/0/0/1
 description ** to  PTP Master**
 cdp
 ptp
  profile SLAVE
  local-priority 1
 !
 ipv4 address 192.0.2.100 255.255.255.252
 load-interval 30
 frequency synchronization
  selection input
  priority 10
 !
 transceiver permit pid all
!

Here's some output:

RP/0/RSP0/CPU0:Router#sh freq sync int bri
Thu Oct  8 08:26:27.396 CEST
Flags:  > - Up                D - Down              S - Assigned for selection
        d - SSM Disabled      x - Peer timed out    i - Init state
        s - Output squelched
Fl   Interface                QLrcv QLuse Pri QLsnd Output driven by
==== ======================== ===== ===== === ===== ========================
>S   GigabitEthernet0/0/0/1   PRC   PRC    10 DNU   GigabitEthernet0/0/0/1 

RP/0/RSP0/CPU0:Router#sh ptp int bri
Thu Oct  8 08:26:53.239 CEST
Intf              Port         Port                  Line
Name              Number       State        Encap    State         Mechanism
--------------------------------------------------------------------------------
Gi0/0/0/1         1            Slave        Ethernet up            1-step DRRM

RP/0/RSP0/CPU0:Router#sh ntp ass
Thu Oct  8 08:27:10.259 CEST

      address         ref clock     st  when  poll reach  delay  offset    disp
*~192.0.2.1        .MRS.             1   302  1024  377    1.82   0.000   0.015
 ~127.127.45.1     .PTP.             0  77335  1024    0    0.00   0.000  15.938
 * sys_peer, # selected, + candidate, - outlayer, x falseticker, ~ configured

topic NTP PTP Interworking issue in XR OS and Platforms

NTP PTP Interworking issue