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PTP (Precision Time Protocol) configuration

Hi,

Is there anyone has configured PTP on IE-3000 switches? I have some problems with the configuration and operation. Below is the summary of what I've done and the porblems.

         

There are two IE-3000 switches with ip services 15.0 (2) SE4 IOS. One has configured in the boundary mode to become master clock and the other one has left in the e2etransparent mode. There are two inter-connection links (via Cat6 ethernet cable) on Gi1/1 and Gi1/2 interfaces on both switches. All inter-connect ports are up and running. Both switches have same IOS, same hardware almost identical except IP configuration etc. Main problem is SW2 is not able to sync with SW1 as master clock (this is my understanding), and also it seems PTP on SW1 has wrong reading of local clock time. But in fact I have NTP server in the network and NTP is syncd. I've included some of the configuration and output here, if someone has experience in configuring and running PTP I would be thankful to give me some help here.

Regards,

Tohid

Configuration on SW1:

ptp mode boundary

ptp priority1 10

ptp priority2 128

ptp time-property persist 300

SW1#show ptp clock

PTP CLOCK INFO

  PTP Device Type: Boundary clock

  Clock Identity: 0x8:CC:68:FF:FE:7F:73:80

  Clock Domain: 0

  Number of PTP ports: 10

  Priority1: 10

  Priority2: 128

  Clock Quality:

        Class: 248

        Accuracy: Unknown

        Offset (log variance): N/A

  Offset From Master: 0

  Mean Path Delay: 0

  Steps Removed: 0

  Local clock time: 00:30:30 UTC Mar 1 1993

SW1#sh clock

16:18:10.856 UTC Thu Feb 27 2014

SW1#sh ntp status

Clock is synchronized, stratum 3, reference is 10.1.1.1

nominal freq is 119.2092 Hz, actual freq is 119.2091 Hz, precision is 2**17

reference time is D6B9E25E.3EAA5D0E (16:12:14.244 UTC Thu Feb 27 2014)

clock offset is 45.5794 msec, root delay is 1.42 msec

root dispersion is 57.46 msec, peer dispersion is 5.25 msec

loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000000985 s/s

system poll interval is 64, last update was 423 sec ago.

SW2#sh ptp clock

PTP CLOCK INFO

  PTP Device Type: End to End transparent clock

  Clock Identity: 0x3C:E:23:FF:FE:44:92:80

  Clock Domain: 0

  Number of PTP ports: 10

  Delay Mechanism: End to End

  Local clock time: 01:08:13 UTC Mar 4 1993

SW2#sh ptp port gi 1/1

PTP PORT DATASET: GigabitEthernet1/1

  Port identity: clock identity: 0x3C:E:23:FF:FE:44:92:80

  Port identity: port number: 9

  PTP version: 2

Port state FAULTY: FALSE

SW1#sh ptp port gi 1/1

PTP PORT DATASET: GigabitEthernet1/1

  Port identity: clock identity: 0x8:CC:68:FF:FE:7F:73:80

  Port identity: port number: 9

  PTP version: 2

  Port state: MASTER

  Delay request interval(log mean): 5

  Announce receipt time out: 3

  Peer mean path delay: 0

  Announce interval(log mean): 1

  Sync interval(log mean): 0

  Delay Mechanism: End to End

  Peer delay request interval(log mean): 0

  Sync fault limit: 5000000004271-NET-001#sh ptp port gi 1/1
PTP PORT DATASET: GigabitEthernet1/1
  Port identity: clock identity: 0x8:CC:68:FF:FE:7F:73:80
  Port identity: port number: 9
  PTP version: 2
  Port state: MASTER
  Delay request interval(log mean): 5
  Announce receipt time out: 3
  Peer mean path delay: 0
  Announce interval(log mean): 1
  Sync interval(log mean): 0
  Delay Mechanism: End to End
  Peer delay request interval(log mean): 0
  Sync fault limit: 500000000

      

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