Example for Configuring 1588v2 Time Synchronization
Networking Requirements
In Figure 1, the bearer network carries wireless services between NodeBs, and all bearer network nodes support 1588v2. IN addition, NodeB1 and NodeB2 support 1588v2. In this way, wireless base stations and bearer network devices achieve frequency and time synchronization. Because all the devices on the bearer network support 1588v2, clock information can be transmitted in network-wide BC mode.
Configuration Roadmap
The configuration roadmap is as follows:
Configure input of external clock signals.
Configure the type of 1588v2-capable devices on the bearer network as BC.
Configure PE1 and PE2 as system master clocks and connect them to external clocks. PE1 and PE2 back up each other.
Set the delay mechanism to Pdelay.
Procedure
- Configure a clock source.# Configure PE1 to input clock signals from the PTP clock source to implement frequency synchronization. The configurations of PE2, CE1, and CE2 are similar to the configuration of PE1.
<HUAWEI> system-view [HUAWEI] sysname PE1 [PE1] clock ethernet-synchronization enable [PE1] clock source ptp synchronization enable slot 0 [PE1] clock source ptp priority 10 slot 0 [PE1] clock source ptp ssm prc slot 0
- Globally enable PTP and configure the device type as BC.
# Configure PE1. The configurations of PE2, CE1, and CE2 are similar to the configuration of PE1.
[PE1] ptp enable [PE1] ptp device-type bc slot 0
- Enable PTP on the interface.
# Configure PE1. The configurations of PE2, CE1, and CE2 are similar to the configuration of PE1.
[PE1] interface XGigabitEthernet 0/0/1 [PE1-XGigabitEthernet0/0/1] ptp delay-mechanism pdelay [PE1-XGigabitEthernet0/0/1] ptp enable [PE1-XGigabitEthernet0/0/1] quit [PE1] interface XGigabitEthernet 0/0/2 [PE1-XGigabitEthernet0/0/2] ptp delay-mechanism pdelay [PE1-XGigabitEthernet0/0/2] ptp enable [PE1-XGigabitEthernet0/0/2] quit [PE1] interface XGigabitEthernet 0/0/3 [PE1-XGigabitEthernet0/0/3] ptp delay-mechanism pdelay [PE1-XGigabitEthernet0/0/3] ptp enable [PE1-XGigabitEthernet0/0/3] quit
- Verify the configuration.
After completing the configurations, run the display ptp all command on CE1 and CE2 to view the PTP synchronization status. The following example uses the command output on CE1.
[CE1] display ptp all
Device config info ------------------------------------------------------------------------------ PTP state :enabled Domain value :0 Slave only :no Device type :BC Set port state :no Local clock ID :00259e1000000001 Virtual clock ID :no Time lock success :yes PTP profile :IEEE1588V2 BMC run info ------------------------------------------------------------------------------ Grand clock ID :00259e1000000002 Receive number :XGigabitEthernet0/0/2 Parent clock ID :00259e1000000002 Parent portnumber :4126 Priority1 :110 Priority2 :110 Step removed :1 Clock accuracy :0x31 Clock class :6 Time Source :0xa0 UTC Offset :35 UTC Offset Valid :False Timescale :ARB Time traceable :False Leap :None Frequency traceable :False Offset scaled :0xffff Port info Name State Delay-mech Ann-timeout Type Domain ------------------------------------------------------------------------------ XGigabitEthernet0/0/1 master delay 4 BC 0 XGigabitEthernet0/0/2 slave delay 4 BC 0 Time Performance Statistics(ns): Slot 1 Card 0 Port 1 ------------------------------------------------------------------------------ Realtime(T2-T1) :140 Pathdelay :0 Max(T2-T1) :3510286792100 Min(T2-T1) :-5715158684 Clock source info Clock Pri1 Pri2 Accuracy Class TimeSrc Signal Switch Direction In-Status ------------------------------------------------------------------------------ local 128 128 0x31 187 0xa0 - - - -
Configuration Files
CE1 configuration file
# sysname CE1 # clock ethernet-synchronization enable clock source ptp priority 10 slot 0 clock source ptp ssm prc slot 0 clock source ptp synchronization enable slot 0 # ptp enable ptp device-type bc slot 0 # interface XGigabitEthernet0/0/1 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/2 ptp delay-mechanism pdelay ptp enable # return
CE2 configuration file
# sysname CE2 # clock ethernet-synchronization enable clock source ptp priority 10 slot 0 clock source ptp ssm prc slot 0 clock source ptp synchronization enable slot 0 # ptp enable ptp device-type bc slot 0 # interface XGigabitEthernet0/0/1 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/2 ptp delay-mechanism pdelay ptp enable # return
PE1 configuration file
# sysname PE1 # clock ethernet-synchronization enable clock source ptp priority 10 slot 0 clock source ptp ssm prc slot 0 clock source ptp synchronization enable slot 0 # ptp enable ptp device-type bc slot 0 # interface XGigabitEthernet0/0/1 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/2 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/3 ptp delay-mechanism pdelay ptp enable # return
PE2 configuration file
# sysname PE2 # clock ethernet-synchronization enable clock source ptp priority 10 slot 0 clock source ptp ssm prc slot 0 clock source ptp synchronization enable slot 0 # ptp enable ptp device-type bc slot 0 # interface XGigabitEthernet0/0/1 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/2 ptp delay-mechanism pdelay ptp enable # interface XGigabitEthernet0/0/3 ptp delay-mechanism pdelay ptp enable # return