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12-8
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 12 IEEE 1588v2 PTP Support
Configuring IEEE 1588v2 PTP
Configuring Input or Output Network Clocking
We recommend that you configure a stable input clock source from a GPS device before configuring PTP
master. The GPS device acts as a PTP grand master, and the BITS or 10-MHz port of a Cisco ASR
1002-X Router can be used to input or output the network clock. Perform these tasks to configure
network clocking on a Cisco ASR 1002-X Router:
• Configuring Input Clocking
• Configuring Output Clocking
See the module Synchronous Ethernet Support for more information on network clocking.
Configuring an Ordinary Clock
You can configure a Cisco ASR 1002-X Router in Ordinary clock mode as either master or slave.
Figure 12-7 Ordinary Clock Scenario with a GPS Device as Grand Master
Perform these tasks to configure an ordinary clock as either master or slave:
• Configuring an Ordinary Clock as PTP Master, page 12-8
• Configuring an Ordinary Clock as PTP Slave, page 12-10
Configuring an Ordinary Clock as PTP Master
This section describes how to configure an ordinary clock as PTP master.
SUMMARY STEPS
1. configure terminal
2. ptp clock ordinary domain domain_number
3. clock-port name master
4. transport ipv4 unicast interface {GigabitEthernet | Loopback} interface-number {negotiation}
5. clock destination ip-address
6. sync interval interval
7. end
PTP SlavePTP Master
Gige linkClock E1/10MHz
GPS antenna
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