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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 22 Configuring Clocking
Configuring PTP for the Cisco ASR 901 Router
Step 3
ptp clock ordinary domain
domain
Example:
Router(config)# ptp clock ordinary
domain 4
Configures the PTP ordinary clock and enters clock
configuration mode.
• domain—The PTP clocking domain number. Valid
values are from 4 to 23.
Step 4
clock-port
port-name
{master |
slave} [profile g8265.1]
Example:
Router(config-ptp-clk)# clock-port
Slave slave
Sets the clock port to PTP slave mode and enters clock port
configuration mode. In slave mode, the port exchanges
timing packets with a PTP master clock.
The profile keyword configures the clock to use the
G.8265.1 recommendations for establishing PTP sessions,
determining the best master clock, handling SSM, and
mapping PTP classes.
Note Using a telecom profile requires that the clock have
a domain number of 4–23.
Step 5
transport ipv4 unicast interface
interface-type interface-number
Example:
Router(config-ptp-port)# transport
ipv4 unicast interface loopback 0
Sets port transport parameters.
• interface-type—The type of the interface.
• interface-number—The number of the interface.
Step 6
clock source
source-address
[
priority
]
Example:
Router(config-ptp-port)# clock
source 8.8.8.1
Specifies the address of a PTP master clock. You can
specify a priority value as follows:
• No priority value—Assigns a priority value of 0, the
highest priority.
• 1—Assigns a priority value of 1.
• 2—Assigns a priority value of 2.
Step 7
clock source
source-address
[
priority
]
Example:
Router(config-ptp-port)# clock
source 8.8.8.2 1
Specifies the address of an additional PTP master clock;
repeat this step for each additional master clock. You can
configure up to four master clocks.
Step 8
clock source
source-address
[
priority
]
Example:
Router(config-ptp-port)# clock
source 8.8.8.3 2
Specifies the address of an additional PTP master clock;
repeat this step for each additional master clock. You can
configure up to four master clocks.
Command Purpose