Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 231
6.4.6 IEEE 1588v2 PTP
Precision Time Protocol (PTP) is a timing-over-packet protocol defined in the IEEE
1588v2 standard 1588 2008.
PTP may be deployed as an alternative timing-over-packet option to ACR. PTP
provides the capability to synchronize network elements to a Stratum-1 clock or
primary reference clock (PRC) traceable source over a network that may or may not
be PTP-aware. PTP has several advantages over ACR. It is a standards-based
protocol, has lower bandwidth requirements, can transport both frequency and time,
and can potentially provide better performance.
There are five basic types of PTP devices, as listed below:
• ordinary clock (master or slave)
• boundary clock
• end-to-end transparent clock
• peer-to-peer transparent clock
• management node
Table 25 lists the types of PTP support on each fixed platform; Table 26 lists the
types of PTP support on each card for the 7705 SAR-8 and the 7705 SAR-18.
Table 25 IEEE 1588v2 PTP Support per Fixed Platform
Sync Type PTP Clock Type 7705 SAR-A (Both Variants)
7705 SAR-Ax
7705 SAR-H
7705 SAR-Hc
7705 SAR-M (All Variants)
7705 SAR-W
7705 SAR-Wx (All Variants)
7705 SAR-X
Freq Ordinary Slave Yes
Boundary Clock Yes
End-to-End Transparent
Clock
Yes
Ordinary Master Yes
To Next Page
Loading...
