On an SMPTE-2059-2 network, time signals are typically imported from an external building integrated timing supply system (BITS) source. Multiple routers can be configured to import time signals from an external BITS source before the grandmaster clock is determined.
A BITS source provides reference time signals. If dynamic best master clock (BMC) selection is used, multiple SMPTE-2059-2 devices can be configured to import BITS signals so that all these SMPTE-2059-2 devices can participate in BMC selection for the determination of the grandmaster clock. The grandmaster clock provides time signals for the entire SMPTE-2059-2 network, and other network devices use the SMPTE-2059-2 protocol to obtain clock synchronization information from the grandmaster clock. Perform the following steps on each router connected to an external BITS source on an SMPTE-2059-2 network:
Perform the following steps on each router connected to an external BITS source on an SMPTE-2059-2 network:
The system view is displayed.
Importing time signals from the 1PPS BITS1 interface is used as an example.
clock bits-type bits1 1pps input
The actual number of BITS interfaces and their IDs depend on the hardware configuration. For details about clock interfaces, see Hardware Description.
Generally, BITS0 provides frequency signals for physical clock synchronization and corresponds to CLK or CLK/TOD0 on the interface panel; BITS1 provides time signals and corresponds to TOD or CLK/TOD1 on the interface panel.
BITS1 signals are used as an example.
ptp clock-source bits1 on
The BITS1 interface is used as an example.
ptp clock-source bits1 { receive-delay receive-delay-value | send-delay send-delay-value }
The configuration is committed.