Nokia 7210 SAS-M User Manual

System Management
298
7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
3HE 16132 AAAB TQZZA Edition: 01
For a change of value from ssu to ptp (or vice-versa) to take effect, the operator
must save the configuration changes and reboot the node.
• On the 7210 SAS-R6 and 7210 SAS-R12, only the BITS1 port can be used to
provide a reference to the system clock or to distribute the reference. The use
of the BITS2 port is not supported.
• On the 7210 SAS-T and 7210 SAS-Mxp, both the BITS1 and BITS2 ports can
be used to provide a reference to the system clock or to distribute the reference.
• On the 7210 SAS-M, Nokia strongly recommends using PTP in hybrid mode
only. Hybrid mode facilitates reduced PTP packet rates and improved scalability.
• On the 7210 SAS-Mxp, 7210 SAS-R6, 7210 SAS-R12, 7210 SAS-Sx 1/10GE,
and 7210 SAS-T, an IP address must be configured under
config>system>security>source-address>application ptp, before PTP can
be enabled for use. The use of the system IPv4 interface address or other
loopback IPv4 interface address is recommended for PTP applications. The
IPv4 address of an IPv4 interface over a port can also be used. The PTP
software uses the configured IP address as the source IP address for both
configured peers and discovered peers.
• On the 7210 SAS-Mxp, 7210 SAS-R6, 7210 SAS-R12, and 7210 SAS-T, 1 pps
and 10 MHz interface signals should only be used when PTP is enabled. Use
these signals only after determining that the system is configured to use PTP as
a reference and is locked to PTP.
• The 7210 SAS-S 1/10GE does not support IEEE 1588v2 PTP.
• On the 7210 SAS-Mxp, 7210 SAS-R6, 7210 SAS-R12, 7210 SAS-Sx 1/10GE,
and 7210 SAS-T, PTP port-based timestamping is enabled by default on all
ports for all PTP packets at system bootup.
- When this feature is enabled, PTP packets are not forwarded transparently
through the node, regardless of the service used and whether PTP is
configured as a system clock reference. To enable transparent forwarding,
refer to PTP Message Transparent Forwarding.
- Regardless of whether PTP is enabled (configure>sync-if-timing>ptp>no
shutdown) or disabled (configure>sync-if-timing>ptp>shutdown), the
timestamp value stored in the correction-field (CF) is updated for all PTP
packets that are in transit through the node. This affects all PTP packets
that are not originated or terminated on the node.
To prevent this occurrence, disable PTP port-based hardware timestamps
on specific (all or select) ports by configuring the configure>port>no ptp-
hw-timestamp CLI command on ports where PTP packets are in transit.
When the feature is disabled, PTP packets in transit are transparently
forwarded without changing the timestamp value.

Nokia 7210 SAS-M Specifications

General

Brand	Nokia
Model	7210 SAS-M
Category	Cell Phone
Language	English