Nokia 7210 SAS-M User Manual

7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
System Management
Edition: 01 3HE 16132 AAAB TQZZA 293
• On 7210 SAS-Mxp, 7210 SAS-T, 7210 SAS-R6, 7210 SAS-R12,
7210 SAS-Sx 10/100GE, and 7210 SAS-Sx 1/10GE, if the ptp-hw-timestamp
command is enabled by executing the command on a set of ports, the node
processes PTP packets that transit those ports to update the correction field for
the packet residence time in the node. This allows for accurate computation by
PTP time and frequency recovery algorithms on PTP slave clocks that are
connected to those ports.
• The command to enable PTP hardware timestamps for packets transiting the
node should be configured on both the ingress and egress port where PTP
packets are expected to be received and sent from (and where they need to be
processed to update correction time). Configuring the PTP hardware timestamp
command on only the ingress port or egress port is not recommended because
this will result in incorrect updates to the correction field.
• For 7210 SAS-R6 and 7210 SAS-R12 platforms with IMM-b (IMMv2) and IMM-
c cards, and for the 7210 SAS-Mxp and 7210 SAS-Sx 1/10GE, to enable
transparent forwarding of PTP packets over MPLS tunnels, PTP hardware port-
based timestamping must be disabled on the access ports where SAPs are
configured. These access ports are used to connect to either PTP master or PTP
slaves that need to establish and exchange PTP messages transparently. PTP
hardware port-based timestamping does not need to be disabled on the network
ports where the MPLS tunnels originate and terminate. This means that these
network ports can be used for PTP packet exchange when the node is a PTP
boundary clock or ordinary clock slave. If the requirement is to forward PTP
packets transparently when MPLS uplinks are not used or when a hybrid port
with a SAP is used, PTP hardware port-based timestamping must be disabled
on the access port and hybrid port.
• On the 7210 SAS-Mxp and 7210 SAS-Sx 1/10GE, PTP messages for the
G.8265.1 and IEEE 1588v2 profiles are transparently forwarded only for a VPRN
service on which hardware timestamping is enabled on the access port. This
restriction only applies to PTP packets that are using IP/UDP unicast
encapsulation.
• To enable transparent forwarding of PTP packets over MPLS tunnels on the
7210 SAS-T and 7210 SAS-R6 platforms installed with IMMv1 cards, you must
disable hardware timestamping on access ports where SAPs are configured,
and on the MPLS tunnel originating and terminating network ports.
Consequently, these network ports cannot be used for PTP packet exchange
when the node is a PTP boundary clock or ordinary clock slave.
To use the node as a PTP boundary clock or ordinary clock slave, you must use
separate ports. In other words, a different access port, network port, or hybrid
port must be used for PTP message exchange when this node is configured to
be a PTP boundary clock or ordinary clock slave, and it cannot be any of the
ports (either ingress or egress ports) on which PTP packets are forwarded
transparently.

Nokia 7210 SAS-M Specifications

General

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