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NE40E-M2 V800R010C10SPC500 Configuration Guide - System Management 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - System Management
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Licensing Requirements and Limitations for 1588 ATR--M2E

Licensing Requirements and Limitations for 1588 ATR--M2E

Licensing Requirements

BOM

License Control Item

Description

Minimum Version Requirement

81400961

NE40E-M2 Series 1588v2 ATR Function License

Controllable feature:

This license controls 1588v2 ATR. This feature requires that the maximum number of switch hops does not exceed 3 and the number of microwave device hops does not exceed 4. A device requires one such license to support 1588v2 ATR.

V800R009

Restrictions and Guidelines

Restrictions

Guidelines

Impact

For the routers that support the 1588 ATR server function and comply with the G.8275.2 standard, the network deployment has the following limitations:
  • The uplink and downlink between the server and client are consistent and the path between the server and client must be unique.
  • The intermediate network includes up to 3 hops of microwave devices (4 devices) or three Layer 2 switches. Traversing routers is not supported.
  • PTP packets are exchanged between the server and client. The PTP packets can be Layer 3 IP packets or one-level VLAN labeled packet. The packets cannot carry two-level VLAN labels or MPLS labels.
  • The outbound interface on the server for sending PTP packets must support the 1588 TC mode.
  • Measurement and compensation for static asymmetry of upstream and downstream delay are required for 1588 packets on the primary and secondary devices.
  • When LAG exists on the intermediate network, the fibers of all LAG member links must have the same length. That is, the asymmetry of delay is fixed regardless of changes.
  • PTP packets have the highest priority. The intermediate network identifies the PTP packet priority for scheduling.
  • None.
  • Check the number of hops on the intermediate network and confirm whether such network can be deployed.
  • None.
  • Use TC-capable subcards.
  • None.
  • None.
  • Use the ptp-adaptive dscp dscp-value command to configure the priority of ATR packets. The default priority value is 56, which indicates the highest priority.

The requirement for time synchronization performance cannot be met.

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Updated: 2019-01-02

Document ID: EDOC1100058392

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