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Configuration Guide - Reliability

CloudEngine 12800 and 12800E V200R002C50

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, EFM Configuration, and CFM Configuration.
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Licensing Requirements and Limitations for CFM

Licensing Requirements and Limitations for CFM

Involved Network Elements

Other network elements are required to support CFM functions.

Licensing Requirements

CFM is a basic feature of a switch and is not under license control.

Version Requirements

Table 7-9 Products and minimum version supporting CFM

Product

Minimum Version Required

CE12804/CE12808/CE12812/CE12816

V200R002C50

CE12804S/CE12808S

V200R002C50

CE12800E (configured with FD-X series cards)

V200R005C00

Feature Limitations

When CFM is used in combination with other features, it has the following limitations:

  • CFM and M-LAG cannot be configured simultaneously.

CFM has the following limitations:

  • After CC is configured to be based on the directly connected interface, if a CC that is based on the interface number and VLAN ID is also configured on the same link, ensure that outgoing CCMs are tagged.

  • When there is an MIP interface on the receiver in a VLAN, LT packets cannot reach the MEP and MEP information cannot be obtained.

  • The device where an interface is removed from a VLAN still learns the MAC address of the VLAN when the directly connected device is configured with CFM and sends CCMs from this VLAN.

  • There are limitations on the interval at which a MEP sends or detects CCMs:

    • When the interval is set to 50 ms, a maximum of 10 MEPs on the switch can be enabled to send CCMs and a maximum of two interfaces on each MEP can send CCMs.

    • When the interval is set to 100 ms, a maximum of 100 MEPs on the switch can be enabled to send CCMs and a maximum of two interfaces on each MEP can send CCMs.

    • When the interval is set to 1000 ms or 10000 ms, a maximum of 1000 MEPs on the switch can be enabled to send CCMs and a maximum of two interfaces on each MEP can send CCMs.

  • The recommended interval for sending or detecting CCMs is at least 1000 ms. If the interval is smaller than 1000 ms, network flapping may occur when the device load is heavy or the CPU usage is high.

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Updated: 2019-03-21

Document ID: EDOC1000166606

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