R3303-HP HSR6800 Routers High Availability Configuration Guide
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• The port is configured as a MIP or inward-facing MEP, which can still receive and send CFD
messages except CCM messages.
For more information about the spanning tree feature, see Layer 2—LAN Switching Configuration Guide.
Configuring basic CFD settings
Enabling CFD
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enable CFD.
cfd enable CFD is disabled by default.
Configuring the CFD protocol version
Three CFD protocol versions are available: IEEE 802.1ag draft5.2 version, IEEE 802.1ag draft5.2 interim
version, and IEEE 802.1ag standard version. Devices in the same MD must use the same CFD protocol
version. Otherwise, they cannot exchange CFD protocol packets.
If an MD is created by using the cfd md command or automatically generated by using the cfd
service-instance maid format command on a device, you cannot switch between the standard version
and draft5.2 version (or draft5.2 interim version). However, you can switch between the draft5.2 version
and draft5.2 interim version. This restriction does not apply to the device without an MD configured.
To configure the CFD protocol version:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Configure the CFD protocol
version.
cfd version { draft5 | draft5-plus |
standard }
Optional.
By default, CFD uses the standard
version of IEEE 802.1ag.
Configuring service instances
Before configuring the MEPs and MIPs, you must first configure service instances. A service instance is a
set of service access points (SAPs), and belongs to an MA in an MD.
A service instance is indicated by an integer to represent an MA in an MD. The MD and MA define the
level and VLAN attribute of the messages handled by the MPs in a service instance.
A service instance can be one that has an MD name or one that does not have an MD name. The former
applies to any CFD protocol version, and the latter only applies to the IEEE 802.1ag standard version.
You can select either one as needed.
An MD name must be in compliant with the specifications in table 21-19 in IEEE802.1ag-2007.