Cfd Configuration; Cfd Overview; Basic Concepts In Cfd - HP A5830 series Configuration Manual

High availability
Hide thumbs Also See for A5830 series:
Table of Contents

Advertisement

CFD configuration

CFD overview

CFD, which conforms to IEEE 802.1ag CFM, is an end-to-end per-VLAN link layer OAM mechanism
used for link connectivity detection, fault verification, and fault location.

Basic concepts in CFD

Maintenance domain
An MD defines the network where CFD plays its role. The MD boundary is defined by some MEPs
configured on the ports. An MD is identified by an MD name.
To accurately locate faults, CFD introduces eight levels (from 0 to 7) to MDs. The bigger the number, the
higher the level and the larger the area covered. Domains can touch or nest (if the outer domain has a
higher level than the nested one) but cannot intersect or overlap.
MD levels facilitate fault location and make fault location more accurate. As shown in
in light blue nests MD_B in dark blue. If a connectivity fault is detected at the boundary of MD_A, any of
the devices in MD_A, including Device A through Device E, may fail. If a connectivity fault is also
detected at the boundary of MD_B, the failure points may be any of Device B through Device D. If the
devices in MD_B can operate properly, at least Device C is operational.
Figure 3 Two nested MDs
CFD exchanges messages and performs operations on a per-domain basis. By planning MDs properly in
a network, you can use CFD to rapidly locate failure points.
Maintenance association
An MA is a set of maintenance points MPs in an MD. An MA is identified by the "MD name + MA
name." You can configure multiple MAs in an MD as needed.
An MA serves a VLAN. Packets sent by the MPs in an MA carry the relevant VLAN tag. An MP can
receive packets sent by other MPs in the same MA.
21
3, MD_A
Figure

Advertisement

Table of Contents
loading

Table of Contents