18
EAIS
Ethernet Alarm Indication Signal (EAIS) enables collaboration between the Ethernet port status and the
AIS function. When a port on the device (not necessarily an MP) goes down, it immediately starts to send
EAIS frames periodically to suppress the error alarms. When the port goes up again, it immediately stops
sending EAIS frames. When the MEP receives the EAIS frames, it suppresses the error alarms locally, and
continues to send the EAIS frames. If a MEP receives no EAIS frames within 3.5 times the EAIS frame
transmission interval, the fault is considered cleared. The port stops sending EAIS frames and restores the
error alarm function. EAIS frames are multicast frames.
NOTE:
This function is supported only by Release 3108P01 and later versions.
Protocols and standards
•
IEEE 802.1ag,
Virtual Bridged Local Area Networks Amendment 5: Connectivity Fault
Management
•
ITU-T Y.1731,
OAM functions and mechanisms for Ethernet based networks
CFD configuration task list
For CFD to work correctly, design the network by performing the following tasks:
•
Grade the MDs in the entire network, and define the boundary of each MD.
•
Assign a name for each MD. Make sure that the devices in the same MD use the same MD name.
•
Define the MA in each MD according to the VLAN you want to monitor.
•
Assign a name for each MA. Make sure that the devices in the same MA in the same MD use the
same MA name.
•
Determine the MEP list of each MA in each MD. Make sure that devices in the same MA maintain
the same MEP list.
•
At the edges of MD and MA, MEPs should be designed at the device port. MIPs can be designed
on devices or ports that are not at the edges.
To configure CFD, perform the following tasks:
Tasks at a glance
Configuring basic CFD settings
:
•
(Required.)
•
(Required.)
•
(Required.)
•
(Required.)
Configuring MIP auto-generation rules
:
•
(Required.)
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