Chapter 13
| Basic Administration Protocols
Connectivity Fault Management
– 492 –
Configuring Global
Settings for CFM
Use the Administration > CFM (Configure Global) page to configure global settings
for CFM, such as enabling the CFM process on the switch, setting the start-up delay
for cross-check operations, configuring parameters for the link trace cache, and
enabling traps for events discovered by continuity check messages or cross-check
messages.
Parameters
These parameters are displayed:
Global Configuration
◆ CFM Status – Enables CFM processing globally on the switch.
(Default: Enabled)
To avoid generating an excessive number of traps, the complete CFM
maintenance structure and process parameters should be configured prior to
enabling CFM processing globally on the switch. Specifically, the maintenance
domains, maintenance associations, and maintenance end-points (MEPs)
should be configured on each participating bridge using the Configure MD
page (see "Configuring CFM Maintenance Domains"), Configure MA page (see
"Configuring CFM Maintenance Associations"), and the Configure MEP page
(see "Configuring Maintenance End Points").
When CFM is enabled, hardware resources are allocated for CFM processing.
◆ MEP Cross Check Start Delay – Sets the maximum delay that a device waits for
remote MEPs to come up before starting the cross-check operation. (Range: 1-
65535 seconds; Default: 10 seconds)
This parameter sets the time to wait for a remote MEP to come up, and the
switch starts cross-checking the list of statically configured remote MEPs in the
local maintenance domain (Configure Remote MEP page, see "Configuring
Remote Maintenance End Points") against the MEPs learned through continuity
check messages (CCMs).
The cross-check start delay should be configured to a value greater than or
equal to the continuity check message interval to avoid generating
unnecessary traps (see "Configuring CFM Maintenance Associations").
LInk Trace Cache Settings
◆ Link Trace Cache – Enables caching of CFM data learned through link trace
messages. (Default: Enabled)
A link trace message is a multicast CFM frame initiated by a MEP, and forwarded
from MIP to MIP, with each MIP generating a link trace reply, up to the point at
which the link trace message reaches its destination or can no longer be
forwarded.
Use this command attribute to enable the link trace cache to store the results of
link trace operations initiated on this device. Use the CFM Transmit Link Trace
page (see "Transmitting Link Trace Messages") to transmit a link trace message.
Link trace responses are returned from each MIP along the path and from the
target MEP. Information stored in the cache includes the maintenance domain
To Next Page
Loading...
Need help?
General