C
HAPTER
14
| Basic Administration Protocols
Connectivity Fault Management
– 519 –
◆ Link Trace Cache Hold Time – The hold time for CFM link trace cache
entries. (Range: 1-65535 minutes; Default: 100 minutes)
Before setting the aging time for cache entries, the cache must first be
enabled in the Linktrace Cache attribute field.
◆ Link Trace Cache Size – The maximum size for the link trace cache.
(Range: 1-4095 entries; Default: 100 entries)
If the cache reaches the maximum number of specified entries, or the
size is set to a value less than the current number of stored entries, no
new entries are added. To add additional entries, the cache size must
first be increased, or purged (see "Displaying Fault Notification
Settings").
Continuity Check Errors
◆ Connectivity Check Config – Sends a trap if this device receives a
continuity check message (CCM) with the same maintenance end point
identifier (MPID) as its own but with a different source MAC address,
indicating that a CFM configuration error exists.
◆ Connectivity Check Loop – Sends a trap if this device receives a CCM
with the same source MAC address and MPID as its own, indicating that
a forwarding loop exists.
◆ Connectivity Check MEP Down – Sends a trap if this device loses
connectivity with a remote maintenance end point (MEP), or
connectivity has been restored to a remote MEP which has recovered
from an error condition.
◆ Connectivity Check MEP Up – Sends a trap if a remote MEP is
discovered and added to the local database, the port state of a
previously discovered remote MEP changes, or a CCM is received from a
remote MEP which as an expired entry in the archived database.
MEP Up traps are suppressed when cross-checking of MEPs is enabled
10
because cross-check traps include more detailed status information.
Cross-check Errors
◆ Cross Check MA Up – Sends a trap when all remote MEPs in an MA
come up.
An MA Up trap is sent if cross-checking is enabled
10
, and a CCM is
received from all remote MEPs configured in the static list for this
maintenance association
11
.
◆ Cross Check MEP Missing – Sends a trap if the cross-check timer
expires and no CCMs have been received from a remote MEP configured
in the static list.
A MEP Missing trap is sent if cross-checking is enabled
10
, and no CCM is
received for a remote MEP configured in the static list
11
.
10. Cross-checking must be enabled for this type of trap to be reported (see "Configuring CFM
Maintenance Associations").
11. See "Configuring Maintenance End Points".
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