Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Connectivity Fault Management
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
) to transmit a linktrace message.
Linktrace responses are returned from each MIP along the path and from the target MEP.
Information stored in the cache includes the maintenance domain name, MA name, MEPID,
sequence number, and TTL value (see
"Displaying Fault Notification Settings"
•
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
Frame Delay Threshold
•
Delay Measure Threshold – The threshold for frame delay measurements at which an SNMP
trap is sent and an entry is recorded in the system log. (Range: 10-500 in units of 10
milliseconds: Default: 100, that is 1000 ms)
Also set this same parameter under SNMP Trap Configuration to enable SNMP trap messages
for delay-message transmissions exceeding the specified threshold.
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
19
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
19
, and a CCM is received from all remote
MEPs configured in the static list for this maintenance association
20
.
19. Cross-checking must be enabled for this type of trap to be reported (see
20. See