Continuity Check Messages - Dell S4820T Configuration Manual
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show ethernet cfm maintenance-points remote detail [active | domain {level |
name} | expired | waiting]
•
Display the MIP Database.
EXEC Privilege mode
show ethernet cfm mipdb
Example of Displaying the MEP Database
Dell#show ethernet cfm maintenance-points remote detail
MAC Address: 00:01:e8:58:68:78
Domain Name: cfm0
MA Name: test0
Level: 7
VLAN: 10
MP ID: 900
Sender Chassis ID: Force10
MEP Interface status: Up
MEP Port status: Forwarding
Receive RDI: FALSE
MP Status: Active
Setting the MP Database Persistence
To set the database persistence, use the following command.
•
Set the amount of time that data from a missing MEP is kept in the continuity check database.
ECFM DOMAIN
database hold-time minutes
The default is 100 minutes.
The range is from 100 to 65535 minutes.
Continuity Check Messages
Continuity check messages (CCM) are periodic hellos.
Continuity check messages:
•
discover MEPs and MIPs within a maintenance domain
•
detect loss of connectivity between MEPs
•
detect misconfiguration, such as VLAN ID mismatch between MEPs
•
to detect unauthorized MEPs in a maintenance domain
CCMs are multicast Ethernet frames sent at regular intervals from each MEP. They have a destination
address based on the MD level (01:80:C2:00:00:3X where X is the MD level of the transmitting MEP from
0 to 7). All MEPs must listen to these multicast MAC addresses and process these messages. MIPs may
optionally process the CCM messages the MEPs originate and construct a MIP CCM database.
102
802.1ag
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