Users Guide

Displaying the MP Databases
CFM maintains two MP databases:
• MEP Database (MEP-DB): Every MEP must maintain a database of all other MEPs in the MA that have announced their presence
via CCM.
• MIP Database (MIP-DB): Every MIP must maintain a database of all other MIPs in the MA that have announced their presence via
CCM.
To display the MEP and MIP databases, use the following commands.
• Display the MEP Database.
EXEC Privilege mode
show ethernet cfm maintenance-points remote detail [active | domain {level | name} | expired
| waiting]
• Display the MIP Database.
EXEC Privilege mode
show ethernet cfm mipdb
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
• 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.
MEPs and MIPs filter CCMs from higher and lower domain levels as described in the following table.
802.1ag
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