Service Manual

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
• 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.
Table 7. Continuity Check Message Processing
Frames at Frames from UP-MEP Action Down-MEP Action MIP Action
Less than my level Bridge-relay side or
Wire side
Drop Drop Drop
My level Bridge-relay side Consume Drop Add to MIP-DB and
forward
My level Wire side Drop Consume add to MIP-DB and
forward
802.1ag 90