3.12.2 CFM

The following table describes the capacity limits for CFM.

Table 3-44 CFM housing conditions
Model	Number of domains	Number of MAs	Number of MEPs	Number of MIPs	Total number of CFM ports12	Total number of remote MEP 2 3
All models	8/Device	32/device	32/device	32/device	256/device	2016/device

#1

Total number of CFM ports is the total number of VLAN ports that send CFM frames in the primary VLAN associated with the MA.

When the MA contains only Down MEPs:: Total number of VLAN ports in Down MEP
When the MA contains both Down and Up MEPs:: Total number of VLAN ports on the primary VLAN

You can check the total number of CFM ports using the show cfm summary operation command.

#2

The total number of CFM ports and total number of remote MEPs are governed by the capacity limits when using the default CCM sending interval. The capacity limits of the total number of CFM ports and total number of remote MEPs change if you change the CCM sending interval. The following table describes the capacity limits for total CFM ports and total remote MEPs according to the set CCM sending interval.

Table 3-45 Accommodation conditions according to CCM transmission interval
Model	Interval for sending CCMs	Total number of CFM ports	Total number of remote MEPs
All models	1 minute or longer	256/device	2016/device
	10 seconds	128/device	2016/device
	1 second	50/equipment	200/device

#3

Total number of remote MEPs is the sum of MEPs on other devices. This affects the CCM receiving performance from MEPs. You can check the total number of remote MEPs using the show cfm remote-mep operation command.

Table 3-46 Conditions for accommodating physical ports and groups of channels in the CFM
Model	Total number of physical ports and channel groups for which MEP .MIP can be set#
All models	8/Device

#: Multiple MEPs or MIPs can be assigned to the same port. Each channel group is counted as one port.

Table 3-47 CFM database accommodation conditions
Model	MEP CCM Database Number of entries	MIP CCM Database Number of entries	Linktrace Database Number of entries^#
All models	63/MEP	2048/device	1024/switch

#: If information for 256 devices is stored per route, the database can store information for a maximum of four routes (1024 / 256 devices = 4 routes).