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3 Capacity Limit
(16) IEEE 802.3ah/UDLD
The following table describes the capacity limits for IEEE 802.3ah/UDLD.
Table 3-35 Capacity limits for IEEE 802.3ah/UDLD
Model
All models
(17) L2 Loop Detection
The following table describes the transmission rates for L2 loop detection frames.
Table 3-36 Transmission rate for L2 loop detection frames
Model
All models
Formula for calculating the number of ports and VLANs on which L2 loop detection frames
can be transmitted:
Number of ports and VLANs subject to L2 loop detection
(pps)
#1
Frames that exceed 20 (packets/s) will not be sent. Loop failures cannot be detected
on target ports or VLANs from which frames have not been sent.
#2
Number of ports subject to L2 loop detection
detection
(18) CFM
The following table describes the capacity limits for CFM.
Table 3-37 Capacity limits for CFM
Model
All models
#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:
When the MA contains both Down and Up MEPs:
Each channel group is counted as one port. You can check the total number of CFM
ports using the
#2
The total number of CFM ports and total number of remote MEPs are governed by
the capacity limits when using the default CCM transmission interval. The capacity
36
Maximum number of link monitoring information items
Maximum physical ports for the device
L2 loop detection frame transmission rate (per switch)
#1
20 (packets/s)
≤
transmission interval (sec.)
Number
Number
of
of MAs
domains
8/device
32/device
Total number of VLAN ports in Down MEP
Total number of VLAN ports on the primary VLAN
show cfm summary
×
number of VLANs subject to L2 loop
Number
Number
of MEPs
of MIPs
32/device
32/device
command.
#2
/
frame transmission rate
Total
Total
number of
number of
#1,
CFM ports
remote
#2
#2, #3
MEPs
256/device
2016/device
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