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Configuring ATM Over MPLS Trunks
Configuring Feeder Logical Ports
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/058-31
For ATMoMPLS UNI/NNI feeder logical ports, you can configure the fields in the 
ILMI/OAM tab as described in Table 8-8. 
Table 8-8. Add Logical Port: ILMI/OAM Tab
Field Action/Description
Enable Select the check box to reserve a percentage of bandwidth in 
the VBR-NRT QoS class for ILMI.
Clear the check box (default) to disable ILMI and not have 
reserve bandwidth. If the attached device cannot run ILMI, 
leave ILMI disabled. 
Note: To use line loopback diagnostics, you must disable ILMI 
support. 
VPI Id (0-15)
Enter the ID of the VPI you want to use for ILMI polling. 
The default value is zero (0). 
VCI Id (0-1023)
Enter the ID of the VCI you want to used for ILMI polling. 
The default value is 16. 
Loss Threshold (K) Enter a value for the number of times (K) the logical port will 
issue an ILMI poll before the link is considered down. If no 
responses are seen in K x T seconds, the link is considered 
down. The default value is 4.
Polling Period (sec) Enter the interval for the polling period (T). The switch 
generates an ILMI poll every T seconds.
The default is 5 seconds.
Forward: Select
Reverse: Select
Accesses the ILMI Forward/Reverse Traffic Descriptor dialog 
box. This option enables you to modify the traffic 
characteristics for the control channel. This feature is known as 
configurable control channel. See “Traffic Descriptor 
Attributes” on page 3-41 to complete the fields on this dialog 
box.