300-420 · Question #311
Refer to the exhibit. Which process does the Ethernet LMI protocol follow that is defined by the MEF 16 Technical Specification?
The correct answer is B. notifies the CE of the availability state of a configured EVC. The Ethernet Local Management Interface (LMI) protocol, as specified by MEF 16, serves to inform the Customer Edge (CE) device about the current operational status of a configured Ethernet Virtual Connection (EVC).
Question
Refer to the exhibit. Which process does the Ethernet LMI protocol follow that is defined by the MEF 16 Technical Specification?
Exhibit
Options
- Abroadcasts multicast network routes from the CE to the PE
- Bnotifies the CE of the availability state of a configured EVC
- Ccommunicates ENI and EVC attributes to the CE
- Dbroadcasts to all subnets from the CE when an EVC is added
How the community answered
(42 responses)- B93% (39)
- C2% (1)
- D5% (2)
Why each option
The Ethernet Local Management Interface (LMI) protocol, as specified by MEF 16, serves to inform the Customer Edge (CE) device about the current operational status of a configured Ethernet Virtual Connection (EVC).
Ethernet LMI does not broadcast multicast network routes from the CE to the PE; routing protocols are responsible for exchanging network routes.
The Ethernet LMI protocol functions by sending status messages to the CE, thereby notifying it of the availability state (up or down) of its provisioned EVC, which is critical for service monitoring and failover.
While E-LMI communicates EVC status, it does not primarily communicate detailed Ethernet Network Interface (ENI) and EVC attributes; those are typically managed via provisioning systems.
Ethernet LMI's role is not to broadcast to all subnets from the CE when an EVC is added, but rather to signal the operational status of existing EVCs.
Concept tested: MEF 16 Ethernet LMI functionality
Source: https://www.juniper.net/documentation/us/en/software/junos/interfaces-fundamentals/topics/topic-map/ethernet-lmi.html
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