CIENA-CES-VLLI-MIB

Description: Manages Virtual LAN-based Local Loop Interconnect (VLLI) services on Ciena CES switches.

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CIENA-CES-VLLI-MIB is a Ciena vendor MIB implementing Virtual Link Loss Indication (VLLI) for Carrier Ethernet Switching (CES) platforms, a feature that propagates a remote link-down condition across a virtual circuit so the far end can react as if its own local link had failed. No sample objects were available for this module, but VLLI-type MIBs typically expose per-service or per-port enable/status objects indicating whether link-loss propagation is active and whether a remote fault condition is currently being signaled. Its monitoring value is fault-status oriented, letting an operator confirm that a service correctly reports a link-down state to the customer-facing port when the far-end or core-facing link fails, which is important for triggering client-side protection switching. It is a Ciena-specific vendor MIB associated with the CES fault-propagation feature set rather than an IETF standard, though functionally similar in spirit to standard link-fault-propagation features like EFM remote fault indication. It's deployed in carrier Ethernet access and metro networks running Ciena CES switches where end-to-end fault propagation across a virtual circuit is required for fast client protection. Engineers can download the CIENA-CES-VLLI-MIB file directly to load it into their MIB browser.

An operator would check the VLLI service/port status to confirm link-loss-indication is enabled on a given virtual circuit endpoint, so that if the associated core-facing link fails, the customer-facing port is forced into a link-down state. This propagated fault would be observed as an unexpected link-down event on the customer-edge device even though its own physical cable is intact, correctly triggering that device's protection switchover. Because no sample objects were available for this MIB, exact object names could not be confirmed, but the module description explicitly identifies it as implementing virtual link-loss indication.

Ciena CES (Carrier Ethernet Services) VLLI (Virtual Link Layer Interface) MIB providing SNMP management objects for monitoring and configuring VLLI functionality on Ciena service aggregation switches and network equipment.