Ring Protection Flashcards
The Ethernet Ring Protection Switching feature implements protection switching mechanisms for Ethernet layer ring topologies.
ITU-T G.8032 ERP - Ethernet Ring Protection
What is the prerequisite for configuring ERP?
The Ethernet Flow Points (EFPs) must be configured.
What is the name of the link that protects the ERP ring?
Ring Protection Link (RPL)
No traffic flows through the Ring Protection Link (RPL)
true
The following is a list of RPL types (or RPL nodes) and their functions:
_____________ —Responsible for blocking traffic over the RPL so that no loops are formed in the Ethernet traffic. There can be only one _____________ in a ring.
_____________—An Ethernet ring node adjacent to the RPL. It is responsible for blocking its end of the RPL under normal conditions. This node type is optional and prevents RPL usage when protected.
______________ is an Ethernet ring node adjacent to an RPL owner node or RPL neighbor node. It is mainly used for FDB flush optimization on the ring. This node is also optional.
RPL owner - Responsible for blocking the RPL
RPL neighbor node - Neighbor to the RPL link
RPL next-neighbor node - Neighbor to one of the two previous
_________________ and line status messages are used to detect ring link and node failure.
Connectivity Fault Management (CFM)
Nodes on the ring use control messages called ____________
Ring Automatic Protection Switching (R-APS)
Any failure along the ring triggers a __________________ message in both directions of the nodes adjacent to the failed link, after the nodes have blocked the port facing the failed link.
On obtaining this message, the RPL owner unblocks the RPL port.
R-APS Signal Failure (R-APS SF)
A G.8032 ring can support multiple instances. An instance is a logical ring running over a physical ring.
true tipo pvstp
O padrão _______ é conhecido como Provider Backbone Bridge
IEEE 802.1ah
