Protection switchover technologies – H3C Technologies H3C S12500 Series Switches User Manual
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Technology Introduction
Reference
Track
The Track module is used to implement collaboration between
different modules. The collaboration here involves three parts: the
application modules, the Track module, and the detection modules.
These modules collaborate with one another through collaboration
entries. That is, the detection modules trigger the application modules
to perform certain operations through the Track module. More
specifically, the detection modules probe the link status, network
performance and so on, and inform the application modules of the
detection result through the Track module. Once notified of network
status changes, the application modules deal with the changes to
avoid communication interruption and network performance
degradation.
Protection switchover technologies
Protection switchover technologies aim at recovering network faults. They back up hardware, link, routing,
and service information for switchover in case of network faults to ensure continuity of network services.
Table 3 Protection switchover technologies
Technology Introduction
Reference
Active and
standby
switchover
Devices supporting active and standby switchover are typically
equipped with two main boards, with one being the active main
processing unit (MPU), and the other being the standby MPU. The
configurations on the standby MPU are the same as those on the
active MPU. When the active MPU fails or is removed, the standby
MPU automatically becomes the active MPU to ensure non-stop
operating of the devices.
"Configuring active
and standby
Ethernet Link
Aggregation
Ethernet link aggregation, most often simply called link
aggregation, aggregates multiple physical Ethernet links into one
logical link to increase link bandwidth beyond the limits of any one
single link. This logical link is called an aggregate link. It allows for
link redundancy because the member physical links can
dynamically back up one another.
Layer 2—LAN
Switching
Configuration Guide
Smart Link
Smart Link is a feature developed to address the slow convergence
issue with STP. It provides link redundancy as well as fast
convergence in a dual uplink network, allowing the backup link to
take over quickly when the primary link fails.
MSTP
As a Layer 2 management protocol, the Multiple Spanning Tree
Protocol (MSTP) eliminates Layer 2 loops by selectively blocking
redundant links in a network, and in the mean time, allows for link
redundancy.
Layer 2—LAN
Switching
Configuration Guide
RRPP
The Rapid Ring Protection Protocol (RRPP) is a link layer protocol
designed for Ethernet rings. RRPP can prevent broadcast storms
caused by data loops when an Ethernet ring is healthy, and rapidly
restore the communication paths between the nodes in the event
that a link is disconnected on the ring.