1-3
Technology
Introduction
Reference
NQA
Network Quality Analyzer (NQA) analyzes network performance,
services and service quality through sending test packets, and
provides you with network performance and service quality
parameters such as jitter, TCP connection delay, FTP connection
delay and file transfer rate.
Network
Management and
Monitoring
Configuration
Guide/NQA
Configuration
Monitor Link
Monitor link is a port collaboration function. It is usually used in
conjunction with Layer 2 topology protocols. The idea is to monitor
the states of uplink ports and adapt the up/down state of downlink
ports to the up/down state of uplink ports, triggering link switchover
on the downstream device in time.
High Availability
Configuration
Guide/Monitor Link
Configuration
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. Upon aware of the
changes of network status, the application modules deal with the
changes accordingly to avoid communication interruption and
network performance degradation.
High Availability
Configuration
Guide/Track
Configuration
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. See
for the details of protection switchover technologies.
Table 1-3
Protection switchover technologies
Technology
Introduction
Reference
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
/Ethernet Link
Aggregation
Configuration
