Line Protection and Restoration
Ensuring High Availability
Metrobility's patented dual port interface line
cards and standalone units offer redundant data
paths for line protection and restoration (LPR) to
prevent data loss due to cable failure, port failure,
or catastrophic switch failures. Redundant links offer
unique advantages for mission-critical networks over
legacy fault tolerant approaches for time sensitive
applications which require a higher level of security
and alarm notification.
This physical layer solution is able to isolate
failures with a faster recovery time and is simpler to
implement when compared to using Spanning Tree
protocols.
Metrobility's Patented Redundant Technology
Metrobility's patented line protection and
restoration technology ensures a quick recovery from
a physical layer failure. The LPR technology converges
quickly to minimize packet loss. The low packet frame
loss is a maximum loss of 1-2 packets (measured with
minimum packet size and minimum inter-packet gap)
during a failover transmission.
The LPR devices have two operational modes
to preserve network availability — Dynamic Recovery
Mode or Network Select Mode.
Automatic traffic re-routing
When configured in Dynamic Recovery Mode,
link failure is automatically detected and traffic
is immediately rerouted to a secondary path or
switch. This instantaneous path restoration is ideal
for critical areas that require a high degree of fault
tolerance.
Optional manual traffic re-routing
Network Select Mode enables the administrator
to manually redirect traffic to a secondary data path,
in order to perform maintenance on the first path, for
example. Both options ensure that network downtime
does not affect users.
Innovative Traffic Monitoring for Re-Routing
SONAR (Switch on No Activity Received), avail-
able on select models, offers an even higher level
of protection. By sensing not only link but also the
loss of data traffic, Metrobility's SONAR-enabled LPR
devices ensures reliability in the event of an upstream
switch failure.
Exceptional SNMP Management
Network administrators can also maximize
network uptime through proactive management.
Metrobility’s NetBeacon® element management sys-
tem provides end-to-end visibility of all Metrobility
chassis-based network components and the ability to
initiate active control through sophisticated SNMP-
based management tools.
Connectivity Options
Metrobility's LPR solutions support 100Mbps
and 1000Mbps networks. Extended distances up to
100km (100 and 1000Mbps only) may be achieved
through 1550nm singlemode fiber connections.
User-configurable Gigabit Ethernet Optics
The Gigabit Ethernet LPR line card utilizes
pluggable optics which may be easily replaced as
network requirements change. Choose from small
form factor (SFP) multimode or singlemode options.
The Metrobility® Difference
Fast failover (6.72 microsec-
onds over 100Mbps) ensures
low packet loss
Full signal retiming, regen-
eration and reamplication
allows for maximum
segment length
Unique dual port interface
line cards provide data link
redundancy to meet critical
network uptime requirements
Complete range of fiber optic
connector types provide
network design flexibility
Optional advanced SNMP-
based monitoring and man-
agement features for interface
line cardst
NEBS Level 3 compliant
Product Highlights
Interoperates with half-duplex
or full-duplex mode devices
Strict standard compliance
ensures compatibility with
other vendors’ equipment for
exible connectivity
SONAR - Switch on No
Activity Received option
available on select models
• Dynamic Recovery Mode for 6.72 microseconds failover
@100Mbps
• Network Select Mode for backup and maintenance
• SONAR: Switch on absence of traffic
• Extended distances up to 100km
• Copper-to-dual copper; Copper-to-dual fiber; Fiber-to-
dual fiber
• Frame Size Transparent
Patented Optical Ethernet Redundant Paths for
Ethernet, Fast Ethernet, and Gigabit Ethernet
Copper to Dual Copper
(on left - single slot)
Copper to Dual Fiber
(100Mbps requires two slots)
Interface Line Cards
Standalone Models
(24 pages)
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