Protection; Dual Protection; Ethernet - Alcatel-Lucent 9500 MXC User Manual

Chapter 6. 9500 MXC Performance and Diagnostic Features

Protection

Dual Protection

Ethernet

Vol. II-6-4
installation, and software configurability means traffic circuits can be remotely
configured and executed.
TDM Protection Options
Hot-standby and diversity options are complemented by ring protection for PDH
traffic, where the protection is managed within the 9500 MXC for Super-PDH
ring capacities up to 75xE1 or 100xDS1; no external equipment is required.
Ring protection timers are provided to set an unwrap time, which can be set to act
after a period of error-free operation, or to a time of day.
The DAC 155oM multiplexer plug-in supports fiber ring closures on capacities to
63xE1 or 84xDS1.
DAC (tributary) protection is supported for E3/DS3 and STM1/OC3 DACs,
including the DAC 155oM.
Ethernet Protection Options
The DAC GE directly supports carrier-class RWPR (Resilient Wireless Packet
Ring), an enhanced RSTP capability for Ethernet ring/mesh network topologies.
When a ring connection fails, RWPR supports ring re-convergence times of less
than 100 ms, compared to the 1 to 5 seconds typically needed for RSTP.
Protected links can also be protected; a master protection option protects two
subordinate protected links, or one protected link with one non-protected link.
Dual protection options are:
• Frequency diversity over two hot-standby links, or over one hot-standby link
and one non-protected link.
• Frequency diversity over two space diversity links, or over one space diversity
link and one non-protected link.
The 9500 MXC Node provides comprehensive solutions for transporting
Ethernet traffic using the DAC ES plug-in for Fast Ethernet, and DAC GE for
Gigabit Ethernet:
DAC ES
• Fast Ethernet is supported on one or two transport channels, with each channel
configurable to 100 Mbps.
• Options include selection of transparent, VLAN or mixed-mode operation, and
QoS policing and prioritization.
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