Specifications

Chapter 1 Introduction Installation and Operation Manual
1-4 Overview RICi-622GE Ver. 1.0
Encapsulation
The Ethernet traffic is encapsulated for transmission over SDH/SONET network
using one of the following link layer protocols:
• Link Access Procedure for SDH/SONET (LAPS) protocols in accordance with
ITU-T Rec. X.86 draft recommendations
• Generic Framing Procedure (GFP) in accordance with ITU-T Rec. G.7041,
ANSI T1-105.02, framed mode.
The traffic encapsulation type is user-configurable.
Loop Detection
RICi-622GE features a mechanism to detect Ethernet loops in the Ethernet
interface and SDH network, and avoid them by disabling the bridge port.
The loop detection mechanism is based on periodic transmission of Ethernet
loop detection frames with source and destination address equal to the MAC
address of the originating RICi-622GE device, so they do not propagate in the
network beyond the opposite Ethernet bridge port.
When the loop detection mechanism is active, loop detection frames are sent
once every five seconds. If a loop detection frame is received back at the sending
port three times within 20 seconds, a loop is declared, the LOOP DETECTED trap
is sent, and the bridge port is disabled for four minutes. At the end of the four
minutes, the bridge port is restored to service and loop detection frames are
again transmitted.
Fault Propagation
The unit provides user-configurable bidirectional fault propagation. SDH/SONET
alarms can optionally propagate and cause the Gigabit Ethernet link to shut
down. Gigabit Ethernet alarms can also be propagated over the SDH/SONET link
Management
Setup, monitoring, and diagnostics can be performed using one of the following
methods:
• Out-of-band via ASCII terminal connected to the V.24/RS-232 DCE control port
• Network management using Telnet, terminal Web-based application, or an
SNMP-based management system:
 Inband management via user or network port
 Out-of-band management via the dedicated 10/100BaseT management
port.
ConfiguRAD
ConfiguRAD is a user-friendly Web-based terminal management system that
provides remote device configuration and maintenance. It is embedded into
RICi-622GE and provided at no extra cost. ConfiguRAD can be run from any
standard Web browser.