Specifications

Installation and Operation Manual Chapter 1 Introduction
RICi-4E1/T1, RICi-8E1/T1 Ver. 2.0 Functional Description 1-7
1.3 Functional Description
This section lists and explains the key features of RICi-4E1/T1, RICi-8E1/T1.
Bridge
RICi-4E1/T1, RICi-8E1/T1 has multi-port bridging capability with up to six bridge
ports. The bridge supports two modes of operation, VLAN-aware and VLAN-
unaware.
The mechanism of each mode can be described as five different processes:
• Ingress. Checks each frame entering the bridge to decide if and how this
frame should be passed on to the forwarding process.
• Learning. Applies to MAC only or MAC VID pairs and learns new MAC table
entries.
• Aging. Checks the forwarding MAC table periodically.
• Forwarding. Decides to which bridge port/ports to forward the frame.
• Transmission. Applies to the VLAN-aware mode only and selects the format
of the transmitted frame at the output port: with VLAN ID (tagged) or
without VLAN ID (untagged).
Bridge features and these five processes are described below for each mode.