RAD Data comm 100 Specifikace stáhnout pdf (Strana 43)

Installation and Operation Manual Chapter 1 Introduction

Egate-100 Ver. 4.0 Functional Description 1-11

Bridge

Egate-100 has a multiport bridge with up to two Ethernet bridge ports and up to

130 bridge ports over the CH-STM-1/OC-3 interface. The bridge supports two

modes of operation: VLAN-aware and VLAN-unaware.

VLAN-Aware Mode

This mode enables creation of su/jointfilesconvert/371155/bgroups of bridge ports within the bridge. Each

su/jointfilesconvert/371155/bgroup is defined per VLAN and is associated with a unique VLAN ID. Frames

with a specific VLAN ID can be forwarded only between bridge ports that are

members of the same VLAN, thus enabling a total separation between different

VLAN users within the same bridge.

The bridge features in VLAN-aware mode are:

• Full VLAN-aware bridge as per 802.1Q

• VLAN tag options:

 Option for VLAN tag stacking (“double VLAN”) at bridge port ingress

 Option for VLAN tag stacking (“double VLAN”) at bridge port egress

 Option to copy/set VLAN priority tag at port ingress

 Option for VLAN tag stripping at port egress

 Option for VLAN tag stripping at bridge port ingress.

• Learning and forwarding according to MAC address and VID

• Learning of up to 64,000 MAC table entries (MAC-VID pairs)

• Up to 1024 VLANs supported (out of the full VLAN range)

• MAC learning limit – can be configured for each bridge port

• Aging time – can be configured at the bridge level

• MAC table viewing (learned MACs)

• Optional loop detection

• Ethernet OAM (802.3ah).

The mechanism of the VLAN-aware bridge 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 – learns new MAC table entries (MAC only or MAC-VID pairs)

• Aging – checks the forwarding MAC table periodically

• Forwarding – decides to which bridge port/ports to forward the frame

• Egress – selects the format of the transmitted frame at the output port, with

or without VLAN.

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RAD Data comm 100 Specifikace Strana 43