Avaya a500 사용자 가이드

Cajun A500 ATM Switch Overview

Cajun A500 ATM Switch User Guide

 1-9

Figure 1-4: Local-access Mode

The designated A500 is configured with the ATM, MAC and IP addresses of the other 

Cajun A500s in the network. 

Note:  The MAC address is the one associated with the LEC, not the ethernet port. 

U The designated A500 accepts a connection from another Cajun A500 if its ATM 

address matches one of the configured addresses. 

U The MAC and IP addresses combine to populate entries in the MIPM table. The 

entry in the MIPM for PNA is the base (LEC) MAC address and IP address of the 

designated A500. 

U The mini-bridge examines all unicast frames received on the local ethernet and 

determine whether they specify the destination MAC address of one of the A500’s. 

U If the frame is for one of the Cajun A500s, the mini-bridge forwards the frame onto 

the associated VCC or to PNA if it is to its own MAC address. Unicast frames not 

destined to the MAC address of an A500 are dropped. 

U When a frame is received by the designated A500 from PNA, or from any of the 

VCCs to the other A500s, it is blindly forwarded onto the local ethernet port, 

regardless of whether the frame is a uni-cast, multi-cast or broadcast. 

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Proxy-ARP

Handler

Mini-Bridge

Local Ethernet

PNA

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VCCs to other A500s