Amap Overview; Amap Transmission States - Alcatel OmniSwitch 6600 Family Network Configuration Manual

Omniswitch 6600 series

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Using Interswitch Protocols

AMAP Overview

The Alcatel Mapping Adjacency Protocol (AMAP) is used to discover the topology of OmniSwitches or

Omni S/Rs in a particular installation. Using this protocol, each switch determines which OmniSwitches

or Omni S/Rs are adjacent to it by sending and responding to Hello update packets. For the purposes of

AMAP, adjacent switches are those that:

have a Spanning Tree path between them

do not have any switch between them on the Spanning Tree path that has AMAP enabled

In the illustration here, all switches are on the Spanning Tree path. OmniSwitch A and OmniSwitch C

have AMAP enabled. OmniSwitch B does not. OmniSwitch A is adjacent to OmniSwitch C and vice

versa. If OmniSwitch B enables AMAP, the adjacency changes. OmniSwitch A would be next to B, B

would be adjacent to both A and C, and C would be adjacent to B.

OmniSwitch 6648

AMAP switch ports are either in the discovery transmission state, common transmission state, or passive

reception state. Ports transition to these states depending on whether or not they receive Hello responses

from adjacent switches.

Note. All Hello packet transmissions are sent to a well-known MAC address (0020da:007004).

OmniSwitch 6600 Family Network Configuration Guide

OmniSwitch 7700

Spanning Tree Path

AMAP Overview

OmniSwitch 6648

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