Using Interswitch Protocols
AMAP Overview
OmniSwitch 6624/6648 Network Configuration Guide
April 2004
page 8-3
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.
AMAP Transmission States
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).
Switch A
Switch B
Switch C
Spanning Tree Path
OmniSwitch 7700
TM
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
Содержание OmniSwitch 6624
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Страница 174: ...Verifying 802 1Q Configuration Configuring 802 1Q page 9 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 264: ...Verifying the RIP Configuration Configuring RIP page 13 16 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 276: ...Verifying the RDP Configuration Configuring RDP page 14 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...