XMAP
Page 21-2
XMAP
The Mapping Adjacency Protocol (
XMAP
) is used to discover the topology of OmniS/Rs in a
particular installation. Using this protocol, each switch determines which OmniS/Rs are adja-
cent to it by sending and responding to Hello update packets. For the purposes of
XMAP
,
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
XMAP
enabled
♦
Note
♦
XMAP
replaces the Adjacency Only mode of earlier
versions of
VAP
.
In the illustration here, all switches are on the Spanning Tree path. Omni Switch/Router A
and Omni Switch/Router C have
XMAP
enabled. Omni Switch/Router B does not. Omni
Switch/Router A is adjacent to Omni Switch/Router C and vice versa. If Omni Switch/Router B
enables
XMAP
, the adjacency changes. A would be adjacent to B, B would be adjacent to both
A and C, and C would be adjacent to B.
XMAP Adjacency
OSR A
OSR B
OSR C
S
PANNING
T
REE
P
ATH
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...